From 9f5afbaa94f7a6b466d0bfb2be257187cfc4cc18 Mon Sep 17 00:00:00 2001 From: Rui Matos Date: Thu, 31 Aug 2017 17:32:43 +0200 Subject: [PATCH] housekeeping: Add a GPU memory usage notification Only works on supported nvidia GPUs and nvidia binary driver combinations. --- plugins/housekeeping/Makefile.am | 10 +- plugins/housekeeping/gsd-gpu-mem.c | 261 ++ plugins/housekeeping/gsd-gpu-mem.h | 33 + plugins/housekeeping/gsd-housekeeping-manager.c | 7 + plugins/housekeeping/nvml/include/nvml.h | 4447 +++++++++++++++++++++++ 5 files changed, 4754 insertions(+), 4 deletions(-) create mode 100644 plugins/housekeeping/gsd-gpu-mem.c create mode 100644 plugins/housekeeping/gsd-gpu-mem.h create mode 100644 plugins/housekeeping/nvml/include/nvml.h diff --git a/plugins/housekeeping/Makefile.am b/plugins/housekeeping/Makefile.am index 3841edf4..b01666ca 100644 --- a/plugins/housekeeping/Makefile.am +++ b/plugins/housekeeping/Makefile.am @@ -1,6 +1,8 @@ plugin_name = housekeeping COMMON_FILES = \ + gsd-gpu-mem.c \ + gsd-gpu-mem.h \ gsd-disk-space.c \ gsd-disk-space.h \ gsd-disk-space-helper.h \ @@ -11,20 +13,20 @@ noinst_PROGRAMS = gsd-disk-space-test gsd-empty-trash-test gsd-purge-temp-test gsd_disk_space_test_SOURCES = \ gsd-disk-space-test.c \ $(COMMON_FILES) -gsd_disk_space_test_LDADD = $(HOUSEKEEPING_LIBS) +gsd_disk_space_test_LDADD = $(HOUSEKEEPING_LIBS) -lm -ldl gsd_disk_space_test_CFLAGS = \ $(HOUSEKEEPING_CFLAGS) gsd_empty_trash_test_SOURCES = \ gsd-empty-trash-test.c \ $(COMMON_FILES) -gsd_empty_trash_test_LDADD = $(HOUSEKEEPING_LIBS) +gsd_empty_trash_test_LDADD = $(HOUSEKEEPING_LIBS) -lm -ldl gsd_empty_trash_test_CFLAGS = $(HOUSEKEEPING_CFLAGS) gsd_purge_temp_test_SOURCES = \ gsd-purge-temp-test.c \ $(COMMON_FILES) -gsd_purge_temp_test_LDADD = $(HOUSEKEEPING_LIBS) +gsd_purge_temp_test_LDADD = $(HOUSEKEEPING_LIBS) -lm -ldl gsd_purge_temp_test_CFLAGS = $(HOUSEKEEPING_CFLAGS) libexec_PROGRAMS = gsd-housekeeping @@ -51,7 +53,7 @@ gsd_housekeeping_CFLAGS = \ gsd_housekeeping_LDADD = \ $(top_builddir)/gnome-settings-daemon/libgsd.la \ $(top_builddir)/plugins/common/libcommon.la \ - $(HOUSEKEEPING_LIBS) + $(HOUSEKEEPING_LIBS) -lm -ldl desktopdir = $(sysconfdir)/xdg/autostart desktop_in_files = org.gnome.SettingsDaemon.Housekeeping.desktop.in diff --git a/plugins/housekeeping/gsd-gpu-mem.c b/plugins/housekeeping/gsd-gpu-mem.c new file mode 100644 index 00000000..a76579b6 --- /dev/null +++ b/plugins/housekeeping/gsd-gpu-mem.c @@ -0,0 +1,261 @@ +/* + * Copyright (C) 2017 Red Hat, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include +#include +#include +#include "nvml/include/nvml.h" + +typedef nvmlReturn_t (*nvml_init_t) (void); +static nvml_init_t nvml_init; +typedef nvmlReturn_t (*nvml_device_get_handle_by_index_t) (unsigned int, nvmlDevice_t *); +static nvml_device_get_handle_by_index_t nvml_device_get_handle_by_index; +typedef nvmlReturn_t (*nvml_device_get_memory_info_t) (nvmlDevice_t, nvmlMemory_t *); +static nvml_device_get_memory_info_t nvml_device_get_memory_info; +typedef const char* (*nvml_error_string_t) (nvmlReturn_t); +static nvml_error_string_t nvml_error_string; +static void *nvml_handle = NULL; +static gboolean nvml_loaded = FALSE; + +static gboolean +nvml_load (void) +{ + char *error; + + if (nvml_loaded) + goto out; + nvml_loaded = TRUE; + + nvml_handle = dlopen ("libnvidia-ml.so", RTLD_LAZY); + error = dlerror(); + if (!nvml_handle) + { + g_warning ("Loading NVML: %s", error); + goto out; + } + + nvml_init = (nvml_init_t) dlsym (nvml_handle, "nvmlInit"); + nvml_device_get_handle_by_index = (nvml_device_get_handle_by_index_t) dlsym (nvml_handle, "nvmlDeviceGetHandleByIndex"); + nvml_device_get_memory_info = (nvml_device_get_memory_info_t) dlsym (nvml_handle, "nvmlDeviceGetMemoryInfo"); + nvml_error_string = (nvml_error_string_t) dlsym (nvml_handle, "nvmlErrorString"); + error = dlerror(); + if (error) + { + g_warning ("Loading NVML: %s", error); + goto cleanup; + } + goto out; + + cleanup: + dlclose (nvml_handle); + nvml_handle = NULL; + out: + return nvml_handle != NULL; +} + +static nvmlReturn_t nvml_status = NVML_ERROR_UNINITIALIZED; +static nvmlDevice_t nvml_device = NULL; + +static nvmlReturn_t +nvml_warn (nvmlReturn_t rcode, const gchar *prefix) +{ + if (rcode != NVML_SUCCESS) + g_warning ("%s: %s", prefix, nvml_error_string (rcode)); + return rcode; +} + +static gboolean +nvml_ready (void) +{ + if (!nvml_load ()) + return FALSE; + + if (nvml_status == NVML_ERROR_UNINITIALIZED) + { + nvml_status = nvml_warn (nvml_init (), "Initializing NVML"); + if (nvml_status == NVML_SUCCESS) + nvml_warn (nvml_device_get_handle_by_index (0, &nvml_device), "Getting NVML device 0"); + } + + return nvml_status == NVML_SUCCESS && nvml_device != NULL; +} + +static void +nvml_read_mem_info (nvmlMemory_t *mem_info) +{ + if (!nvml_ready ()) + return; + + nvml_device_get_memory_info (nvml_device, mem_info); +} + + +#include +#include +#include "gsd-gpu-mem.h" + +#define POLLING_INTERVAL 30 +#define MEM_USAGE_NOTIFY_THRESHOLD 0.80 + +struct _GsdGpuMem +{ + GObject parent_instance; + + guint timeout_id; + + GDesktopAppInfo *sysmon_app_info; + NotifyNotification *notification; +}; + +G_DEFINE_TYPE (GsdGpuMem, gsd_gpu_mem, G_TYPE_OBJECT) + +static void +clear_timeout (GsdGpuMem *self) +{ + if (self->timeout_id != 0) + { + g_source_remove (self->timeout_id); + self->timeout_id = 0; + } +} + +static void +notification_closed (GsdGpuMem *self) +{ + g_clear_object (&self->notification); +} + +static void +unnotify (GsdGpuMem *self) +{ + if (!self->notification) + return; + + notify_notification_close (self->notification, NULL); +} + +static void +ignore_callback (NotifyNotification *n, + const char *a, + GsdGpuMem *self) +{ + unnotify (self); + clear_timeout (self); +} + +static void +examine_callback (NotifyNotification *n, + const char *a, + GsdGpuMem *self) + +{ + unnotify (self); + g_app_info_launch (G_APP_INFO (self->sysmon_app_info), NULL, NULL, NULL); +} + +static void +notify (GsdGpuMem *self, double mem_usage) +{ + const gchar *summary = "Running low on GPU memory"; + const gchar *icon_name = "utilities-system-monitor-symbolic"; + g_autofree gchar *body = g_strdup_printf ("GPU memory usage is at %d%%. " + "You may free up some memory by closing some applications.", + (int) round (mem_usage * 100)); + if (self->notification) + { + notify_notification_update (self->notification, summary, body, icon_name); + notify_notification_show (self->notification, NULL); + return; + } + + self->notification = notify_notification_new (summary, body, icon_name); + g_signal_connect_object (self->notification, "closed", + G_CALLBACK (notification_closed), + self, G_CONNECT_SWAPPED); + + notify_notification_set_app_name (self->notification, "GPU memory"); + + notify_notification_add_action (self->notification, + "ignore", + "Ignore", + (NotifyActionCallback) ignore_callback, + self, NULL); + + if (self->sysmon_app_info) + notify_notification_add_action (self->notification, + "examine", + "Examine", + (NotifyActionCallback) examine_callback, + self, NULL); + + notify_notification_show (self->notification, NULL); +} + +static gboolean +poll_gpu_memory (gpointer user_data) +{ + GsdGpuMem *self = user_data; + nvmlMemory_t mem_info = { 0 }; + double mem_usage = 0.0; + + nvml_read_mem_info (&mem_info); + if (mem_info.total > 0) + mem_usage = (double) mem_info.used / mem_info.total; + + if (mem_usage > MEM_USAGE_NOTIFY_THRESHOLD) + { + notify (self, mem_usage); + } + else + { + unnotify (self); + } + + return G_SOURCE_CONTINUE; +} + +static void +gsd_gpu_mem_init (GsdGpuMem *self) +{ + if (!nvml_ready ()) + return; + + self->timeout_id = g_timeout_add_seconds (POLLING_INTERVAL, poll_gpu_memory, self); + self->sysmon_app_info = g_desktop_app_info_new ("gnome-system-monitor.desktop"); +} + +static void +gsd_gpu_mem_finalize (GObject *object) +{ + GsdGpuMem *self = GSD_GPU_MEM (object); + + clear_timeout (self); + g_clear_object (&self->sysmon_app_info); + unnotify (self); + + G_OBJECT_CLASS (gsd_gpu_mem_parent_class)->finalize (object); +} + +static void +gsd_gpu_mem_class_init (GsdGpuMemClass *klass) +{ + GObjectClass *gobject_class = G_OBJECT_CLASS (klass); + + gobject_class->finalize = gsd_gpu_mem_finalize; +} diff --git a/plugins/housekeeping/gsd-gpu-mem.h b/plugins/housekeeping/gsd-gpu-mem.h new file mode 100644 index 00000000..f8967879 --- /dev/null +++ b/plugins/housekeeping/gsd-gpu-mem.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2017 Red Hat, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#ifndef _GSD_GPU_MEM_H +#define _GSD_GPU_MEM_H + +#include + +G_BEGIN_DECLS + +#define GSD_TYPE_GPU_MEM (gsd_gpu_mem_get_type ()) +G_DECLARE_FINAL_TYPE (GsdGpuMem, gsd_gpu_mem, + GSD, GPU_MEM, GObject) + +G_END_DECLS + +#endif /* _GSD_GPU_MEM_H */ diff --git a/plugins/housekeeping/gsd-housekeeping-manager.c b/plugins/housekeeping/gsd-housekeeping-manager.c index 2c94e35d..5efb0aaa 100644 --- a/plugins/housekeeping/gsd-housekeeping-manager.c +++ b/plugins/housekeeping/gsd-housekeeping-manager.c @@ -26,6 +26,7 @@ #include "gnome-settings-profile.h" #include "gsd-housekeeping-manager.h" #include "gsd-disk-space.h" +#include "gsd-gpu-mem.h" /* General */ @@ -57,6 +58,8 @@ struct GsdHousekeepingManagerPrivate { GDBusConnection *connection; GCancellable *bus_cancellable; guint name_id; + + GsdGpuMem *gpu_mem_notifier; }; #define GSD_HOUSEKEEPING_MANAGER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GSD_TYPE_HOUSEKEEPING_MANAGER, GsdHousekeepingManagerPrivate)) @@ -411,6 +414,8 @@ gsd_housekeeping_manager_start (GsdHousekeepingManager *manager, manager); g_source_set_name_by_id (manager->priv->long_term_cb, "[gnome-settings-daemon] do_cleanup"); + manager->priv->gpu_mem_notifier = g_object_new (GSD_TYPE_GPU_MEM, NULL); + gnome_settings_profile_end (NULL); return TRUE; @@ -452,6 +457,8 @@ gsd_housekeeping_manager_stop (GsdHousekeepingManager *manager) g_clear_object (&p->settings); gsd_ldsm_clean (); + + g_clear_object (&p->gpu_mem_notifier); } static void diff --git a/plugins/housekeeping/nvml/include/nvml.h b/plugins/housekeeping/nvml/include/nvml.h new file mode 100644 index 00000000..778b4bfb --- /dev/null +++ b/plugins/housekeeping/nvml/include/nvml.h @@ -0,0 +1,4447 @@ +/* + * Copyright 1993-2016 NVIDIA Corporation. All rights reserved. + * + * NOTICE TO USER: + * + * This source code is subject to NVIDIA ownership rights under U.S. and + * international Copyright laws. Users and possessors of this source code + * are hereby granted a nonexclusive, royalty-free license to use this code + * in individual and commercial software. + * + * NVIDIA MAKES NO REPRESENTATION ABOUT THE SUITABILITY OF THIS SOURCE + * CODE FOR ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR + * IMPLIED WARRANTY OF ANY KIND. NVIDIA DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOURCE CODE, INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE. + * IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, + * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS + * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE + * OR PERFORMANCE OF THIS SOURCE CODE. + * + * U.S. Government End Users. This source code is a "commercial item" as + * that term is defined at 48 C.F.R. 2.101 (OCT 1995), consisting of + * "commercial computer software" and "commercial computer software + * documentation" as such terms are used in 48 C.F.R. 12.212 (SEPT 1995) + * and is provided to the U.S. Government only as a commercial end item. + * Consistent with 48 C.F.R.12.212 and 48 C.F.R. 227.7202-1 through + * 227.7202-4 (JUNE 1995), all U.S. Government End Users acquire the + * source code with only those rights set forth herein. + * + * Any use of this source code in individual and commercial software must + * include, in the user documentation and internal comments to the code, + * the above Disclaimer and U.S. Government End Users Notice. + */ + +/* +NVML API Reference + +The NVIDIA Management Library (NVML) is a C-based programmatic interface for monitoring and +managing various states within NVIDIA Tesla &tm; GPUs. It is intended to be a platform for building +3rd party applications, and is also the underlying library for the NVIDIA-supported nvidia-smi +tool. NVML is thread-safe so it is safe to make simultaneous NVML calls from multiple threads. + +API Documentation + +Supported platforms: +- Windows: Windows Server 2008 R2 64bit, Windows Server 2012 R2 64bit, Windows 7 64bit, Windows 8 64bit, Windows 10 64bit +- Linux: 32-bit and 64-bit +- Hypervisors: Windows Server 2008R2/2012 Hyper-V 64bit, Citrix XenServer 6.2 SP1+, VMware ESX 5.1/5.5 + +Supported products: +- Full Support + - All Tesla products, starting with the Fermi architecture + - All Quadro products, starting with the Fermi architecture + - All GRID products, starting with the Kepler architecture + - Selected GeForce Titan products +- Limited Support + - All Geforce products, starting with the Fermi architecture + +The NVML library can be found at \%ProgramW6432\%\\"NVIDIA Corporation"\\NVSMI\\ on Windows. It is +not be added to the system path by default. To dynamically link to NVML, add this path to the PATH +environmental variable. To dynamically load NVML, call LoadLibrary with this path. + +On Linux the NVML library will be found on the standard library path. For 64 bit Linux, both the 32 bit +and 64 bit NVML libraries will be installed. + +Online documentation for this library is available at http://docs.nvidia.com/deploy/nvml-api/index.html +*/ + +#ifndef __nvml_nvml_h__ +#define __nvml_nvml_h__ + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * On Windows, set up methods for DLL export + * define NVML_STATIC_IMPORT when using nvml_loader library + */ +#if defined _WINDOWS + #if !defined NVML_STATIC_IMPORT + #if defined NVML_LIB_EXPORT + #define DECLDIR __declspec(dllexport) + #else + #define DECLDIR __declspec(dllimport) + #endif + #else + #define DECLDIR + #endif +#else + #define DECLDIR +#endif + +/** + * NVML API versioning support + */ +#define NVML_API_VERSION 8 +#define NVML_API_VERSION_STR "8" +#define nvmlInit nvmlInit_v2 +#define nvmlDeviceGetPciInfo nvmlDeviceGetPciInfo_v2 +#define nvmlDeviceGetCount nvmlDeviceGetCount_v2 +#define nvmlDeviceGetHandleByIndex nvmlDeviceGetHandleByIndex_v2 +#define nvmlDeviceGetHandleByPciBusId nvmlDeviceGetHandleByPciBusId_v2 + +/***************************************************************************************************/ +/** @defgroup nvmlDeviceStructs Device Structs + * @{ + */ +/***************************************************************************************************/ + +/** + * Special constant that some fields take when they are not available. + * Used when only part of the struct is not available. + * + * Each structure explicitly states when to check for this value. + */ +#define NVML_VALUE_NOT_AVAILABLE (-1) + +typedef struct nvmlDevice_st* nvmlDevice_t; + +/** + * Buffer size guaranteed to be large enough for pci bus id + */ +#define NVML_DEVICE_PCI_BUS_ID_BUFFER_SIZE 16 + +/** + * PCI information about a GPU device. + */ +typedef struct nvmlPciInfo_st +{ + char busId[NVML_DEVICE_PCI_BUS_ID_BUFFER_SIZE]; //!< The tuple domain:bus:device.function PCI identifier (& NULL terminator) + unsigned int domain; //!< The PCI domain on which the device's bus resides, 0 to 0xffff + unsigned int bus; //!< The bus on which the device resides, 0 to 0xff + unsigned int device; //!< The device's id on the bus, 0 to 31 + unsigned int pciDeviceId; //!< The combined 16-bit device id and 16-bit vendor id + + // Added in NVML 2.285 API + unsigned int pciSubSystemId; //!< The 32-bit Sub System Device ID + + // NVIDIA reserved for internal use only + unsigned int reserved0; + unsigned int reserved1; + unsigned int reserved2; + unsigned int reserved3; +} nvmlPciInfo_t; + +/** + * Detailed ECC error counts for a device. + * + * @deprecated Different GPU families can have different memory error counters + * See \ref nvmlDeviceGetMemoryErrorCounter + */ +typedef struct nvmlEccErrorCounts_st +{ + unsigned long long l1Cache; //!< L1 cache errors + unsigned long long l2Cache; //!< L2 cache errors + unsigned long long deviceMemory; //!< Device memory errors + unsigned long long registerFile; //!< Register file errors +} nvmlEccErrorCounts_t; + +/** + * Utilization information for a device. + * Each sample period may be between 1 second and 1/6 second, depending on the product being queried. + */ +typedef struct nvmlUtilization_st +{ + unsigned int gpu; //!< Percent of time over the past sample period during which one or more kernels was executing on the GPU + unsigned int memory; //!< Percent of time over the past sample period during which global (device) memory was being read or written +} nvmlUtilization_t; + +/** + * Memory allocation information for a device. + */ +typedef struct nvmlMemory_st +{ + unsigned long long total; //!< Total installed FB memory (in bytes) + unsigned long long free; //!< Unallocated FB memory (in bytes) + unsigned long long used; //!< Allocated FB memory (in bytes). Note that the driver/GPU always sets aside a small amount of memory for bookkeeping +} nvmlMemory_t; + +/** + * BAR1 Memory allocation Information for a device + */ +typedef struct nvmlBAR1Memory_st +{ + unsigned long long bar1Total; //!< Total BAR1 Memory (in bytes) + unsigned long long bar1Free; //!< Unallocated BAR1 Memory (in bytes) + unsigned long long bar1Used; //!< Allocated Used Memory (in bytes) +}nvmlBAR1Memory_t; + +/** + * Information about running compute processes on the GPU + */ +typedef struct nvmlProcessInfo_st +{ + unsigned int pid; //!< Process ID + unsigned long long usedGpuMemory; //!< Amount of used GPU memory in bytes. + //! Under WDDM, \ref NVML_VALUE_NOT_AVAILABLE is always reported + //! because Windows KMD manages all the memory and not the NVIDIA driver +} nvmlProcessInfo_t; + + +/** + * Enum to represent type of bridge chip + */ +typedef enum nvmlBridgeChipType_enum +{ + NVML_BRIDGE_CHIP_PLX = 0, + NVML_BRIDGE_CHIP_BRO4 = 1 +}nvmlBridgeChipType_t; + +/** + * Maximum number of NvLink links supported + */ +#define NVML_NVLINK_MAX_LINKS 4 + +/** + * Enum to represent the NvLink utilization counter packet units + */ +typedef enum nvmlNvLinkUtilizationCountUnits_enum +{ + NVML_NVLINK_COUNTER_UNIT_CYCLES = 0, // count by cycles + NVML_NVLINK_COUNTER_UNIT_PACKETS = 1, // count by packets + NVML_NVLINK_COUNTER_UNIT_BYTES = 2, // count by bytes + + // this must be last + NVML_NVLINK_COUNTER_UNIT_COUNT +} nvmlNvLinkUtilizationCountUnits_t; + +/** + * Enum to represent the NvLink utilization counter packet types to count + * ** this is ONLY applicable with the units as packets or bytes + * ** as specified in \a nvmlNvLinkUtilizationCountUnits_t + * ** all packet filter descriptions are target GPU centric + * ** these can be "OR'd" together + */ +typedef enum nvmlNvLinkUtilizationCountPktTypes_enum +{ + NVML_NVLINK_COUNTER_PKTFILTER_NOP = 0x1, // no operation packets + NVML_NVLINK_COUNTER_PKTFILTER_READ = 0x2, // read packets + NVML_NVLINK_COUNTER_PKTFILTER_WRITE = 0x4, // write packets + NVML_NVLINK_COUNTER_PKTFILTER_RATOM = 0x8, // reduction atomic requests + NVML_NVLINK_COUNTER_PKTFILTER_NRATOM = 0x10, // non-reduction atomic requests + NVML_NVLINK_COUNTER_PKTFILTER_FLUSH = 0x20, // flush requests + NVML_NVLINK_COUNTER_PKTFILTER_RESPDATA = 0x40, // responses with data + NVML_NVLINK_COUNTER_PKTFILTER_RESPNODATA = 0x80, // responses without data + NVML_NVLINK_COUNTER_PKTFILTER_ALL = 0xFF // all packets +} nvmlNvLinkUtilizationCountPktTypes_t; + +/** + * Struct to define the NVLINK counter controls + */ +typedef struct nvmlNvLinkUtilizationControl_st +{ + nvmlNvLinkUtilizationCountUnits_t units; + nvmlNvLinkUtilizationCountPktTypes_t pktfilter; +} nvmlNvLinkUtilizationControl_t; + +/** + * Enum to represent NvLink queryable capabilities + */ +typedef enum nvmlNvLinkCapability_enum +{ + NVML_NVLINK_CAP_P2P_SUPPORTED = 0, // P2P over NVLink is supported + NVML_NVLINK_CAP_SYSMEM_ACCESS = 1, // Access to system memory is supported + NVML_NVLINK_CAP_P2P_ATOMICS = 2, // P2P atomics are supported + NVML_NVLINK_CAP_SYSMEM_ATOMICS= 3, // System memory atomics are supported + NVML_NVLINK_CAP_SLI_BRIDGE = 4, // SLI is supported over this link + NVML_NVLINK_CAP_VALID = 5, // Link is supported on this device + // should be last + NVML_NVLINK_CAP_COUNT +} nvmlNvLinkCapability_t; + +/** + * Enum to represent NvLink queryable error counters + */ +typedef enum nvmlNvLinkErrorCounter_enum +{ + NVML_NVLINK_ERROR_DL_REPLAY = 0, // Data link transmit replay error counter + NVML_NVLINK_ERROR_DL_RECOVERY = 1, // Data link transmit recovery error counter + NVML_NVLINK_ERROR_DL_CRC_FLIT = 2, // Data link receive flow control digit CRC error counter + NVML_NVLINK_ERROR_DL_CRC_DATA = 3, // Data link receive data CRC error counter + + // this must be last + NVML_NVLINK_ERROR_COUNT +} nvmlNvLinkErrorCounter_t; + +/** + * Represents level relationships within a system between two GPUs + * The enums are spaced to allow for future relationships + */ +typedef enum nvmlGpuLevel_enum +{ + NVML_TOPOLOGY_INTERNAL = 0, // e.g. Tesla K80 + NVML_TOPOLOGY_SINGLE = 10, // all devices that only need traverse a single PCIe switch + NVML_TOPOLOGY_MULTIPLE = 20, // all devices that need not traverse a host bridge + NVML_TOPOLOGY_HOSTBRIDGE = 30, // all devices that are connected to the same host bridge + NVML_TOPOLOGY_CPU = 40, // all devices that are connected to the same CPU but possibly multiple host bridges + NVML_TOPOLOGY_SYSTEM = 50, // all devices in the system + + // there is purposefully no COUNT here because of the need for spacing above +} nvmlGpuTopologyLevel_t; + +/* P2P Capability Index Status*/ +typedef enum nvmlGpuP2PStatus_enum +{ + NVML_P2P_STATUS_OK = 0, + NVML_P2P_STATUS_CHIPSET_NOT_SUPPORED, + NVML_P2P_STATUS_GPU_NOT_SUPPORTED, + NVML_P2P_STATUS_IOH_TOPOLOGY_NOT_SUPPORTED, + NVML_P2P_STATUS_DISABLED_BY_REGKEY, + NVML_P2P_STATUS_NOT_SUPPORTED, + NVML_P2P_STATUS_UNKNOWN + +} nvmlGpuP2PStatus_t; + +/* P2P Capability Index*/ +typedef enum nvmlGpuP2PCapsIndex_enum +{ + NVML_P2P_CAPS_INDEX_READ = 0, + NVML_P2P_CAPS_INDEX_WRITE, + NVML_P2P_CAPS_INDEX_NVLINK, + NVML_P2P_CAPS_INDEX_ATOMICS, + NVML_P2P_CAPS_INDEX_PROP, + NVML_P2P_CAPS_INDEX_UNKNOWN +}nvmlGpuP2PCapsIndex_t; + +/** + * Maximum limit on Physical Bridges per Board + */ +#define NVML_MAX_PHYSICAL_BRIDGE (128) + +/** + * Information about the Bridge Chip Firmware + */ +typedef struct nvmlBridgeChipInfo_st +{ + nvmlBridgeChipType_t type; //!< Type of Bridge Chip + unsigned int fwVersion; //!< Firmware Version. 0=Version is unavailable +}nvmlBridgeChipInfo_t; + +/** + * This structure stores the complete Hierarchy of the Bridge Chip within the board. The immediate + * bridge is stored at index 0 of bridgeInfoList, parent to immediate bridge is at index 1 and so forth. + */ +typedef struct nvmlBridgeChipHierarchy_st +{ + unsigned char bridgeCount; //!< Number of Bridge Chips on the Board + nvmlBridgeChipInfo_t bridgeChipInfo[NVML_MAX_PHYSICAL_BRIDGE]; //!< Hierarchy of Bridge Chips on the board +}nvmlBridgeChipHierarchy_t; + +/** + * Represents Type of Sampling Event + */ +typedef enum nvmlSamplingType_enum +{ + NVML_TOTAL_POWER_SAMPLES = 0, //!< To represent total power drawn by GPU + NVML_GPU_UTILIZATION_SAMPLES = 1, //!< To represent percent of time during which one or more kernels was executing on the GPU + NVML_MEMORY_UTILIZATION_SAMPLES = 2, //!< To represent percent of time during which global (device) memory was being read or written + NVML_ENC_UTILIZATION_SAMPLES = 3, //!< To represent percent of time during which NVENC remains busy + NVML_DEC_UTILIZATION_SAMPLES = 4, //!< To represent percent of time during which NVDEC remains busy + NVML_PROCESSOR_CLK_SAMPLES = 5, //!< To represent processor clock samples + NVML_MEMORY_CLK_SAMPLES = 6, //!< To represent memory clock samples + + // Keep this last + NVML_SAMPLINGTYPE_COUNT +}nvmlSamplingType_t; + +/** + * Represents the queryable PCIe utilization counters + */ +typedef enum nvmlPcieUtilCounter_enum +{ + NVML_PCIE_UTIL_TX_BYTES = 0, // 1KB granularity + NVML_PCIE_UTIL_RX_BYTES = 1, // 1KB granularity + + // Keep this last + NVML_PCIE_UTIL_COUNT +} nvmlPcieUtilCounter_t; + +/** + * Represents the type for sample value returned + */ +typedef enum nvmlValueType_enum +{ + NVML_VALUE_TYPE_DOUBLE = 0, + NVML_VALUE_TYPE_UNSIGNED_INT = 1, + NVML_VALUE_TYPE_UNSIGNED_LONG = 2, + NVML_VALUE_TYPE_UNSIGNED_LONG_LONG = 3, + + // Keep this last + NVML_VALUE_TYPE_COUNT +}nvmlValueType_t; + + +/** + * Union to represent different types of Value + */ +typedef union nvmlValue_st +{ + double dVal; //!< If the value is double + unsigned int uiVal; //!< If the value is unsigned int + unsigned long ulVal; //!< If the value is unsigned long + unsigned long long ullVal; //!< If the value is unsigned long long +}nvmlValue_t; + +/** + * Information for Sample + */ +typedef struct nvmlSample_st +{ + unsigned long long timeStamp; //!< CPU Timestamp in microseconds + nvmlValue_t sampleValue; //!< Sample Value +}nvmlSample_t; + +/** + * Represents type of perf policy for which violation times can be queried + */ +typedef enum nvmlPerfPolicyType_enum +{ + NVML_PERF_POLICY_POWER = 0, + NVML_PERF_POLICY_THERMAL = 1, + NVML_PERF_POLICY_SYNC_BOOST = 2, + + // Keep this last + NVML_PERF_POLICY_COUNT +}nvmlPerfPolicyType_t; + +/** + * Struct to hold perf policy violation status data + */ +typedef struct nvmlViolationTime_st +{ + unsigned long long referenceTime; //!< referenceTime represents CPU timestamp in microseconds + unsigned long long violationTime; //!< violationTime in Nanoseconds +}nvmlViolationTime_t; + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlDeviceEnumvs Device Enums + * @{ + */ +/***************************************************************************************************/ + +/** + * Generic enable/disable enum. + */ +typedef enum nvmlEnableState_enum +{ + NVML_FEATURE_DISABLED = 0, //!< Feature disabled + NVML_FEATURE_ENABLED = 1 //!< Feature enabled +} nvmlEnableState_t; + +//! Generic flag used to specify the default behavior of some functions. See description of particular functions for details. +#define nvmlFlagDefault 0x00 +//! Generic flag used to force some behavior. See description of particular functions for details. +#define nvmlFlagForce 0x01 + +/** + * * The Brand of the GPU + * */ +typedef enum nvmlBrandType_enum +{ + NVML_BRAND_UNKNOWN = 0, + NVML_BRAND_QUADRO = 1, + NVML_BRAND_TESLA = 2, + NVML_BRAND_NVS = 3, + NVML_BRAND_GRID = 4, + NVML_BRAND_GEFORCE = 5, + + // Keep this last + NVML_BRAND_COUNT +} nvmlBrandType_t; + +/** + * Temperature thresholds. + */ +typedef enum nvmlTemperatureThresholds_enum +{ + NVML_TEMPERATURE_THRESHOLD_SHUTDOWN = 0, // Temperature at which the GPU will shut down + // for HW protection + NVML_TEMPERATURE_THRESHOLD_SLOWDOWN = 1, // Temperature at which the GPU will begin slowdown + // Keep this last + NVML_TEMPERATURE_THRESHOLD_COUNT +} nvmlTemperatureThresholds_t; + +/** + * Temperature sensors. + */ +typedef enum nvmlTemperatureSensors_enum +{ + NVML_TEMPERATURE_GPU = 0, //!< Temperature sensor for the GPU die + + // Keep this last + NVML_TEMPERATURE_COUNT +} nvmlTemperatureSensors_t; + +/** + * Compute mode. + * + * NVML_COMPUTEMODE_EXCLUSIVE_PROCESS was added in CUDA 4.0. + * Earlier CUDA versions supported a single exclusive mode, + * which is equivalent to NVML_COMPUTEMODE_EXCLUSIVE_THREAD in CUDA 4.0 and beyond. + */ +typedef enum nvmlComputeMode_enum +{ + NVML_COMPUTEMODE_DEFAULT = 0, //!< Default compute mode -- multiple contexts per device + NVML_COMPUTEMODE_EXCLUSIVE_THREAD = 1, //!< Support Removed + NVML_COMPUTEMODE_PROHIBITED = 2, //!< Compute-prohibited mode -- no contexts per device + NVML_COMPUTEMODE_EXCLUSIVE_PROCESS = 3, //!< Compute-exclusive-process mode -- only one context per device, usable from multiple threads at a time + + // Keep this last + NVML_COMPUTEMODE_COUNT +} nvmlComputeMode_t; + +/** + * ECC bit types. + * + * @deprecated See \ref nvmlMemoryErrorType_t for a more flexible type + */ +#define nvmlEccBitType_t nvmlMemoryErrorType_t + +/** + * Single bit ECC errors + * + * @deprecated Mapped to \ref NVML_MEMORY_ERROR_TYPE_CORRECTED + */ +#define NVML_SINGLE_BIT_ECC NVML_MEMORY_ERROR_TYPE_CORRECTED + +/** + * Double bit ECC errors + * + * @deprecated Mapped to \ref NVML_MEMORY_ERROR_TYPE_UNCORRECTED + */ +#define NVML_DOUBLE_BIT_ECC NVML_MEMORY_ERROR_TYPE_UNCORRECTED + +/** + * Memory error types + */ +typedef enum nvmlMemoryErrorType_enum +{ + /** + * A memory error that was corrected + * + * For ECC errors, these are single bit errors + * For Texture memory, these are errors fixed by resend + */ + NVML_MEMORY_ERROR_TYPE_CORRECTED = 0, + /** + * A memory error that was not corrected + * + * For ECC errors, these are double bit errors + * For Texture memory, these are errors where the resend fails + */ + NVML_MEMORY_ERROR_TYPE_UNCORRECTED = 1, + + + // Keep this last + NVML_MEMORY_ERROR_TYPE_COUNT //!< Count of memory error types + +} nvmlMemoryErrorType_t; + +/** + * ECC counter types. + * + * Note: Volatile counts are reset each time the driver loads. On Windows this is once per boot. On Linux this can be more frequent. + * On Linux the driver unloads when no active clients exist. If persistence mode is enabled or there is always a driver + * client active (e.g. X11), then Linux also sees per-boot behavior. If not, volatile counts are reset each time a compute app + * is run. + */ +typedef enum nvmlEccCounterType_enum +{ + NVML_VOLATILE_ECC = 0, //!< Volatile counts are reset each time the driver loads. + NVML_AGGREGATE_ECC = 1, //!< Aggregate counts persist across reboots (i.e. for the lifetime of the device) + + // Keep this last + NVML_ECC_COUNTER_TYPE_COUNT //!< Count of memory counter types +} nvmlEccCounterType_t; + +/** + * Clock types. + * + * All speeds are in Mhz. + */ +typedef enum nvmlClockType_enum +{ + NVML_CLOCK_GRAPHICS = 0, //!< Graphics clock domain + NVML_CLOCK_SM = 1, //!< SM clock domain + NVML_CLOCK_MEM = 2, //!< Memory clock domain + NVML_CLOCK_VIDEO = 3, //!< Video encoder/decoder clock domain + + // Keep this last + NVML_CLOCK_COUNT //usedGpuMemory is not supported + + + unsigned long long time; //!< Amount of time in ms during which the compute context was active. The time is reported as 0 if + //!< the process is not terminated + + unsigned long long startTime; //!< CPU Timestamp in usec representing start time for the process + + unsigned int isRunning; //!< Flag to represent if the process is running (1 for running, 0 for terminated) + + unsigned int reserved[5]; //!< Reserved for future use +} nvmlAccountingStats_t; + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlInitializationAndCleanup Initialization and Cleanup + * This chapter describes the methods that handle NVML initialization and cleanup. + * It is the user's responsibility to call \ref nvmlInit() before calling any other methods, and + * nvmlShutdown() once NVML is no longer being used. + * @{ + */ +/***************************************************************************************************/ + +/** + * Initialize NVML, but don't initialize any GPUs yet. + * + * \note In NVML 5.319 new nvmlInit_v2 has replaced nvmlInit"_v1" (default in NVML 4.304 and older) that + * did initialize all GPU devices in the system. + * + * This allows NVML to communicate with a GPU + * when other GPUs in the system are unstable or in a bad state. When using this API, GPUs are + * discovered and initialized in nvmlDeviceGetHandleBy* functions instead. + * + * \note To contrast nvmlInit_v2 with nvmlInit"_v1", NVML 4.304 nvmlInit"_v1" will fail when any detected GPU is in + * a bad or unstable state. + * + * For all products. + * + * This method, should be called once before invoking any other methods in the library. + * A reference count of the number of initializations is maintained. Shutdown only occurs + * when the reference count reaches zero. + * + * @return + * - \ref NVML_SUCCESS if NVML has been properly initialized + * - \ref NVML_ERROR_DRIVER_NOT_LOADED if NVIDIA driver is not running + * - \ref NVML_ERROR_NO_PERMISSION if NVML does not have permission to talk to the driver + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlInit(void); + +/** + * Shut down NVML by releasing all GPU resources previously allocated with \ref nvmlInit(). + * + * For all products. + * + * This method should be called after NVML work is done, once for each call to \ref nvmlInit() + * A reference count of the number of initializations is maintained. Shutdown only occurs + * when the reference count reaches zero. For backwards compatibility, no error is reported if + * nvmlShutdown() is called more times than nvmlInit(). + * + * @return + * - \ref NVML_SUCCESS if NVML has been properly shut down + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlShutdown(void); + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlErrorReporting Error reporting + * This chapter describes helper functions for error reporting routines. + * @{ + */ +/***************************************************************************************************/ + +/** + * Helper method for converting NVML error codes into readable strings. + * + * For all products. + * + * @param result NVML error code to convert + * + * @return String representation of the error. + * + */ +const DECLDIR char* nvmlErrorString(nvmlReturn_t result); +/** @} */ + + +/***************************************************************************************************/ +/** @defgroup nvmlConstants Constants + * @{ + */ +/***************************************************************************************************/ + +/** + * Buffer size guaranteed to be large enough for \ref nvmlDeviceGetInforomVersion and \ref nvmlDeviceGetInforomImageVersion + */ +#define NVML_DEVICE_INFOROM_VERSION_BUFFER_SIZE 16 + +/** + * Buffer size guaranteed to be large enough for \ref nvmlDeviceGetUUID + */ +#define NVML_DEVICE_UUID_BUFFER_SIZE 80 + +/** + * Buffer size guaranteed to be large enough for \ref nvmlDeviceGetBoardPartNumber + */ +#define NVML_DEVICE_PART_NUMBER_BUFFER_SIZE 80 + +/** + * Buffer size guaranteed to be large enough for \ref nvmlSystemGetDriverVersion + */ +#define NVML_SYSTEM_DRIVER_VERSION_BUFFER_SIZE 80 + +/** + * Buffer size guaranteed to be large enough for \ref nvmlSystemGetNVMLVersion + */ +#define NVML_SYSTEM_NVML_VERSION_BUFFER_SIZE 80 + +/** + * Buffer size guaranteed to be large enough for \ref nvmlDeviceGetName + */ +#define NVML_DEVICE_NAME_BUFFER_SIZE 64 + +/** + * Buffer size guaranteed to be large enough for \ref nvmlDeviceGetSerial + */ +#define NVML_DEVICE_SERIAL_BUFFER_SIZE 30 + +/** + * Buffer size guaranteed to be large enough for \ref nvmlDeviceGetVbiosVersion + */ +#define NVML_DEVICE_VBIOS_VERSION_BUFFER_SIZE 32 + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlSystemQueries System Queries + * This chapter describes the queries that NVML can perform against the local system. These queries + * are not device-specific. + * @{ + */ +/***************************************************************************************************/ + +/** + * Retrieves the version of the system's graphics driver. + * + * For all products. + * + * The version identifier is an alphanumeric string. It will not exceed 80 characters in length + * (including the NULL terminator). See \ref nvmlConstants::NVML_SYSTEM_DRIVER_VERSION_BUFFER_SIZE. + * + * @param version Reference in which to return the version identifier + * @param length The maximum allowed length of the string returned in \a version + * + * @return + * - \ref NVML_SUCCESS if \a version has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a version is NULL + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a length is too small + */ +nvmlReturn_t DECLDIR nvmlSystemGetDriverVersion(char *version, unsigned int length); + +/** + * Retrieves the version of the NVML library. + * + * For all products. + * + * The version identifier is an alphanumeric string. It will not exceed 80 characters in length + * (including the NULL terminator). See \ref nvmlConstants::NVML_SYSTEM_NVML_VERSION_BUFFER_SIZE. + * + * @param version Reference in which to return the version identifier + * @param length The maximum allowed length of the string returned in \a version + * + * @return + * - \ref NVML_SUCCESS if \a version has been set + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a version is NULL + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a length is too small + */ +nvmlReturn_t DECLDIR nvmlSystemGetNVMLVersion(char *version, unsigned int length); + +/** + * Gets name of the process with provided process id + * + * For all products. + * + * Returned process name is cropped to provided length. + * name string is encoded in ANSI. + * + * @param pid The identifier of the process + * @param name Reference in which to return the process name + * @param length The maximum allowed length of the string returned in \a name + * + * @return + * - \ref NVML_SUCCESS if \a name has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a name is NULL or \a length is 0. + * - \ref NVML_ERROR_NOT_FOUND if process doesn't exists + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlSystemGetProcessName(unsigned int pid, char *name, unsigned int length); + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlUnitQueries Unit Queries + * This chapter describes that queries that NVML can perform against each unit. For S-class systems only. + * In each case the device is identified with an nvmlUnit_t handle. This handle is obtained by + * calling \ref nvmlUnitGetHandleByIndex(). + * @{ + */ +/***************************************************************************************************/ + + /** + * Retrieves the number of units in the system. + * + * For S-class products. + * + * @param unitCount Reference in which to return the number of units + * + * @return + * - \ref NVML_SUCCESS if \a unitCount has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a unitCount is NULL + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlUnitGetCount(unsigned int *unitCount); + +/** + * Acquire the handle for a particular unit, based on its index. + * + * For S-class products. + * + * Valid indices are derived from the \a unitCount returned by \ref nvmlUnitGetCount(). + * For example, if \a unitCount is 2 the valid indices are 0 and 1, corresponding to UNIT 0 and UNIT 1. + * + * The order in which NVML enumerates units has no guarantees of consistency between reboots. + * + * @param index The index of the target unit, >= 0 and < \a unitCount + * @param unit Reference in which to return the unit handle + * + * @return + * - \ref NVML_SUCCESS if \a unit has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a index is invalid or \a unit is NULL + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlUnitGetHandleByIndex(unsigned int index, nvmlUnit_t *unit); + +/** + * Retrieves the static information associated with a unit. + * + * For S-class products. + * + * See \ref nvmlUnitInfo_t for details on available unit info. + * + * @param unit The identifier of the target unit + * @param info Reference in which to return the unit information + * + * @return + * - \ref NVML_SUCCESS if \a info has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a unit is invalid or \a info is NULL + */ +nvmlReturn_t DECLDIR nvmlUnitGetUnitInfo(nvmlUnit_t unit, nvmlUnitInfo_t *info); + +/** + * Retrieves the LED state associated with this unit. + * + * For S-class products. + * + * See \ref nvmlLedState_t for details on allowed states. + * + * @param unit The identifier of the target unit + * @param state Reference in which to return the current LED state + * + * @return + * - \ref NVML_SUCCESS if \a state has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a unit is invalid or \a state is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if this is not an S-class product + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlUnitSetLedState() + */ +nvmlReturn_t DECLDIR nvmlUnitGetLedState(nvmlUnit_t unit, nvmlLedState_t *state); + +/** + * Retrieves the PSU stats for the unit. + * + * For S-class products. + * + * See \ref nvmlPSUInfo_t for details on available PSU info. + * + * @param unit The identifier of the target unit + * @param psu Reference in which to return the PSU information + * + * @return + * - \ref NVML_SUCCESS if \a psu has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a unit is invalid or \a psu is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if this is not an S-class product + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlUnitGetPsuInfo(nvmlUnit_t unit, nvmlPSUInfo_t *psu); + +/** + * Retrieves the temperature readings for the unit, in degrees C. + * + * For S-class products. + * + * Depending on the product, readings may be available for intake (type=0), + * exhaust (type=1) and board (type=2). + * + * @param unit The identifier of the target unit + * @param type The type of reading to take + * @param temp Reference in which to return the intake temperature + * + * @return + * - \ref NVML_SUCCESS if \a temp has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a unit or \a type is invalid or \a temp is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if this is not an S-class product + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlUnitGetTemperature(nvmlUnit_t unit, unsigned int type, unsigned int *temp); + +/** + * Retrieves the fan speed readings for the unit. + * + * For S-class products. + * + * See \ref nvmlUnitFanSpeeds_t for details on available fan speed info. + * + * @param unit The identifier of the target unit + * @param fanSpeeds Reference in which to return the fan speed information + * + * @return + * - \ref NVML_SUCCESS if \a fanSpeeds has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a unit is invalid or \a fanSpeeds is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if this is not an S-class product + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlUnitGetFanSpeedInfo(nvmlUnit_t unit, nvmlUnitFanSpeeds_t *fanSpeeds); + +/** + * Retrieves the set of GPU devices that are attached to the specified unit. + * + * For S-class products. + * + * The \a deviceCount argument is expected to be set to the size of the input \a devices array. + * + * @param unit The identifier of the target unit + * @param deviceCount Reference in which to provide the \a devices array size, and + * to return the number of attached GPU devices + * @param devices Reference in which to return the references to the attached GPU devices + * + * @return + * - \ref NVML_SUCCESS if \a deviceCount and \a devices have been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a deviceCount indicates that the \a devices array is too small + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a unit is invalid, either of \a deviceCount or \a devices is NULL + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlUnitGetDevices(nvmlUnit_t unit, unsigned int *deviceCount, nvmlDevice_t *devices); + +/** + * Retrieves the IDs and firmware versions for any Host Interface Cards (HICs) in the system. + * + * For S-class products. + * + * The \a hwbcCount argument is expected to be set to the size of the input \a hwbcEntries array. + * The HIC must be connected to an S-class system for it to be reported by this function. + * + * @param hwbcCount Size of hwbcEntries array + * @param hwbcEntries Array holding information about hwbc + * + * @return + * - \ref NVML_SUCCESS if \a hwbcCount and \a hwbcEntries have been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if either \a hwbcCount or \a hwbcEntries is NULL + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a hwbcCount indicates that the \a hwbcEntries array is too small + */ +nvmlReturn_t DECLDIR nvmlSystemGetHicVersion(unsigned int *hwbcCount, nvmlHwbcEntry_t *hwbcEntries); +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlDeviceQueries Device Queries + * This chapter describes that queries that NVML can perform against each device. + * In each case the device is identified with an nvmlDevice_t handle. This handle is obtained by + * calling one of \ref nvmlDeviceGetHandleByIndex(), \ref nvmlDeviceGetHandleBySerial(), + * \ref nvmlDeviceGetHandleByPciBusId(). or \ref nvmlDeviceGetHandleByUUID(). + * @{ + */ +/***************************************************************************************************/ + + /** + * Retrieves the number of compute devices in the system. A compute device is a single GPU. + * + * For all products. + * + * Note: New nvmlDeviceGetCount_v2 (default in NVML 5.319) returns count of all devices in the system + * even if nvmlDeviceGetHandleByIndex_v2 returns NVML_ERROR_NO_PERMISSION for such device. + * Update your code to handle this error, or use NVML 4.304 or older nvml header file. + * For backward binary compatibility reasons _v1 version of the API is still present in the shared + * library. + * Old _v1 version of nvmlDeviceGetCount doesn't count devices that NVML has no permission to talk to. + * + * @param deviceCount Reference in which to return the number of accessible devices + * + * @return + * - \ref NVML_SUCCESS if \a deviceCount has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a deviceCount is NULL + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetCount(unsigned int *deviceCount); + +/** + * Acquire the handle for a particular device, based on its index. + * + * For all products. + * + * Valid indices are derived from the \a accessibleDevices count returned by + * \ref nvmlDeviceGetCount(). For example, if \a accessibleDevices is 2 the valid indices + * are 0 and 1, corresponding to GPU 0 and GPU 1. + * + * The order in which NVML enumerates devices has no guarantees of consistency between reboots. For that reason it + * is recommended that devices be looked up by their PCI ids or UUID. See + * \ref nvmlDeviceGetHandleByUUID() and \ref nvmlDeviceGetHandleByPciBusId(). + * + * Note: The NVML index may not correlate with other APIs, such as the CUDA device index. + * + * Starting from NVML 5, this API causes NVML to initialize the target GPU + * NVML may initialize additional GPUs if: + * - The target GPU is an SLI slave + * + * Note: New nvmlDeviceGetCount_v2 (default in NVML 5.319) returns count of all devices in the system + * even if nvmlDeviceGetHandleByIndex_v2 returns NVML_ERROR_NO_PERMISSION for such device. + * Update your code to handle this error, or use NVML 4.304 or older nvml header file. + * For backward binary compatibility reasons _v1 version of the API is still present in the shared + * library. + * Old _v1 version of nvmlDeviceGetCount doesn't count devices that NVML has no permission to talk to. + * + * This means that nvmlDeviceGetHandleByIndex_v2 and _v1 can return different devices for the same index. + * If you don't touch macros that map old (_v1) versions to _v2 versions at the top of the file you don't + * need to worry about that. + * + * @param index The index of the target GPU, >= 0 and < \a accessibleDevices + * @param device Reference in which to return the device handle + * + * @return + * - \ref NVML_SUCCESS if \a device has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a index is invalid or \a device is NULL + * - \ref NVML_ERROR_INSUFFICIENT_POWER if any attached devices have improperly attached external power cables + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to talk to this device + * - \ref NVML_ERROR_IRQ_ISSUE if NVIDIA kernel detected an interrupt issue with the attached GPUs + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetIndex + * @see nvmlDeviceGetCount + */ +nvmlReturn_t DECLDIR nvmlDeviceGetHandleByIndex(unsigned int index, nvmlDevice_t *device); + +/** + * Acquire the handle for a particular device, based on its board serial number. + * + * For Fermi &tm; or newer fully supported devices. + * + * This number corresponds to the value printed directly on the board, and to the value returned by + * \ref nvmlDeviceGetSerial(). + * + * @deprecated Since more than one GPU can exist on a single board this function is deprecated in favor + * of \ref nvmlDeviceGetHandleByUUID. + * For dual GPU boards this function will return NVML_ERROR_INVALID_ARGUMENT. + * + * Starting from NVML 5, this API causes NVML to initialize the target GPU + * NVML may initialize additional GPUs as it searches for the target GPU + * + * @param serial The board serial number of the target GPU + * @param device Reference in which to return the device handle + * + * @return + * - \ref NVML_SUCCESS if \a device has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a serial is invalid, \a device is NULL or more than one + * device has the same serial (dual GPU boards) + * - \ref NVML_ERROR_NOT_FOUND if \a serial does not match a valid device on the system + * - \ref NVML_ERROR_INSUFFICIENT_POWER if any attached devices have improperly attached external power cables + * - \ref NVML_ERROR_IRQ_ISSUE if NVIDIA kernel detected an interrupt issue with the attached GPUs + * - \ref NVML_ERROR_GPU_IS_LOST if any GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetSerial + * @see nvmlDeviceGetHandleByUUID + */ +nvmlReturn_t DECLDIR nvmlDeviceGetHandleBySerial(const char *serial, nvmlDevice_t *device); + +/** + * Acquire the handle for a particular device, based on its globally unique immutable UUID associated with each device. + * + * For all products. + * + * @param uuid The UUID of the target GPU + * @param device Reference in which to return the device handle + * + * Starting from NVML 5, this API causes NVML to initialize the target GPU + * NVML may initialize additional GPUs as it searches for the target GPU + * + * @return + * - \ref NVML_SUCCESS if \a device has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a uuid is invalid or \a device is null + * - \ref NVML_ERROR_NOT_FOUND if \a uuid does not match a valid device on the system + * - \ref NVML_ERROR_INSUFFICIENT_POWER if any attached devices have improperly attached external power cables + * - \ref NVML_ERROR_IRQ_ISSUE if NVIDIA kernel detected an interrupt issue with the attached GPUs + * - \ref NVML_ERROR_GPU_IS_LOST if any GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetUUID + */ +nvmlReturn_t DECLDIR nvmlDeviceGetHandleByUUID(const char *uuid, nvmlDevice_t *device); + +/** + * Acquire the handle for a particular device, based on its PCI bus id. + * + * For all products. + * + * This value corresponds to the nvmlPciInfo_t::busId returned by \ref nvmlDeviceGetPciInfo(). + * + * Starting from NVML 5, this API causes NVML to initialize the target GPU + * NVML may initialize additional GPUs if: + * - The target GPU is an SLI slave + * + * \note NVML 4.304 and older version of nvmlDeviceGetHandleByPciBusId"_v1" returns NVML_ERROR_NOT_FOUND + * instead of NVML_ERROR_NO_PERMISSION. + * + * @param pciBusId The PCI bus id of the target GPU + * @param device Reference in which to return the device handle + * + * @return + * - \ref NVML_SUCCESS if \a device has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a pciBusId is invalid or \a device is NULL + * - \ref NVML_ERROR_NOT_FOUND if \a pciBusId does not match a valid device on the system + * - \ref NVML_ERROR_INSUFFICIENT_POWER if the attached device has improperly attached external power cables + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to talk to this device + * - \ref NVML_ERROR_IRQ_ISSUE if NVIDIA kernel detected an interrupt issue with the attached GPUs + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetHandleByPciBusId(const char *pciBusId, nvmlDevice_t *device); + +/** + * Retrieves the name of this device. + * + * For all products. + * + * The name is an alphanumeric string that denotes a particular product, e.g. Tesla &tm; C2070. It will not + * exceed 64 characters in length (including the NULL terminator). See \ref + * nvmlConstants::NVML_DEVICE_NAME_BUFFER_SIZE. + * + * @param device The identifier of the target device + * @param name Reference in which to return the product name + * @param length The maximum allowed length of the string returned in \a name + * + * @return + * - \ref NVML_SUCCESS if \a name has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, or \a name is NULL + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a length is too small + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetName(nvmlDevice_t device, char *name, unsigned int length); + +/** + * Retrieves the brand of this device. + * + * For all products. + * + * The type is a member of \ref nvmlBrandType_t defined above. + * + * @param device The identifier of the target device + * @param type Reference in which to return the product brand type + * + * @return + * - \ref NVML_SUCCESS if \a name has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, or \a type is NULL + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetBrand(nvmlDevice_t device, nvmlBrandType_t *type); + +/** + * Retrieves the NVML index of this device. + * + * For all products. + * + * Valid indices are derived from the \a accessibleDevices count returned by + * \ref nvmlDeviceGetCount(). For example, if \a accessibleDevices is 2 the valid indices + * are 0 and 1, corresponding to GPU 0 and GPU 1. + * + * The order in which NVML enumerates devices has no guarantees of consistency between reboots. For that reason it + * is recommended that devices be looked up by their PCI ids or GPU UUID. See + * \ref nvmlDeviceGetHandleByPciBusId() and \ref nvmlDeviceGetHandleByUUID(). + * + * Note: The NVML index may not correlate with other APIs, such as the CUDA device index. + * + * @param device The identifier of the target device + * @param index Reference in which to return the NVML index of the device + * + * @return + * - \ref NVML_SUCCESS if \a index has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, or \a index is NULL + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetHandleByIndex() + * @see nvmlDeviceGetCount() + */ +nvmlReturn_t DECLDIR nvmlDeviceGetIndex(nvmlDevice_t device, unsigned int *index); + +/** + * Retrieves the globally unique board serial number associated with this device's board. + * + * For all products with an inforom. + * + * The serial number is an alphanumeric string that will not exceed 30 characters (including the NULL terminator). + * This number matches the serial number tag that is physically attached to the board. See \ref + * nvmlConstants::NVML_DEVICE_SERIAL_BUFFER_SIZE. + * + * @param device The identifier of the target device + * @param serial Reference in which to return the board/module serial number + * @param length The maximum allowed length of the string returned in \a serial + * + * @return + * - \ref NVML_SUCCESS if \a serial has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, or \a serial is NULL + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a length is too small + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetSerial(nvmlDevice_t device, char *serial, unsigned int length); + +/** + * Retrieves an array of unsigned ints (sized to cpuSetSize) of bitmasks with the ideal CPU affinity for the device + * For example, if processors 0, 1, 32, and 33 are ideal for the device and cpuSetSize == 2, + * result[0] = 0x3, result[1] = 0x3 + * + * For Kepler &tm; or newer fully supported devices. + * Supported on Linux only. + * + * @param device The identifier of the target device + * @param cpuSetSize The size of the cpuSet array that is safe to access + * @param cpuSet Array reference in which to return a bitmask of CPUs, 64 CPUs per + * unsigned long on 64-bit machines, 32 on 32-bit machines + * + * @return + * - \ref NVML_SUCCESS if \a cpuAffinity has been filled + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, cpuSetSize == 0, or cpuSet is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetCpuAffinity(nvmlDevice_t device, unsigned int cpuSetSize, unsigned long *cpuSet); + +/** + * Sets the ideal affinity for the calling thread and device using the guidelines + * given in nvmlDeviceGetCpuAffinity(). Note, this is a change as of version 8.0. + * Older versions set the affinity for a calling process and all children. + * Currently supports up to 64 processors. + * + * For Kepler &tm; or newer fully supported devices. + * Supported on Linux only. + * + * @param device The identifier of the target device + * + * @return + * - \ref NVML_SUCCESS if the calling process has been successfully bound + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceSetCpuAffinity(nvmlDevice_t device); + +/** + * Clear all affinity bindings for the calling thread. Note, this is a change as of version + * 8.0 as older versions cleared the affinity for a calling process and all children. + * + * For Kepler &tm; or newer fully supported devices. + * Supported on Linux only. + * + * @param device The identifier of the target device + * + * @return + * - \ref NVML_SUCCESS if the calling process has been successfully unbound + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceClearCpuAffinity(nvmlDevice_t device); + +/** + * Retrieve the common ancestor for two devices + * For all products. + * Supported on Linux only. + * + * @param device1 The identifier of the first device + * @param device2 The identifier of the second device + * @param pathInfo A \ref nvmlGpuTopologyLevel_t that gives the path type + * + * @return + * - \ref NVML_SUCCESS if \a pathInfo has been set + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device1, or \a device2 is invalid, or \a pathInfo is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device or OS does not support this feature + * - \ref NVML_ERROR_UNKNOWN an error has occurred in underlying topology discovery + */ +nvmlReturn_t DECLDIR nvmlDeviceGetTopologyCommonAncestor(nvmlDevice_t device1, nvmlDevice_t device2, nvmlGpuTopologyLevel_t *pathInfo); + +/** + * Retrieve the set of GPUs that are nearest to a given device at a specific interconnectivity level + * For all products. + * Supported on Linux only. + * + * @param device The identifier of the first device + * @param level The \ref nvmlGpuTopologyLevel_t level to search for other GPUs + * @param count When zero, is set to the number of matching GPUs such that \a deviceArray + * can be malloc'd. When non-zero, \a deviceArray will be filled with \a count + * number of device handles. + * @param deviceArray An array of device handles for GPUs found at \a level + * + * @return + * - \ref NVML_SUCCESS if \a deviceArray or \a count (if initially zero) has been set + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a level, or \a count is invalid, or \a deviceArray is NULL with a non-zero \a count + * - \ref NVML_ERROR_NOT_SUPPORTED if the device or OS does not support this feature + * - \ref NVML_ERROR_UNKNOWN an error has occurred in underlying topology discovery + */ +nvmlReturn_t DECLDIR nvmlDeviceGetTopologyNearestGpus(nvmlDevice_t device, nvmlGpuTopologyLevel_t level, unsigned int *count, nvmlDevice_t *deviceArray); + +/** + * Retrieve the set of GPUs that have a CPU affinity with the given CPU number + * For all products. + * Supported on Linux only. + * + * @param cpuNumber The CPU number + * @param count When zero, is set to the number of matching GPUs such that \a deviceArray + * can be malloc'd. When non-zero, \a deviceArray will be filled with \a count + * number of device handles. + * @param deviceArray An array of device handles for GPUs found with affinity to \a cpuNumber + * + * @return + * - \ref NVML_SUCCESS if \a deviceArray or \a count (if initially zero) has been set + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a cpuNumber, or \a count is invalid, or \a deviceArray is NULL with a non-zero \a count + * - \ref NVML_ERROR_NOT_SUPPORTED if the device or OS does not support this feature + * - \ref NVML_ERROR_UNKNOWN an error has occurred in underlying topology discovery + */ +nvmlReturn_t DECLDIR nvmlSystemGetTopologyGpuSet(unsigned int cpuNumber, unsigned int *count, nvmlDevice_t *deviceArray); + +/** + * Retrieve the status for a given p2p capability index between a given pair of GPU + * + * @param device1 The first device + * @param device2 The second device + * @param p2pIndex p2p Capability Index being looked for between \a device1 and \a device2 + * @param p2pStatus Reference in which to return the status of the \a p2pIndex + * between \a device1 and \a device2 + * @return + * - \ref NVML_SUCCESS if \a p2pStatus has been populated + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device1 or \a device2 or \a p2pIndex is invalid or \a p2pStatus is NULL + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetP2PStatus(nvmlDevice_t device1, nvmlDevice_t device2, nvmlGpuP2PCapsIndex_t p2pIndex,nvmlGpuP2PStatus_t *p2pStatus); + + +/** + * Retrieves the globally unique immutable UUID associated with this device, as a 5 part hexadecimal string, + * that augments the immutable, board serial identifier. + * + * For all products. + * + * The UUID is a globally unique identifier. It is the only available identifier for pre-Fermi-architecture products. + * It does NOT correspond to any identifier printed on the board. It will not exceed 80 characters in length + * (including the NULL terminator). See \ref nvmlConstants::NVML_DEVICE_UUID_BUFFER_SIZE. + * + * @param device The identifier of the target device + * @param uuid Reference in which to return the GPU UUID + * @param length The maximum allowed length of the string returned in \a uuid + * + * @return + * - \ref NVML_SUCCESS if \a uuid has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, or \a uuid is NULL + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a length is too small + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetUUID(nvmlDevice_t device, char *uuid, unsigned int length); + +/** + * Retrieves minor number for the device. The minor number for the device is such that the Nvidia device node file for + * each GPU will have the form /dev/nvidia[minor number]. + * + * For all products. + * Supported only for Linux + * + * @param device The identifier of the target device + * @param minorNumber Reference in which to return the minor number for the device + * @return + * - \ref NVML_SUCCESS if the minor number is successfully retrieved + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a minorNumber is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if this query is not supported by the device + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetMinorNumber(nvmlDevice_t device, unsigned int *minorNumber); + +/** + * Retrieves the the device board part number which is programmed into the board's InfoROM + * + * For all products. + * + * @param device Identifier of the target device + * @param partNumber Reference to the buffer to return + * @param length Length of the buffer reference + * + * @return + * - \ref NVML_SUCCESS if \a partNumber has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_NOT_SUPPORTED if the needed VBIOS fields have not been filled + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a serial is NULL + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetBoardPartNumber(nvmlDevice_t device, char* partNumber, unsigned int length); + +/** + * Retrieves the version information for the device's infoROM object. + * + * For all products with an inforom. + * + * Fermi and higher parts have non-volatile on-board memory for persisting device info, such as aggregate + * ECC counts. The version of the data structures in this memory may change from time to time. It will not + * exceed 16 characters in length (including the NULL terminator). + * See \ref nvmlConstants::NVML_DEVICE_INFOROM_VERSION_BUFFER_SIZE. + * + * See \ref nvmlInforomObject_t for details on the available infoROM objects. + * + * @param device The identifier of the target device + * @param object The target infoROM object + * @param version Reference in which to return the infoROM version + * @param length The maximum allowed length of the string returned in \a version + * + * @return + * - \ref NVML_SUCCESS if \a version has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a version is NULL + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a length is too small + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not have an infoROM + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetInforomImageVersion + */ +nvmlReturn_t DECLDIR nvmlDeviceGetInforomVersion(nvmlDevice_t device, nvmlInforomObject_t object, char *version, unsigned int length); + +/** + * Retrieves the global infoROM image version + * + * For all products with an inforom. + * + * Image version just like VBIOS version uniquely describes the exact version of the infoROM flashed on the board + * in contrast to infoROM object version which is only an indicator of supported features. + * Version string will not exceed 16 characters in length (including the NULL terminator). + * See \ref nvmlConstants::NVML_DEVICE_INFOROM_VERSION_BUFFER_SIZE. + * + * @param device The identifier of the target device + * @param version Reference in which to return the infoROM image version + * @param length The maximum allowed length of the string returned in \a version + * + * @return + * - \ref NVML_SUCCESS if \a version has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a version is NULL + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a length is too small + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not have an infoROM + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetInforomVersion + */ +nvmlReturn_t DECLDIR nvmlDeviceGetInforomImageVersion(nvmlDevice_t device, char *version, unsigned int length); + +/** + * Retrieves the checksum of the configuration stored in the device's infoROM. + * + * For all products with an inforom. + * + * Can be used to make sure that two GPUs have the exact same configuration. + * Current checksum takes into account configuration stored in PWR and ECC infoROM objects. + * Checksum can change between driver releases or when user changes configuration (e.g. disable/enable ECC) + * + * @param device The identifier of the target device + * @param checksum Reference in which to return the infoROM configuration checksum + * + * @return + * - \ref NVML_SUCCESS if \a checksum has been set + * - \ref NVML_ERROR_CORRUPTED_INFOROM if the device's checksum couldn't be retrieved due to infoROM corruption + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a checksum is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetInforomConfigurationChecksum(nvmlDevice_t device, unsigned int *checksum); + +/** + * Reads the infoROM from the flash and verifies the checksums. + * + * For all products with an inforom. + * + * @param device The identifier of the target device + * + * @return + * - \ref NVML_SUCCESS if infoROM is not corrupted + * - \ref NVML_ERROR_CORRUPTED_INFOROM if the device's infoROM is corrupted + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceValidateInforom(nvmlDevice_t device); + +/** + * Retrieves the display mode for the device. + * + * For all products. + * + * This method indicates whether a physical display (e.g. monitor) is currently connected to + * any of the device's connectors. + * + * See \ref nvmlEnableState_t for details on allowed modes. + * + * @param device The identifier of the target device + * @param display Reference in which to return the display mode + * + * @return + * - \ref NVML_SUCCESS if \a display has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a display is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetDisplayMode(nvmlDevice_t device, nvmlEnableState_t *display); + +/** + * Retrieves the display active state for the device. + * + * For all products. + * + * This method indicates whether a display is initialized on the device. + * For example whether X Server is attached to this device and has allocated memory for the screen. + * + * Display can be active even when no monitor is physically attached. + * + * See \ref nvmlEnableState_t for details on allowed modes. + * + * @param device The identifier of the target device + * @param isActive Reference in which to return the display active state + * + * @return + * - \ref NVML_SUCCESS if \a isActive has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a isActive is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetDisplayActive(nvmlDevice_t device, nvmlEnableState_t *isActive); + +/** + * Retrieves the persistence mode associated with this device. + * + * For all products. + * For Linux only. + * + * When driver persistence mode is enabled the driver software state is not torn down when the last + * client disconnects. By default this feature is disabled. + * + * See \ref nvmlEnableState_t for details on allowed modes. + * + * @param device The identifier of the target device + * @param mode Reference in which to return the current driver persistence mode + * + * @return + * - \ref NVML_SUCCESS if \a mode has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a mode is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceSetPersistenceMode() + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPersistenceMode(nvmlDevice_t device, nvmlEnableState_t *mode); + +/** + * Retrieves the PCI attributes of this device. + * + * For all products. + * + * See \ref nvmlPciInfo_t for details on the available PCI info. + * + * @param device The identifier of the target device + * @param pci Reference in which to return the PCI info + * + * @return + * - \ref NVML_SUCCESS if \a pci has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a pci is NULL + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPciInfo(nvmlDevice_t device, nvmlPciInfo_t *pci); + +/** + * Retrieves the maximum PCIe link generation possible with this device and system + * + * I.E. for a generation 2 PCIe device attached to a generation 1 PCIe bus the max link generation this function will + * report is generation 1. + * + * For Fermi &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param maxLinkGen Reference in which to return the max PCIe link generation + * + * @return + * - \ref NVML_SUCCESS if \a maxLinkGen has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a maxLinkGen is null + * - \ref NVML_ERROR_NOT_SUPPORTED if PCIe link information is not available + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetMaxPcieLinkGeneration(nvmlDevice_t device, unsigned int *maxLinkGen); + +/** + * Retrieves the maximum PCIe link width possible with this device and system + * + * I.E. for a device with a 16x PCIe bus width attached to a 8x PCIe system bus this function will report + * a max link width of 8. + * + * For Fermi &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param maxLinkWidth Reference in which to return the max PCIe link generation + * + * @return + * - \ref NVML_SUCCESS if \a maxLinkWidth has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a maxLinkWidth is null + * - \ref NVML_ERROR_NOT_SUPPORTED if PCIe link information is not available + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetMaxPcieLinkWidth(nvmlDevice_t device, unsigned int *maxLinkWidth); + +/** + * Retrieves the current PCIe link generation + * + * For Fermi &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param currLinkGen Reference in which to return the current PCIe link generation + * + * @return + * - \ref NVML_SUCCESS if \a currLinkGen has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a currLinkGen is null + * - \ref NVML_ERROR_NOT_SUPPORTED if PCIe link information is not available + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetCurrPcieLinkGeneration(nvmlDevice_t device, unsigned int *currLinkGen); + +/** + * Retrieves the current PCIe link width + * + * For Fermi &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param currLinkWidth Reference in which to return the current PCIe link generation + * + * @return + * - \ref NVML_SUCCESS if \a currLinkWidth has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a currLinkWidth is null + * - \ref NVML_ERROR_NOT_SUPPORTED if PCIe link information is not available + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetCurrPcieLinkWidth(nvmlDevice_t device, unsigned int *currLinkWidth); + +/** + * Retrieve PCIe utilization information. + * This function is querying a byte counter over a 20ms interval and thus is the + * PCIe throughput over that interval. + * + * For Maxwell &tm; or newer fully supported devices. + * + * This method is not supported on virtualized GPU environments. + * + * @param device The identifier of the target device + * @param counter The specific counter that should be queried \ref nvmlPcieUtilCounter_t + * @param value Reference in which to return throughput in KB/s + * + * @return + * - \ref NVML_SUCCESS if \a value has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device or \a counter is invalid, or \a value is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPcieThroughput(nvmlDevice_t device, nvmlPcieUtilCounter_t counter, unsigned int *value); + +/** + * Retrieve the PCIe replay counter. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param value Reference in which to return the counter's value + * + * @return + * - \ref NVML_SUCCESS if \a value and \a rollover have been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, or \a value or \a rollover are NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPcieReplayCounter(nvmlDevice_t device, unsigned int *value); + +/** + * Retrieves the current clock speeds for the device. + * + * For Fermi &tm; or newer fully supported devices. + * + * See \ref nvmlClockType_t for details on available clock information. + * + * @param device The identifier of the target device + * @param type Identify which clock domain to query + * @param clock Reference in which to return the clock speed in MHz + * + * @return + * - \ref NVML_SUCCESS if \a clock has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a clock is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device cannot report the specified clock + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetClockInfo(nvmlDevice_t device, nvmlClockType_t type, unsigned int *clock); + +/** + * Retrieves the maximum clock speeds for the device. + * + * For Fermi &tm; or newer fully supported devices. + * + * See \ref nvmlClockType_t for details on available clock information. + * + * \note On GPUs from Fermi family current P0 clocks (reported by \ref nvmlDeviceGetClockInfo) can differ from max clocks + * by few MHz. + * + * @param device The identifier of the target device + * @param type Identify which clock domain to query + * @param clock Reference in which to return the clock speed in MHz + * + * @return + * - \ref NVML_SUCCESS if \a clock has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a clock is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device cannot report the specified clock + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetMaxClockInfo(nvmlDevice_t device, nvmlClockType_t type, unsigned int *clock); + +/** + * Retrieves the current setting of a clock that applications will use unless an overspec situation occurs. + * Can be changed using \ref nvmlDeviceSetApplicationsClocks. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param clockType Identify which clock domain to query + * @param clockMHz Reference in which to return the clock in MHz + * + * @return + * - \ref NVML_SUCCESS if \a clockMHz has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a clockMHz is NULL or \a clockType is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetApplicationsClock(nvmlDevice_t device, nvmlClockType_t clockType, unsigned int *clockMHz); + +/** + * Retrieves the default applications clock that GPU boots with or + * defaults to after \ref nvmlDeviceResetApplicationsClocks call. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param clockType Identify which clock domain to query + * @param clockMHz Reference in which to return the default clock in MHz + * + * @return + * - \ref NVML_SUCCESS if \a clockMHz has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a clockMHz is NULL or \a clockType is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * \see nvmlDeviceGetApplicationsClock + */ +nvmlReturn_t DECLDIR nvmlDeviceGetDefaultApplicationsClock(nvmlDevice_t device, nvmlClockType_t clockType, unsigned int *clockMHz); + +/** + * Resets the application clock to the default value + * + * This is the applications clock that will be used after system reboot or driver reload. + * Default value is constant, but the current value an be changed using \ref nvmlDeviceSetApplicationsClocks. + * + * On Pascal and newer hardware, if clocks were previously locked with \ref nvmlDeviceSetApplicationsClocks, + * this call will unlock clocks. This returns clocks their default behavior ofautomatically boosting above + * base clocks as thermal limits allow. + * + * @see nvmlDeviceGetApplicationsClock + * @see nvmlDeviceSetApplicationsClocks + * + * For Fermi &tm; or newer non-GeForce fully supported devices and Maxwell or newer GeForce devices. + * + * @param device The identifier of the target device + * + * @return + * - \ref NVML_SUCCESS if new settings were successfully set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceResetApplicationsClocks(nvmlDevice_t device); + +/** + * Retrieves the clock speed for the clock specified by the clock type and clock ID. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param clockType Identify which clock domain to query + * @param clockId Identify which clock in the domain to query + * @param clockMHz Reference in which to return the clock in MHz + * + * @return + * - \ref NVML_SUCCESS if \a clockMHz has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a clockMHz is NULL or \a clockType is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetClock(nvmlDevice_t device, nvmlClockType_t clockType, nvmlClockId_t clockId, unsigned int *clockMHz); + +/** + * Retrieves the customer defined maximum boost clock speed specified by the given clock type. + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param clockType Identify which clock domain to query + * @param clockMHz Reference in which to return the clock in MHz + * + * @return + * - \ref NVML_SUCCESS if \a clockMHz has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a clockMHz is NULL or \a clockType is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device or the \a clockType on this device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetMaxCustomerBoostClock(nvmlDevice_t device, nvmlClockType_t clockType, unsigned int *clockMHz); + +/** + * Retrieves the list of possible memory clocks that can be used as an argument for \ref nvmlDeviceSetApplicationsClocks. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param count Reference in which to provide the \a clocksMHz array size, and + * to return the number of elements + * @param clocksMHz Reference in which to return the clock in MHz + * + * @return + * - \ref NVML_SUCCESS if \a count and \a clocksMHz have been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a count is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a count is too small (\a count is set to the number of + * required elements) + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceSetApplicationsClocks + * @see nvmlDeviceGetSupportedGraphicsClocks + */ +nvmlReturn_t DECLDIR nvmlDeviceGetSupportedMemoryClocks(nvmlDevice_t device, unsigned int *count, unsigned int *clocksMHz); + +/** + * Retrieves the list of possible graphics clocks that can be used as an argument for \ref nvmlDeviceSetApplicationsClocks. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param memoryClockMHz Memory clock for which to return possible graphics clocks + * @param count Reference in which to provide the \a clocksMHz array size, and + * to return the number of elements + * @param clocksMHz Reference in which to return the clocks in MHz + * + * @return + * - \ref NVML_SUCCESS if \a count and \a clocksMHz have been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_NOT_FOUND if the specified \a memoryClockMHz is not a supported frequency + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a clock is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a count is too small + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceSetApplicationsClocks + * @see nvmlDeviceGetSupportedMemoryClocks + */ +nvmlReturn_t DECLDIR nvmlDeviceGetSupportedGraphicsClocks(nvmlDevice_t device, unsigned int memoryClockMHz, unsigned int *count, unsigned int *clocksMHz); + +/** + * Retrieve the current state of Auto Boosted clocks on a device and store it in \a isEnabled + * + * For Kepler &tm; or newer fully supported devices. + * + * Auto Boosted clocks are enabled by default on some hardware, allowing the GPU to run at higher clock rates + * to maximize performance as thermal limits allow. + * + * On Pascal and newer hardware, Auto Aoosted clocks are controlled through application clocks. + * Use \ref nvmlDeviceSetApplicationsClocks and \ref nvmlDeviceResetApplicationsClocks to control Auto Boost + * behavior. + * + * @param device The identifier of the target device + * @param isEnabled Where to store the current state of Auto Boosted clocks of the target device + * @param defaultIsEnabled Where to store the default Auto Boosted clocks behavior of the target device that the device will + * revert to when no applications are using the GPU + * + * @return + * - \ref NVML_SUCCESS If \a isEnabled has been been set with the Auto Boosted clocks state of \a device + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a isEnabled is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support Auto Boosted clocks + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + */ +nvmlReturn_t DECLDIR nvmlDeviceGetAutoBoostedClocksEnabled(nvmlDevice_t device, nvmlEnableState_t *isEnabled, nvmlEnableState_t *defaultIsEnabled); + +/** + * Try to set the current state of Auto Boosted clocks on a device. + * + * For Kepler &tm; or newer fully supported devices. + * + * Auto Boosted clocks are enabled by default on some hardware, allowing the GPU to run at higher clock rates + * to maximize performance as thermal limits allow. Auto Boosted clocks should be disabled if fixed clock + * rates are desired. + * + * Non-root users may use this API by default but can be restricted by root from using this API by calling + * \ref nvmlDeviceSetAPIRestriction with apiType=NVML_RESTRICTED_API_SET_AUTO_BOOSTED_CLOCKS. + * Note: Persistence Mode is required to modify current Auto Boost settings, therefore, it must be enabled. + * + * On Pascal and newer hardware, Auto Boosted clocks are controlled through application clocks. + * Use \ref nvmlDeviceSetApplicationsClocks and \ref nvmlDeviceResetApplicationsClocks to control Auto Boost + * behavior. + * + * @param device The identifier of the target device + * @param enabled What state to try to set Auto Boosted clocks of the target device to + * + * @return + * - \ref NVML_SUCCESS If the Auto Boosted clocks were successfully set to the state specified by \a enabled + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support Auto Boosted clocks + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + */ +nvmlReturn_t DECLDIR nvmlDeviceSetAutoBoostedClocksEnabled(nvmlDevice_t device, nvmlEnableState_t enabled); + +/** + * Try to set the default state of Auto Boosted clocks on a device. This is the default state that Auto Boosted clocks will + * return to when no compute running processes (e.g. CUDA application which have an active context) are running + * + * For Kepler &tm; or newer non-GeForce fully supported devices and Maxwell or newer GeForce devices. + * Requires root/admin permissions. + * + * Auto Boosted clocks are enabled by default on some hardware, allowing the GPU to run at higher clock rates + * to maximize performance as thermal limits allow. Auto Boosted clocks should be disabled if fixed clock + * rates are desired. + * + * On Pascal and newer hardware, Auto Boosted clocks are controlled through application clocks. + * Use \ref nvmlDeviceSetApplicationsClocks and \ref nvmlDeviceResetApplicationsClocks to control Auto Boost + * behavior. + * + * @param device The identifier of the target device + * @param enabled What state to try to set default Auto Boosted clocks of the target device to + * @param flags Flags that change the default behavior. Currently Unused. + * + * @return + * - \ref NVML_SUCCESS If the Auto Boosted clock's default state was successfully set to the state specified by \a enabled + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_NO_PERMISSION If the calling user does not have permission to change Auto Boosted clock's default state. + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support Auto Boosted clocks + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + */ +nvmlReturn_t DECLDIR nvmlDeviceSetDefaultAutoBoostedClocksEnabled(nvmlDevice_t device, nvmlEnableState_t enabled, unsigned int flags); + + +/** + * Retrieves the intended operating speed of the device's fan. + * + * Note: The reported speed is the intended fan speed. If the fan is physically blocked and unable to spin, the + * output will not match the actual fan speed. + * + * For all discrete products with dedicated fans. + * + * The fan speed is expressed as a percent of the maximum, i.e. full speed is 100%. + * + * @param device The identifier of the target device + * @param speed Reference in which to return the fan speed percentage + * + * @return + * - \ref NVML_SUCCESS if \a speed has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a speed is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not have a fan + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetFanSpeed(nvmlDevice_t device, unsigned int *speed); + +/** + * Retrieves the current temperature readings for the device, in degrees C. + * + * For all products. + * + * See \ref nvmlTemperatureSensors_t for details on available temperature sensors. + * + * @param device The identifier of the target device + * @param sensorType Flag that indicates which sensor reading to retrieve + * @param temp Reference in which to return the temperature reading + * + * @return + * - \ref NVML_SUCCESS if \a temp has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, \a sensorType is invalid or \a temp is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not have the specified sensor + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetTemperature(nvmlDevice_t device, nvmlTemperatureSensors_t sensorType, unsigned int *temp); + +/** + * Retrieves the temperature threshold for the GPU with the specified threshold type in degrees C. + * + * For Kepler &tm; or newer fully supported devices. + * + * See \ref nvmlTemperatureThresholds_t for details on available temperature thresholds. + * + * @param device The identifier of the target device + * @param thresholdType The type of threshold value queried + * @param temp Reference in which to return the temperature reading + * @return + * - \ref NVML_SUCCESS if \a temp has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, \a thresholdType is invalid or \a temp is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not have a temperature sensor or is unsupported + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetTemperatureThreshold(nvmlDevice_t device, nvmlTemperatureThresholds_t thresholdType, unsigned int *temp); + +/** + * Retrieves the current performance state for the device. + * + * For Fermi &tm; or newer fully supported devices. + * + * See \ref nvmlPstates_t for details on allowed performance states. + * + * @param device The identifier of the target device + * @param pState Reference in which to return the performance state reading + * + * @return + * - \ref NVML_SUCCESS if \a pState has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a pState is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPerformanceState(nvmlDevice_t device, nvmlPstates_t *pState); + +/** + * Retrieves current clocks throttling reasons. + * + * For all fully supported products. + * + * \note More than one bit can be enabled at the same time. Multiple reasons can be affecting clocks at once. + * + * @param device The identifier of the target device + * @param clocksThrottleReasons Reference in which to return bitmask of active clocks throttle + * reasons + * + * @return + * - \ref NVML_SUCCESS if \a clocksThrottleReasons has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a clocksThrottleReasons is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlClocksThrottleReasons + * @see nvmlDeviceGetSupportedClocksThrottleReasons + */ +nvmlReturn_t DECLDIR nvmlDeviceGetCurrentClocksThrottleReasons(nvmlDevice_t device, unsigned long long *clocksThrottleReasons); + +/** + * Retrieves bitmask of supported clocks throttle reasons that can be returned by + * \ref nvmlDeviceGetCurrentClocksThrottleReasons + * + * For all fully supported products. + * + * This method is not supported on virtualized GPU environments. + * + * @param device The identifier of the target device + * @param supportedClocksThrottleReasons Reference in which to return bitmask of supported + * clocks throttle reasons + * + * @return + * - \ref NVML_SUCCESS if \a supportedClocksThrottleReasons has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a supportedClocksThrottleReasons is NULL + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlClocksThrottleReasons + * @see nvmlDeviceGetCurrentClocksThrottleReasons + */ +nvmlReturn_t DECLDIR nvmlDeviceGetSupportedClocksThrottleReasons(nvmlDevice_t device, unsigned long long *supportedClocksThrottleReasons); + +/** + * Deprecated: Use \ref nvmlDeviceGetPerformanceState. This function exposes an incorrect generalization. + * + * Retrieve the current performance state for the device. + * + * For Fermi &tm; or newer fully supported devices. + * + * See \ref nvmlPstates_t for details on allowed performance states. + * + * @param device The identifier of the target device + * @param pState Reference in which to return the performance state reading + * + * @return + * - \ref NVML_SUCCESS if \a pState has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a pState is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPowerState(nvmlDevice_t device, nvmlPstates_t *pState); + +/** + * This API has been deprecated. + * + * Retrieves the power management mode associated with this device. + * + * For products from the Fermi family. + * - Requires \a NVML_INFOROM_POWER version 3.0 or higher. + * + * For from the Kepler or newer families. + * - Does not require \a NVML_INFOROM_POWER object. + * + * This flag indicates whether any power management algorithm is currently active on the device. An + * enabled state does not necessarily mean the device is being actively throttled -- only that + * that the driver will do so if the appropriate conditions are met. + * + * See \ref nvmlEnableState_t for details on allowed modes. + * + * @param device The identifier of the target device + * @param mode Reference in which to return the current power management mode + * + * @return + * - \ref NVML_SUCCESS if \a mode has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a mode is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPowerManagementMode(nvmlDevice_t device, nvmlEnableState_t *mode); + +/** + * Retrieves the power management limit associated with this device. + * + * For Fermi &tm; or newer fully supported devices. + * + * The power limit defines the upper boundary for the card's power draw. If + * the card's total power draw reaches this limit the power management algorithm kicks in. + * + * This reading is only available if power management mode is supported. + * See \ref nvmlDeviceGetPowerManagementMode. + * + * @param device The identifier of the target device + * @param limit Reference in which to return the power management limit in milliwatts + * + * @return + * - \ref NVML_SUCCESS if \a limit has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a limit is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPowerManagementLimit(nvmlDevice_t device, unsigned int *limit); + +/** + * Retrieves information about possible values of power management limits on this device. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param minLimit Reference in which to return the minimum power management limit in milliwatts + * @param maxLimit Reference in which to return the maximum power management limit in milliwatts + * + * @return + * - \ref NVML_SUCCESS if \a minLimit and \a maxLimit have been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a minLimit or \a maxLimit is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceSetPowerManagementLimit + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPowerManagementLimitConstraints(nvmlDevice_t device, unsigned int *minLimit, unsigned int *maxLimit); + +/** + * Retrieves default power management limit on this device, in milliwatts. + * Default power management limit is a power management limit that the device boots with. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param defaultLimit Reference in which to return the default power management limit in milliwatts + * + * @return + * - \ref NVML_SUCCESS if \a defaultLimit has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a defaultLimit is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPowerManagementDefaultLimit(nvmlDevice_t device, unsigned int *defaultLimit); + +/** + * Retrieves power usage for this GPU in milliwatts and its associated circuitry (e.g. memory) + * + * For Fermi &tm; or newer fully supported devices. + * + * On Fermi and Kepler GPUs the reading is accurate to within +/- 5% of current power draw. + * + * It is only available if power management mode is supported. See \ref nvmlDeviceGetPowerManagementMode. + * + * @param device The identifier of the target device + * @param power Reference in which to return the power usage information + * + * @return + * - \ref NVML_SUCCESS if \a power has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a power is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support power readings + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetPowerUsage(nvmlDevice_t device, unsigned int *power); + +/** + * Get the effective power limit that the driver enforces after taking into account all limiters + * + * Note: This can be different from the \ref nvmlDeviceGetPowerManagementLimit if other limits are set elsewhere + * This includes the out of band power limit interface + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The device to communicate with + * @param limit Reference in which to return the power management limit in milliwatts + * + * @return + * - \ref NVML_SUCCESS if \a limit has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a limit is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetEnforcedPowerLimit(nvmlDevice_t device, unsigned int *limit); + +/** + * Retrieves the current GOM and pending GOM (the one that GPU will switch to after reboot). + * + * For GK110 M-class and X-class Tesla &tm; products from the Kepler family. + * Modes \ref NVML_GOM_LOW_DP and \ref NVML_GOM_ALL_ON are supported on fully supported GeForce products. + * Not supported on Quadro ® and Tesla &tm; C-class products. + * + * @param device The identifier of the target device + * @param current Reference in which to return the current GOM + * @param pending Reference in which to return the pending GOM + * + * @return + * - \ref NVML_SUCCESS if \a mode has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a current or \a pending is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlGpuOperationMode_t + * @see nvmlDeviceSetGpuOperationMode + */ +nvmlReturn_t DECLDIR nvmlDeviceGetGpuOperationMode(nvmlDevice_t device, nvmlGpuOperationMode_t *current, nvmlGpuOperationMode_t *pending); + +/** + * Retrieves the amount of used, free and total memory available on the device, in bytes. + * + * For all products. + * + * Enabling ECC reduces the amount of total available memory, due to the extra required parity bits. + * Under WDDM most device memory is allocated and managed on startup by Windows. + * + * Under Linux and Windows TCC, the reported amount of used memory is equal to the sum of memory allocated + * by all active channels on the device. + * + * See \ref nvmlMemory_t for details on available memory info. + * + * @param device The identifier of the target device + * @param memory Reference in which to return the memory information + * + * @return + * - \ref NVML_SUCCESS if \a memory has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a memory is NULL + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetMemoryInfo(nvmlDevice_t device, nvmlMemory_t *memory); + +/** + * Retrieves the current compute mode for the device. + * + * For all products. + * + * See \ref nvmlComputeMode_t for details on allowed compute modes. + * + * @param device The identifier of the target device + * @param mode Reference in which to return the current compute mode + * + * @return + * - \ref NVML_SUCCESS if \a mode has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a mode is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceSetComputeMode() + */ +nvmlReturn_t DECLDIR nvmlDeviceGetComputeMode(nvmlDevice_t device, nvmlComputeMode_t *mode); + +/** + * Retrieves the current and pending ECC modes for the device. + * + * For Fermi &tm; or newer fully supported devices. + * Only applicable to devices with ECC. + * Requires \a NVML_INFOROM_ECC version 1.0 or higher. + * + * Changing ECC modes requires a reboot. The "pending" ECC mode refers to the target mode following + * the next reboot. + * + * See \ref nvmlEnableState_t for details on allowed modes. + * + * @param device The identifier of the target device + * @param current Reference in which to return the current ECC mode + * @param pending Reference in which to return the pending ECC mode + * + * @return + * - \ref NVML_SUCCESS if \a current and \a pending have been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or either \a current or \a pending is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceSetEccMode() + */ +nvmlReturn_t DECLDIR nvmlDeviceGetEccMode(nvmlDevice_t device, nvmlEnableState_t *current, nvmlEnableState_t *pending); + +/** + * Retrieves the device boardId from 0-N. + * Devices with the same boardId indicate GPUs connected to the same PLX. Use in conjunction with + * \ref nvmlDeviceGetMultiGpuBoard() to decide if they are on the same board as well. + * The boardId returned is a unique ID for the current configuration. Uniqueness and ordering across + * reboots and system configurations is not guaranteed (i.e. if a Tesla K40c returns 0x100 and + * the two GPUs on a Tesla K10 in the same system returns 0x200 it is not guaranteed they will + * always return those values but they will always be different from each other). + * + * + * For Fermi &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param boardId Reference in which to return the device's board ID + * + * @return + * - \ref NVML_SUCCESS if \a boardId has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a boardId is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetBoardId(nvmlDevice_t device, unsigned int *boardId); + +/** + * Retrieves whether the device is on a Multi-GPU Board + * Devices that are on multi-GPU boards will set \a multiGpuBool to a non-zero value. + * + * For Fermi &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param multiGpuBool Reference in which to return a zero or non-zero value + * to indicate whether the device is on a multi GPU board + * + * @return + * - \ref NVML_SUCCESS if \a multiGpuBool has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a multiGpuBool is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetMultiGpuBoard(nvmlDevice_t device, unsigned int *multiGpuBool); + +/** + * Retrieves the total ECC error counts for the device. + * + * For Fermi &tm; or newer fully supported devices. + * Only applicable to devices with ECC. + * Requires \a NVML_INFOROM_ECC version 1.0 or higher. + * Requires ECC Mode to be enabled. + * + * The total error count is the sum of errors across each of the separate memory systems, i.e. the total set of + * errors across the entire device. + * + * See \ref nvmlMemoryErrorType_t for a description of available error types.\n + * See \ref nvmlEccCounterType_t for a description of available counter types. + * + * @param device The identifier of the target device + * @param errorType Flag that specifies the type of the errors. + * @param counterType Flag that specifies the counter-type of the errors. + * @param eccCounts Reference in which to return the specified ECC errors + * + * @return + * - \ref NVML_SUCCESS if \a eccCounts has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a errorType or \a counterType is invalid, or \a eccCounts is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceClearEccErrorCounts() + */ +nvmlReturn_t DECLDIR nvmlDeviceGetTotalEccErrors(nvmlDevice_t device, nvmlMemoryErrorType_t errorType, nvmlEccCounterType_t counterType, unsigned long long *eccCounts); + +/** + * Retrieves the detailed ECC error counts for the device. + * + * @deprecated This API supports only a fixed set of ECC error locations + * On different GPU architectures different locations are supported + * See \ref nvmlDeviceGetMemoryErrorCounter + * + * For Fermi &tm; or newer fully supported devices. + * Only applicable to devices with ECC. + * Requires \a NVML_INFOROM_ECC version 2.0 or higher to report aggregate location-based ECC counts. + * Requires \a NVML_INFOROM_ECC version 1.0 or higher to report all other ECC counts. + * Requires ECC Mode to be enabled. + * + * Detailed errors provide separate ECC counts for specific parts of the memory system. + * + * Reports zero for unsupported ECC error counters when a subset of ECC error counters are supported. + * + * See \ref nvmlMemoryErrorType_t for a description of available bit types.\n + * See \ref nvmlEccCounterType_t for a description of available counter types.\n + * See \ref nvmlEccErrorCounts_t for a description of provided detailed ECC counts. + * + * @param device The identifier of the target device + * @param errorType Flag that specifies the type of the errors. + * @param counterType Flag that specifies the counter-type of the errors. + * @param eccCounts Reference in which to return the specified ECC errors + * + * @return + * - \ref NVML_SUCCESS if \a eccCounts has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a errorType or \a counterType is invalid, or \a eccCounts is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceClearEccErrorCounts() + */ +nvmlReturn_t DECLDIR nvmlDeviceGetDetailedEccErrors(nvmlDevice_t device, nvmlMemoryErrorType_t errorType, nvmlEccCounterType_t counterType, nvmlEccErrorCounts_t *eccCounts); + +/** + * Retrieves the requested memory error counter for the device. + * + * For Fermi &tm; or newer fully supported devices. + * Requires \a NVML_INFOROM_ECC version 2.0 or higher to report aggregate location-based memory error counts. + * Requires \a NVML_INFOROM_ECC version 1.0 or higher to report all other memory error counts. + * + * Only applicable to devices with ECC. + * + * Requires ECC Mode to be enabled. + * + * See \ref nvmlMemoryErrorType_t for a description of available memory error types.\n + * See \ref nvmlEccCounterType_t for a description of available counter types.\n + * See \ref nvmlMemoryLocation_t for a description of available counter locations.\n + * + * @param device The identifier of the target device + * @param errorType Flag that specifies the type of error. + * @param counterType Flag that specifies the counter-type of the errors. + * @param locationType Specifies the location of the counter. + * @param count Reference in which to return the ECC counter + * + * @return + * - \ref NVML_SUCCESS if \a count has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a bitTyp,e \a counterType or \a locationType is + * invalid, or \a count is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support ECC error reporting in the specified memory + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetMemoryErrorCounter(nvmlDevice_t device, nvmlMemoryErrorType_t errorType, + nvmlEccCounterType_t counterType, + nvmlMemoryLocation_t locationType, unsigned long long *count); + +/** + * Retrieves the current utilization rates for the device's major subsystems. + * + * For Fermi &tm; or newer fully supported devices. + * + * See \ref nvmlUtilization_t for details on available utilization rates. + * + * \note During driver initialization when ECC is enabled one can see high GPU and Memory Utilization readings. + * This is caused by ECC Memory Scrubbing mechanism that is performed during driver initialization. + * + * @param device The identifier of the target device + * @param utilization Reference in which to return the utilization information + * + * @return + * - \ref NVML_SUCCESS if \a utilization has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a utilization is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetUtilizationRates(nvmlDevice_t device, nvmlUtilization_t *utilization); + +/** + * Retrieves the current utilization and sampling size in microseconds for the Encoder + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param utilization Reference to an unsigned int for encoder utilization info + * @param samplingPeriodUs Reference to an unsigned int for the sampling period in US + * + * @return + * - \ref NVML_SUCCESS if \a utilization has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, \a utilization is NULL, or \a samplingPeriodUs is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetEncoderUtilization(nvmlDevice_t device, unsigned int *utilization, unsigned int *samplingPeriodUs); + +/** + * Retrieves the current utilization and sampling size in microseconds for the Decoder + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param utilization Reference to an unsigned int for decoder utilization info + * @param samplingPeriodUs Reference to an unsigned int for the sampling period in US + * + * @return + * - \ref NVML_SUCCESS if \a utilization has been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, \a utilization is NULL, or \a samplingPeriodUs is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetDecoderUtilization(nvmlDevice_t device, unsigned int *utilization, unsigned int *samplingPeriodUs); + +/** + * Retrieves the current and pending driver model for the device. + * + * For Fermi &tm; or newer fully supported devices. + * For windows only. + * + * On Windows platforms the device driver can run in either WDDM or WDM (TCC) mode. If a display is attached + * to the device it must run in WDDM mode. TCC mode is preferred if a display is not attached. + * + * See \ref nvmlDriverModel_t for details on available driver models. + * + * @param device The identifier of the target device + * @param current Reference in which to return the current driver model + * @param pending Reference in which to return the pending driver model + * + * @return + * - \ref NVML_SUCCESS if either \a current and/or \a pending have been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or both \a current and \a pending are NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the platform is not windows + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceSetDriverModel() + */ +nvmlReturn_t DECLDIR nvmlDeviceGetDriverModel(nvmlDevice_t device, nvmlDriverModel_t *current, nvmlDriverModel_t *pending); + +/** + * Get VBIOS version of the device. + * + * For all products. + * + * The VBIOS version may change from time to time. It will not exceed 32 characters in length + * (including the NULL terminator). See \ref nvmlConstants::NVML_DEVICE_VBIOS_VERSION_BUFFER_SIZE. + * + * @param device The identifier of the target device + * @param version Reference to which to return the VBIOS version + * @param length The maximum allowed length of the string returned in \a version + * + * @return + * - \ref NVML_SUCCESS if \a version has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, or \a version is NULL + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a length is too small + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetVbiosVersion(nvmlDevice_t device, char *version, unsigned int length); + +/** + * Get Bridge Chip Information for all the bridge chips on the board. + * + * For all fully supported products. + * Only applicable to multi-GPU products. + * + * @param device The identifier of the target device + * @param bridgeHierarchy Reference to the returned bridge chip Hierarchy + * + * @return + * - \ref NVML_SUCCESS if bridge chip exists + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, or \a bridgeInfo is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if bridge chip not supported on the device + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + */ +nvmlReturn_t DECLDIR nvmlDeviceGetBridgeChipInfo(nvmlDevice_t device, nvmlBridgeChipHierarchy_t *bridgeHierarchy); + +/** + * Get information about processes with a compute context on a device + * + * For Fermi &tm; or newer fully supported devices. + * + * This function returns information only about compute running processes (e.g. CUDA application which have + * active context). Any graphics applications (e.g. using OpenGL, DirectX) won't be listed by this function. + * + * To query the current number of running compute processes, call this function with *infoCount = 0. The + * return code will be NVML_ERROR_INSUFFICIENT_SIZE, or NVML_SUCCESS if none are running. For this call + * \a infos is allowed to be NULL. + * + * The usedGpuMemory field returned is all of the memory used by the application. + * + * Keep in mind that information returned by this call is dynamic and the number of elements might change in + * time. Allocate more space for \a infos table in case new compute processes are spawned. + * + * @param device The identifier of the target device + * @param infoCount Reference in which to provide the \a infos array size, and + * to return the number of returned elements + * @param infos Reference in which to return the process information + * + * @return + * - \ref NVML_SUCCESS if \a infoCount and \a infos have been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a infoCount indicates that the \a infos array is too small + * \a infoCount will contain minimal amount of space necessary for + * the call to complete + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, either of \a infoCount or \a infos is NULL + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see \ref nvmlSystemGetProcessName + */ +nvmlReturn_t DECLDIR nvmlDeviceGetComputeRunningProcesses(nvmlDevice_t device, unsigned int *infoCount, nvmlProcessInfo_t *infos); + +/** + * Get information about processes with a graphics context on a device + * + * For Kepler &tm; or newer fully supported devices. + * + * This function returns information only about graphics based processes + * (eg. applications using OpenGL, DirectX) + * + * To query the current number of running graphics processes, call this function with *infoCount = 0. The + * return code will be NVML_ERROR_INSUFFICIENT_SIZE, or NVML_SUCCESS if none are running. For this call + * \a infos is allowed to be NULL. + * + * The usedGpuMemory field returned is all of the memory used by the application. + * + * Keep in mind that information returned by this call is dynamic and the number of elements might change in + * time. Allocate more space for \a infos table in case new graphics processes are spawned. + * + * @param device The identifier of the target device + * @param infoCount Reference in which to provide the \a infos array size, and + * to return the number of returned elements + * @param infos Reference in which to return the process information + * + * @return + * - \ref NVML_SUCCESS if \a infoCount and \a infos have been populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a infoCount indicates that the \a infos array is too small + * \a infoCount will contain minimal amount of space necessary for + * the call to complete + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, either of \a infoCount or \a infos is NULL + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see \ref nvmlSystemGetProcessName + */ +nvmlReturn_t DECLDIR nvmlDeviceGetGraphicsRunningProcesses(nvmlDevice_t device, unsigned int *infoCount, nvmlProcessInfo_t *infos); + +/** + * Check if the GPU devices are on the same physical board. + * + * For all fully supported products. + * + * @param device1 The first GPU device + * @param device2 The second GPU device + * @param onSameBoard Reference in which to return the status. + * Non-zero indicates that the GPUs are on the same board. + * + * @return + * - \ref NVML_SUCCESS if \a onSameBoard has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a dev1 or \a dev2 are invalid or \a onSameBoard is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if this check is not supported by the device + * - \ref NVML_ERROR_GPU_IS_LOST if the either GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceOnSameBoard(nvmlDevice_t device1, nvmlDevice_t device2, int *onSameBoard); + +/** + * Retrieves the root/admin permissions on the target API. See \a nvmlRestrictedAPI_t for the list of supported APIs. + * If an API is restricted only root users can call that API. See \a nvmlDeviceSetAPIRestriction to change current permissions. + * + * For all fully supported products. + * + * @param device The identifier of the target device + * @param apiType Target API type for this operation + * @param isRestricted Reference in which to return the current restriction + * NVML_FEATURE_ENABLED indicates that the API is root-only + * NVML_FEATURE_DISABLED indicates that the API is accessible to all users + * + * @return + * - \ref NVML_SUCCESS if \a isRestricted has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, \a apiType incorrect or \a isRestricted is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if this query is not supported by the device or the device does not support + * the feature that is being queried (E.G. Enabling/disabling Auto Boosted clocks is + * not supported by the device) + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlRestrictedAPI_t + */ +nvmlReturn_t DECLDIR nvmlDeviceGetAPIRestriction(nvmlDevice_t device, nvmlRestrictedAPI_t apiType, nvmlEnableState_t *isRestricted); + +/** + * Gets recent samples for the GPU. + * + * For Kepler &tm; or newer fully supported devices. + * + * Based on type, this method can be used to fetch the power, utilization or clock samples maintained in the buffer by + * the driver. + * + * Power, Utilization and Clock samples are returned as type "unsigned int" for the union nvmlValue_t. + * + * To get the size of samples that user needs to allocate, the method is invoked with samples set to NULL. + * The returned samplesCount will provide the number of samples that can be queried. The user needs to + * allocate the buffer with size as samplesCount * sizeof(nvmlSample_t). + * + * lastSeenTimeStamp represents CPU timestamp in microseconds. Set it to 0 to fetch all the samples maintained by the + * underlying buffer. Set lastSeenTimeStamp to one of the timeStamps retrieved from the date of the previous query + * to get more recent samples. + * + * This method fetches the number of entries which can be accommodated in the provided samples array, and the + * reference samplesCount is updated to indicate how many samples were actually retrieved. The advantage of using this + * method for samples in contrast to polling via existing methods is to get get higher frequency data at lower polling cost. + * + * @param device The identifier for the target device + * @param type Type of sampling event + * @param lastSeenTimeStamp Return only samples with timestamp greater than lastSeenTimeStamp. + * @param sampleValType Output parameter to represent the type of sample value as described in nvmlSampleVal_t + * @param sampleCount Reference to provide the number of elements which can be queried in samples array + * @param samples Reference in which samples are returned + + * @return + * - \ref NVML_SUCCESS if samples are successfully retrieved + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, \a samplesCount is NULL or + * reference to \a sampleCount is 0 for non null \a samples + * - \ref NVML_ERROR_NOT_SUPPORTED if this query is not supported by the device + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_NOT_FOUND if sample entries are not found + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetSamples(nvmlDevice_t device, nvmlSamplingType_t type, unsigned long long lastSeenTimeStamp, + nvmlValueType_t *sampleValType, unsigned int *sampleCount, nvmlSample_t *samples); + +/** + * Gets Total, Available and Used size of BAR1 memory. + * + * BAR1 is used to map the FB (device memory) so that it can be directly accessed by the CPU or by 3rd party + * devices (peer-to-peer on the PCIE bus). + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param bar1Memory Reference in which BAR1 memory + * information is returned. + * + * @return + * - \ref NVML_SUCCESS if BAR1 memory is successfully retrieved + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, \a bar1Memory is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if this query is not supported by the device + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + */ +nvmlReturn_t DECLDIR nvmlDeviceGetBAR1MemoryInfo(nvmlDevice_t device, nvmlBAR1Memory_t *bar1Memory); + + +/** + * Gets the duration of time during which the device was throttled (lower than requested clocks) due to power + * or thermal constraints. + * + * The method is important to users who are tying to understand if their GPUs throttle at any point during their applications. The + * difference in violation times at two different reference times gives the indication of GPU throttling event. + * + * Violation for thermal capping is not supported at this time. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param perfPolicyType Represents Performance policy which can trigger GPU throttling + * @param violTime Reference to which violation time related information is returned + * + * + * @return + * - \ref NVML_SUCCESS if violation time is successfully retrieved + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, \a perfPolicyType is invalid, or \a violTime is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if this query is not supported by the device + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * + */ +nvmlReturn_t DECLDIR nvmlDeviceGetViolationStatus(nvmlDevice_t device, nvmlPerfPolicyType_t perfPolicyType, nvmlViolationTime_t *violTime); + +/** + * @} + */ + +/** @addtogroup nvmlAccountingStats + * @{ + */ + +/** + * Queries the state of per process accounting mode. + * + * For Kepler &tm; or newer fully supported devices. + * + * See \ref nvmlDeviceGetAccountingStats for more details. + * See \ref nvmlDeviceSetAccountingMode + * + * @param device The identifier of the target device + * @param mode Reference in which to return the current accounting mode + * + * @return + * - \ref NVML_SUCCESS if the mode has been successfully retrieved + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a mode are NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetAccountingMode(nvmlDevice_t device, nvmlEnableState_t *mode); + +/** + * Queries process's accounting stats. + * + * For Kepler &tm; or newer fully supported devices. + * + * Accounting stats capture GPU utilization and other statistics across the lifetime of a process. + * Accounting stats can be queried during life time of the process and after its termination. + * The time field in \ref nvmlAccountingStats_t is reported as 0 during the lifetime of the process and + * updated to actual running time after its termination. + * Accounting stats are kept in a circular buffer, newly created processes overwrite information about old + * processes. + * + * See \ref nvmlAccountingStats_t for description of each returned metric. + * List of processes that can be queried can be retrieved from \ref nvmlDeviceGetAccountingPids. + * + * @note Accounting Mode needs to be on. See \ref nvmlDeviceGetAccountingMode. + * @note Only compute and graphics applications stats can be queried. Monitoring applications stats can't be + * queried since they don't contribute to GPU utilization. + * @note In case of pid collision stats of only the latest process (that terminated last) will be reported + * + * @warning On Kepler devices per process statistics are accurate only if there's one process running on a GPU. + * + * @param device The identifier of the target device + * @param pid Process Id of the target process to query stats for + * @param stats Reference in which to return the process's accounting stats + * + * @return + * - \ref NVML_SUCCESS if stats have been successfully retrieved + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a stats are NULL + * - \ref NVML_ERROR_NOT_FOUND if process stats were not found + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature or accounting mode is disabled + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetAccountingBufferSize + */ +nvmlReturn_t DECLDIR nvmlDeviceGetAccountingStats(nvmlDevice_t device, unsigned int pid, nvmlAccountingStats_t *stats); + +/** + * Queries list of processes that can be queried for accounting stats. The list of processes returned + * can be in running or terminated state. + * + * For Kepler &tm; or newer fully supported devices. + * + * To just query the number of processes ready to be queried, call this function with *count = 0 and + * pids=NULL. The return code will be NVML_ERROR_INSUFFICIENT_SIZE, or NVML_SUCCESS if list is empty. + * + * For more details see \ref nvmlDeviceGetAccountingStats. + * + * @note In case of PID collision some processes might not be accessible before the circular buffer is full. + * + * @param device The identifier of the target device + * @param count Reference in which to provide the \a pids array size, and + * to return the number of elements ready to be queried + * @param pids Reference in which to return list of process ids + * + * @return + * - \ref NVML_SUCCESS if pids were successfully retrieved + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a count is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature or accounting mode is disabled + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a count is too small (\a count is set to + * expected value) + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetAccountingBufferSize + */ +nvmlReturn_t DECLDIR nvmlDeviceGetAccountingPids(nvmlDevice_t device, unsigned int *count, unsigned int *pids); + +/** + * Returns the number of processes that the circular buffer with accounting pids can hold. + * + * For Kepler &tm; or newer fully supported devices. + * + * This is the maximum number of processes that accounting information will be stored for before information + * about oldest processes will get overwritten by information about new processes. + * + * @param device The identifier of the target device + * @param bufferSize Reference in which to provide the size (in number of elements) + * of the circular buffer for accounting stats. + * + * @return + * - \ref NVML_SUCCESS if buffer size was successfully retrieved + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a bufferSize is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature or accounting mode is disabled + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetAccountingStats + * @see nvmlDeviceGetAccountingPids + */ +nvmlReturn_t DECLDIR nvmlDeviceGetAccountingBufferSize(nvmlDevice_t device, unsigned int *bufferSize); + +/** @} */ + +/** @addtogroup nvmlDeviceQueries + * @{ + */ + +/** + * Returns the list of retired pages by source, including pages that are pending retirement + * The address information provided from this API is the hardware address of the page that was retired. Note + * that this does not match the virtual address used in CUDA, but will match the address information in XID 63 + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param cause Filter page addresses by cause of retirement + * @param pageCount Reference in which to provide the \a addresses buffer size, and + * to return the number of retired pages that match \a cause + * Set to 0 to query the size without allocating an \a addresses buffer + * @param addresses Buffer to write the page addresses into + * + * @return + * - \ref NVML_SUCCESS if \a pageCount was populated and \a addresses was filled + * - \ref NVML_ERROR_INSUFFICIENT_SIZE if \a pageCount indicates the buffer is not large enough to store all the + * matching page addresses. \a pageCount is set to the needed size. + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid, \a pageCount is NULL, \a cause is invalid, or + * \a addresses is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetRetiredPages(nvmlDevice_t device, nvmlPageRetirementCause_t cause, + unsigned int *pageCount, unsigned long long *addresses); + +/** + * Check if any pages are pending retirement and need a reboot to fully retire. + * + * For Kepler &tm; or newer fully supported devices. + * + * @param device The identifier of the target device + * @param isPending Reference in which to return the pending status + * + * @return + * - \ref NVML_SUCCESS if \a isPending was populated + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a isPending is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetRetiredPagesPendingStatus(nvmlDevice_t device, nvmlEnableState_t *isPending); + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlUnitCommands Unit Commands + * This chapter describes NVML operations that change the state of the unit. For S-class products. + * Each of these requires root/admin access. Non-admin users will see an NVML_ERROR_NO_PERMISSION + * error code when invoking any of these methods. + * @{ + */ +/***************************************************************************************************/ + +/** + * Set the LED state for the unit. The LED can be either green (0) or amber (1). + * + * For S-class products. + * Requires root/admin permissions. + * + * This operation takes effect immediately. + * + * + * Current S-Class products don't provide unique LEDs for each unit. As such, both front + * and back LEDs will be toggled in unison regardless of which unit is specified with this command. + * + * See \ref nvmlLedColor_t for available colors. + * + * @param unit The identifier of the target unit + * @param color The target LED color + * + * @return + * - \ref NVML_SUCCESS if the LED color has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a unit or \a color is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if this is not an S-class product + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlUnitGetLedState() + */ +nvmlReturn_t DECLDIR nvmlUnitSetLedState(nvmlUnit_t unit, nvmlLedColor_t color); + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlDeviceCommands Device Commands + * This chapter describes NVML operations that change the state of the device. + * Each of these requires root/admin access. Non-admin users will see an NVML_ERROR_NO_PERMISSION + * error code when invoking any of these methods. + * @{ + */ +/***************************************************************************************************/ + +/** + * Set the persistence mode for the device. + * + * For all products. + * For Linux only. + * Requires root/admin permissions. + * + * The persistence mode determines whether the GPU driver software is torn down after the last client + * exits. + * + * This operation takes effect immediately. It is not persistent across reboots. After each reboot the + * persistence mode is reset to "Disabled". + * + * See \ref nvmlEnableState_t for available modes. + * + * @param device The identifier of the target device + * @param mode The target persistence mode + * + * @return + * - \ref NVML_SUCCESS if the persistence mode was set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a mode is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetPersistenceMode() + */ +nvmlReturn_t DECLDIR nvmlDeviceSetPersistenceMode(nvmlDevice_t device, nvmlEnableState_t mode); + +/** + * Set the compute mode for the device. + * + * For all products. + * Requires root/admin permissions. + * + * The compute mode determines whether a GPU can be used for compute operations and whether it can + * be shared across contexts. + * + * This operation takes effect immediately. Under Linux it is not persistent across reboots and + * always resets to "Default". Under windows it is persistent. + * + * Under windows compute mode may only be set to DEFAULT when running in WDDM + * + * See \ref nvmlComputeMode_t for details on available compute modes. + * + * @param device The identifier of the target device + * @param mode The target compute mode + * + * @return + * - \ref NVML_SUCCESS if the compute mode was set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a mode is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetComputeMode() + */ +nvmlReturn_t DECLDIR nvmlDeviceSetComputeMode(nvmlDevice_t device, nvmlComputeMode_t mode); + +/** + * Set the ECC mode for the device. + * + * For Kepler &tm; or newer fully supported devices. + * Only applicable to devices with ECC. + * Requires \a NVML_INFOROM_ECC version 1.0 or higher. + * Requires root/admin permissions. + * + * The ECC mode determines whether the GPU enables its ECC support. + * + * This operation takes effect after the next reboot. + * + * See \ref nvmlEnableState_t for details on available modes. + * + * @param device The identifier of the target device + * @param ecc The target ECC mode + * + * @return + * - \ref NVML_SUCCESS if the ECC mode was set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a ecc is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetEccMode() + */ +nvmlReturn_t DECLDIR nvmlDeviceSetEccMode(nvmlDevice_t device, nvmlEnableState_t ecc); + +/** + * Clear the ECC error and other memory error counts for the device. + * + * For Kepler &tm; or newer fully supported devices. + * Only applicable to devices with ECC. + * Requires \a NVML_INFOROM_ECC version 2.0 or higher to clear aggregate location-based ECC counts. + * Requires \a NVML_INFOROM_ECC version 1.0 or higher to clear all other ECC counts. + * Requires root/admin permissions. + * Requires ECC Mode to be enabled. + * + * Sets all of the specified ECC counters to 0, including both detailed and total counts. + * + * This operation takes effect immediately. + * + * See \ref nvmlMemoryErrorType_t for details on available counter types. + * + * @param device The identifier of the target device + * @param counterType Flag that indicates which type of errors should be cleared. + * + * @return + * - \ref NVML_SUCCESS if the error counts were cleared + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a counterType is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see + * - nvmlDeviceGetDetailedEccErrors() + * - nvmlDeviceGetTotalEccErrors() + */ +nvmlReturn_t DECLDIR nvmlDeviceClearEccErrorCounts(nvmlDevice_t device, nvmlEccCounterType_t counterType); + +/** + * Set the driver model for the device. + * + * For Fermi &tm; or newer fully supported devices. + * For windows only. + * Requires root/admin permissions. + * + * On Windows platforms the device driver can run in either WDDM or WDM (TCC) mode. If a display is attached + * to the device it must run in WDDM mode. + * + * It is possible to force the change to WDM (TCC) while the display is still attached with a force flag (nvmlFlagForce). + * This should only be done if the host is subsequently powered down and the display is detached from the device + * before the next reboot. + * + * This operation takes effect after the next reboot. + * + * Windows driver model may only be set to WDDM when running in DEFAULT compute mode. + * + * Change driver model to WDDM is not supported when GPU doesn't support graphics acceleration or + * will not support it after reboot. See \ref nvmlDeviceSetGpuOperationMode. + * + * See \ref nvmlDriverModel_t for details on available driver models. + * See \ref nvmlFlagDefault and \ref nvmlFlagForce + * + * @param device The identifier of the target device + * @param driverModel The target driver model + * @param flags Flags that change the default behavior + * + * @return + * - \ref NVML_SUCCESS if the driver model has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a driverModel is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the platform is not windows or the device does not support this feature + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetDriverModel() + */ +nvmlReturn_t DECLDIR nvmlDeviceSetDriverModel(nvmlDevice_t device, nvmlDriverModel_t driverModel, unsigned int flags); + +/** + * Set clocks that applications will lock to. + * + * Sets the clocks that compute and graphics applications will be running at. + * e.g. CUDA driver requests these clocks during context creation which means this property + * defines clocks at which CUDA applications will be running unless some overspec event + * occurs (e.g. over power, over thermal or external HW brake). + * + * Can be used as a setting to request constant performance. + * + * On Pascal and newer hardware, this will automatically disable automatic boosting of clocks. + * + * On K80 and newer Kepler and Maxwell GPUs, users desiring fixed performance should also call + * \ref nvmlDeviceSetAutoBoostedClocksEnabled to prevent clocks from automatically boosting + * above the clock value being set. + * + * For Kepler &tm; or newer non-GeForce fully supported devices and Maxwell or newer GeForce devices. + * Requires root/admin permissions. + * + * See \ref nvmlDeviceGetSupportedMemoryClocks and \ref nvmlDeviceGetSupportedGraphicsClocks + * for details on how to list available clocks combinations. + * + * After system reboot or driver reload applications clocks go back to their default value. + * See \ref nvmlDeviceResetApplicationsClocks. + * + * @param device The identifier of the target device + * @param memClockMHz Requested memory clock in MHz + * @param graphicsClockMHz Requested graphics clock in MHz + * + * @return + * - \ref NVML_SUCCESS if new settings were successfully set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a memClockMHz and \a graphicsClockMHz + * is not a valid clock combination + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceSetApplicationsClocks(nvmlDevice_t device, unsigned int memClockMHz, unsigned int graphicsClockMHz); + +/** + * Set new power limit of this device. + * + * For Kepler &tm; or newer fully supported devices. + * Requires root/admin permissions. + * + * See \ref nvmlDeviceGetPowerManagementLimitConstraints to check the allowed ranges of values. + * + * \note Limit is not persistent across reboots or driver unloads. + * Enable persistent mode to prevent driver from unloading when no application is using the device. + * + * @param device The identifier of the target device + * @param limit Power management limit in milliwatts to set + * + * @return + * - \ref NVML_SUCCESS if \a limit has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a defaultLimit is out of range + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support this feature + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceGetPowerManagementLimitConstraints + * @see nvmlDeviceGetPowerManagementDefaultLimit + */ +nvmlReturn_t DECLDIR nvmlDeviceSetPowerManagementLimit(nvmlDevice_t device, unsigned int limit); + +/** + * Sets new GOM. See \a nvmlGpuOperationMode_t for details. + * + * For GK110 M-class and X-class Tesla &tm; products from the Kepler family. + * Modes \ref NVML_GOM_LOW_DP and \ref NVML_GOM_ALL_ON are supported on fully supported GeForce products. + * Not supported on Quadro ® and Tesla &tm; C-class products. + * Requires root/admin permissions. + * + * Changing GOMs requires a reboot. + * The reboot requirement might be removed in the future. + * + * Compute only GOMs don't support graphics acceleration. Under windows switching to these GOMs when + * pending driver model is WDDM is not supported. See \ref nvmlDeviceSetDriverModel. + * + * @param device The identifier of the target device + * @param mode Target GOM + * + * @return + * - \ref NVML_SUCCESS if \a mode has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a mode incorrect + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support GOM or specific mode + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlGpuOperationMode_t + * @see nvmlDeviceGetGpuOperationMode + */ +nvmlReturn_t DECLDIR nvmlDeviceSetGpuOperationMode(nvmlDevice_t device, nvmlGpuOperationMode_t mode); + +/** + * Changes the root/admin restructions on certain APIs. See \a nvmlRestrictedAPI_t for the list of supported APIs. + * This method can be used by a root/admin user to give non-root/admin access to certain otherwise-restricted APIs. + * The new setting lasts for the lifetime of the NVIDIA driver; it is not persistent. See \a nvmlDeviceGetAPIRestriction + * to query the current restriction settings. + * + * For Kepler &tm; or newer fully supported devices. + * Requires root/admin permissions. + * + * @param device The identifier of the target device + * @param apiType Target API type for this operation + * @param isRestricted The target restriction + * + * @return + * - \ref NVML_SUCCESS if \a isRestricted has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device is invalid or \a apiType incorrect + * - \ref NVML_ERROR_NOT_SUPPORTED if the device does not support changing API restrictions or the device does not support + * the feature that api restrictions are being set for (E.G. Enabling/disabling auto + * boosted clocks is not supported by the device) + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlRestrictedAPI_t + */ +nvmlReturn_t DECLDIR nvmlDeviceSetAPIRestriction(nvmlDevice_t device, nvmlRestrictedAPI_t apiType, nvmlEnableState_t isRestricted); + +/** + * @} + */ + +/** @addtogroup nvmlAccountingStats + * @{ + */ + +/** + * Enables or disables per process accounting. + * + * For Kepler &tm; or newer fully supported devices. + * Requires root/admin permissions. + * + * @note This setting is not persistent and will default to disabled after driver unloads. + * Enable persistence mode to be sure the setting doesn't switch off to disabled. + * + * @note Enabling accounting mode has no negative impact on the GPU performance. + * + * @note Disabling accounting clears all accounting pids information. + * + * See \ref nvmlDeviceGetAccountingMode + * See \ref nvmlDeviceGetAccountingStats + * See \ref nvmlDeviceClearAccountingPids + * + * @param device The identifier of the target device + * @param mode The target accounting mode + * + * @return + * - \ref NVML_SUCCESS if the new mode has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device or \a mode are invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceSetAccountingMode(nvmlDevice_t device, nvmlEnableState_t mode); + +/** + * Clears accounting information about all processes that have already terminated. + * + * For Kepler &tm; or newer fully supported devices. + * Requires root/admin permissions. + * + * See \ref nvmlDeviceGetAccountingMode + * See \ref nvmlDeviceGetAccountingStats + * See \ref nvmlDeviceSetAccountingMode + * + * @param device The identifier of the target device + * + * @return + * - \ref NVML_SUCCESS if accounting information has been cleared + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device are invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_NO_PERMISSION if the user doesn't have permission to perform this operation + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceClearAccountingPids(nvmlDevice_t device); + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup NvLink NvLink Methods + * This chapter describes methods that NVML can perform on NVLINK enabled devices. + * @{ + */ +/***************************************************************************************************/ + +/** + * Retrieves the state of the device's NvLink for the link specified + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param link Specifies the NvLink link to be queried + * @param isActive \a nvmlEnableState_t where NVML_FEATURE_ENABLED indicates that + * the link is active and NVML_FEATURE_DISABLED indicates it + * is inactive + * + * @return + * - \ref NVML_SUCCESS if \a isActive has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device or \a link is invalid or \a isActive is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetNvLinkState(nvmlDevice_t device, unsigned int link, nvmlEnableState_t *isActive); + +/** + * Retrieves the version of the device's NvLink for the link specified + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param link Specifies the NvLink link to be queried + * @param version Requested NvLink version + * + * @return + * - \ref NVML_SUCCESS if \a version has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device or \a link is invalid or \a version is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetNvLinkVersion(nvmlDevice_t device, unsigned int link, unsigned int *version); + +/** + * Retrieves the requested capability from the device's NvLink for the link specified + * Please refer to the \a nvmlNvLinkCapability_t structure for the specific caps that can be queried + * The return value should be treated as a boolean. + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param link Specifies the NvLink link to be queried + * @param capability Specifies the \a nvmlNvLinkCapability_t to be queried + * @param capResult A boolean for the queried capability indicating that feature is available + * + * @return + * - \ref NVML_SUCCESS if \a capResult has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a link, or \a capability is invalid or \a capResult is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetNvLinkCapability(nvmlDevice_t device, unsigned int link, + nvmlNvLinkCapability_t capability, unsigned int *capResult); + +/** + * Retrieves the PCI information for the remote node on a NvLink link + * Note: pciSubSystemId is not filled in this function and is indeterminate + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param link Specifies the NvLink link to be queried + * @param pci \a nvmlPciInfo_t of the remote node for the specified link + * + * @return + * - \ref NVML_SUCCESS if \a pci has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device or \a link is invalid or \a pci is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetNvLinkRemotePciInfo(nvmlDevice_t device, unsigned int link, nvmlPciInfo_t *pci); + +/** + * Retrieves the specified error counter value + * Please refer to \a nvmlNvLinkErrorCounter_t for error counters that are available + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param link Specifies the NvLink link to be queried + * @param counter Specifies the NvLink counter to be queried + * @param counterValue Returned counter value + * + * @return + * - \ref NVML_SUCCESS if \a counter has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a link, or \a counter is invalid or \a counterValue is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetNvLinkErrorCounter(nvmlDevice_t device, unsigned int link, + nvmlNvLinkErrorCounter_t counter, unsigned long long *counterValue); + +/** + * Resets all error counters to zero + * Please refer to \a nvmlNvLinkErrorCounter_t for the list of error counters that are reset + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param link Specifies the NvLink link to be queried + * + * @return + * - \ref NVML_SUCCESS if the reset is successful + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device or \a link is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceResetNvLinkErrorCounters(nvmlDevice_t device, unsigned int link); + +/** + * Set the NVLINK utilization counter control information for the specified counter, 0 or 1. + * Please refer to \a nvmlNvLinkUtilizationControl_t for the structure definition. Performs a reset + * of the counters if the reset parameter is non-zero. + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param counter Specifies the counter that should be set (0 or 1). + * @param link Specifies the NvLink link to be queried + * @param control A reference to the \a nvmlNvLinkUtilizationControl_t to set + * @param reset Resets the counters on set if non-zero + * + * @return + * - \ref NVML_SUCCESS if the control has been set successfully + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a counter, \a link, or \a control is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceSetNvLinkUtilizationControl(nvmlDevice_t device, unsigned int link, unsigned int counter, + nvmlNvLinkUtilizationControl_t *control, unsigned int reset); + +/** + * Get the NVLINK utilization counter control information for the specified counter, 0 or 1. + * Please refer to \a nvmlNvLinkUtilizationControl_t for the structure definition + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param counter Specifies the counter that should be set (0 or 1). + * @param link Specifies the NvLink link to be queried + * @param control A reference to the \a nvmlNvLinkUtilizationControl_t to place information + * + * @return + * - \ref NVML_SUCCESS if the control has been set successfully + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a counter, \a link, or \a control is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetNvLinkUtilizationControl(nvmlDevice_t device, unsigned int link, unsigned int counter, + nvmlNvLinkUtilizationControl_t *control); + + +/** + * Retrieve the NVLINK utilization counter based on the current control for a specified counter. + * In general it is good practice to use \a nvmlDeviceSetNvLinkUtilizationControl + * before reading the utilization counters as they have no default state + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param link Specifies the NvLink link to be queried + * @param counter Specifies the counter that should be read (0 or 1). + * @param rxcounter Receive counter return value + * @param txcounter Transmit counter return value + * + * @return + * - \ref NVML_SUCCESS if \a rxcounter and \a txcounter have been successfully set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a counter, or \a link is invalid or \a rxcounter or \a txcounter are NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceGetNvLinkUtilizationCounter(nvmlDevice_t device, unsigned int link, unsigned int counter, + unsigned long long *rxcounter, unsigned long long *txcounter); + +/** + * Freeze the NVLINK utilization counters + * Both the receive and transmit counters are operated on by this function + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param link Specifies the NvLink link to be queried + * @param counter Specifies the counter that should be frozen (0 or 1). + * @param freeze NVML_FEATURE_ENABLED = freeze the receive and transmit counters + * NVML_FEATURE_DISABLED = unfreeze the receive and transmit counters + * + * @return + * - \ref NVML_SUCCESS if counters were successfully frozen or unfrozen + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a link, \a counter, or \a freeze is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceFreezeNvLinkUtilizationCounter (nvmlDevice_t device, unsigned int link, + unsigned int counter, nvmlEnableState_t freeze); + +/** + * Reset the NVLINK utilization counters + * Both the receive and transmit counters are operated on by this function + * + * For newer than Maxwell &tm; fully supported devices. + * + * @param device The identifier of the target device + * @param link Specifies the NvLink link to be reset + * @param counter Specifies the counter that should be reset (0 or 1) + * + * @return + * - \ref NVML_SUCCESS if counters were successfully reset + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a device, \a link, or \a counter is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceResetNvLinkUtilizationCounter (nvmlDevice_t device, unsigned int link, unsigned int counter); + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlEvents Event Handling Methods + * This chapter describes methods that NVML can perform against each device to register and wait for + * some event to occur. + * @{ + */ +/***************************************************************************************************/ + +/** + * Create an empty set of events. + * Event set should be freed by \ref nvmlEventSetFree + * + * For Fermi &tm; or newer fully supported devices. + * @param set Reference in which to return the event handle + * + * @return + * - \ref NVML_SUCCESS if the event has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a set is NULL + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlEventSetFree + */ +nvmlReturn_t DECLDIR nvmlEventSetCreate(nvmlEventSet_t *set); + +/** + * Starts recording of events on a specified devices and add the events to specified \ref nvmlEventSet_t + * + * For Fermi &tm; or newer fully supported devices. + * Ecc events are available only on ECC enabled devices (see \ref nvmlDeviceGetTotalEccErrors) + * Power capping events are available only on Power Management enabled devices (see \ref nvmlDeviceGetPowerManagementMode) + * + * For Linux only. + * + * \b IMPORTANT: Operations on \a set are not thread safe + * + * This call starts recording of events on specific device. + * All events that occurred before this call are not recorded. + * Checking if some event occurred can be done with \ref nvmlEventSetWait + * + * If function reports NVML_ERROR_UNKNOWN, event set is in undefined state and should be freed. + * If function reports NVML_ERROR_NOT_SUPPORTED, event set can still be used. None of the requested eventTypes + * are registered in that case. + * + * @param device The identifier of the target device + * @param eventTypes Bitmask of \ref nvmlEventType to record + * @param set Set to which add new event types + * + * @return + * - \ref NVML_SUCCESS if the event has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a eventTypes is invalid or \a set is NULL + * - \ref NVML_ERROR_NOT_SUPPORTED if the platform does not support this feature or some of requested event types + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlEventType + * @see nvmlDeviceGetSupportedEventTypes + * @see nvmlEventSetWait + * @see nvmlEventSetFree + */ +nvmlReturn_t DECLDIR nvmlDeviceRegisterEvents(nvmlDevice_t device, unsigned long long eventTypes, nvmlEventSet_t set); + +/** + * Returns information about events supported on device + * + * For Fermi &tm; or newer fully supported devices. + * + * Events are not supported on Windows. So this function returns an empty mask in \a eventTypes on Windows. + * + * @param device The identifier of the target device + * @param eventTypes Reference in which to return bitmask of supported events + * + * @return + * - \ref NVML_SUCCESS if the eventTypes has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a eventType is NULL + * - \ref NVML_ERROR_GPU_IS_LOST if the target GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlEventType + * @see nvmlDeviceRegisterEvents + */ +nvmlReturn_t DECLDIR nvmlDeviceGetSupportedEventTypes(nvmlDevice_t device, unsigned long long *eventTypes); + +/** + * Waits on events and delivers events + * + * For Fermi &tm; or newer fully supported devices. + * + * If some events are ready to be delivered at the time of the call, function returns immediately. + * If there are no events ready to be delivered, function sleeps till event arrives + * but not longer than specified timeout. This function in certain conditions can return before + * specified timeout passes (e.g. when interrupt arrives) + * + * In case of xid error, the function returns the most recent xid error type seen by the system. If there are multiple + * xid errors generated before nvmlEventSetWait is invoked then the last seen xid error type is returned for all + * xid error events. + * + * @param set Reference to set of events to wait on + * @param data Reference in which to return event data + * @param timeoutms Maximum amount of wait time in milliseconds for registered event + * + * @return + * - \ref NVML_SUCCESS if the data has been set + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a data is NULL + * - \ref NVML_ERROR_TIMEOUT if no event arrived in specified timeout or interrupt arrived + * - \ref NVML_ERROR_GPU_IS_LOST if a GPU has fallen off the bus or is otherwise inaccessible + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlEventType + * @see nvmlDeviceRegisterEvents + */ +nvmlReturn_t DECLDIR nvmlEventSetWait(nvmlEventSet_t set, nvmlEventData_t * data, unsigned int timeoutms); + +/** + * Releases events in the set + * + * For Fermi &tm; or newer fully supported devices. + * + * @param set Reference to events to be released + * + * @return + * - \ref NVML_SUCCESS if the event has been successfully released + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + * + * @see nvmlDeviceRegisterEvents + */ +nvmlReturn_t DECLDIR nvmlEventSetFree(nvmlEventSet_t set); + +/** @} */ + +/***************************************************************************************************/ +/** @defgroup nvmlZPI Drain states + * This chapter describes methods that NVML can perform against each device to control their drain state + * and recognition by NVML and NVIDIA kernel driver. These methods can be used with out-of-band tools to + * power on/off GPUs, enable robust reset scenarios, etc. + * @{ + */ +/***************************************************************************************************/ + +/** + * Modify the drain state of a GPU. This method forces a GPU to no longer accept new incoming requests. + * Any new NVML process will no longer see this GPU. Persistence mode for this GPU must be turned off before + * this call is made. + * Must be called as administrator. + * For Linux only. + * + * For newer than Maxwell &tm; fully supported devices. + * Some Kepler devices supported. + * + * @param pciInfo The PCI address of the GPU drain state to be modified + * @param newState The drain state that should be entered, see \ref nvmlEnableState_t + * + * @return + * - \ref NVML_SUCCESS if counters were successfully reset + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a nvmlIndex or \a newState is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_NO_PERMISSION if the calling process has insufficient permissions to perform operation + * - \ref NVML_ERROR_IN_USE if the device has persistence mode turned on + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceModifyDrainState (nvmlPciInfo_t *pciInfo, nvmlEnableState_t newState); + +/** + * Query the drain state of a GPU. This method is used to check if a GPU is in a currently draining + * state. + * For Linux only. + * + * For newer than Maxwell &tm; fully supported devices. + * Some Kepler devices supported. + * + * @param pciInfo The PCI address of the GPU drain state to be queried + * @param currentState The current drain state for this GPU, see \ref nvmlEnableState_t + * + * @return + * - \ref NVML_SUCCESS if counters were successfully reset + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a nvmlIndex or \a currentState is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceQueryDrainState (nvmlPciInfo_t *pciInfo, nvmlEnableState_t *currentState); + +/** + * This method will remove the specified GPU from the view of both NVML and the NVIDIA kernel driver + * as long as no other processes are attached. If other processes are attached, this call will return + * NVML_ERROR_IN_USE and the GPU will be returned to its original "draining" state. Note: the + * only situation where a process can still be attached after nvmlDeviceModifyDrainState() is called + * to initiate the draining state is if that process was using, and is still using, a GPU before the + * call was made. Also note, persistence mode counts as an attachment to the GPU thus it must be disabled + * prior to this call. + * + * For long-running NVML processes please note that this will change the enumeration of current GPUs. + * For example, if there are four GPUs present and GPU1 is removed, the new enumeration will be 0-2. + * Also, device handles after the removed GPU will not be valid and must be re-established. + * Must be run as administrator. + * For Linux only. + * + * For newer than Maxwell &tm; fully supported devices. + * Some Kepler devices supported. + * + * @param pciInfo The PCI address of the GPU to be removed + * + * @return + * - \ref NVML_SUCCESS if counters were successfully reset + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a nvmlIndex is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the device doesn't support this feature + * - \ref NVML_ERROR_IN_USE if the device is still in use and cannot be removed + */ +nvmlReturn_t DECLDIR nvmlDeviceRemoveGpu (nvmlPciInfo_t *pciInfo); + +/** + * Request the OS and the NVIDIA kernel driver to rediscover a portion of the PCI subsystem looking for GPUs that + * were previously removed. The portion of the PCI tree can be narrowed by specifying a domain, bus, and device. + * If all are zeroes then the entire PCI tree will be searched. Please note that for long-running NVML processes + * the enumeration will change based on how many GPUs are discovered and where they are inserted in bus order. + * + * In addition, all newly discovered GPUs will be initialized and their ECC scrubbed which may take several seconds + * per GPU. Also, all device handles are no longer guaranteed to be valid post discovery. + * + * Must be run as administrator. + * For Linux only. + * + * For newer than Maxwell &tm; fully supported devices. + * Some Kepler devices supported. + * + * @param pciInfo The PCI tree to be searched. Only the domain, bus, and device + * fields are used in this call. + * + * @return + * - \ref NVML_SUCCESS if counters were successfully reset + * - \ref NVML_ERROR_UNINITIALIZED if the library has not been successfully initialized + * - \ref NVML_ERROR_INVALID_ARGUMENT if \a pciInfo is invalid + * - \ref NVML_ERROR_NOT_SUPPORTED if the operating system does not support this feature + * - \ref NVML_ERROR_OPERATING_SYSTEM if the operating system is denying this feature + * - \ref NVML_ERROR_NO_PERMISSION if the calling process has insufficient permissions to perform operation + * - \ref NVML_ERROR_UNKNOWN on any unexpected error + */ +nvmlReturn_t DECLDIR nvmlDeviceDiscoverGpus (nvmlPciInfo_t *pciInfo); + +/** @} */ + +/** + * NVML API versioning support + */ +#if defined(__NVML_API_VERSION_INTERNAL) +#undef nvmlDeviceGetPciInfo +#undef nvmlDeviceGetCount +#undef nvmlDeviceGetHandleByIndex +#undef nvmlDeviceGetHandleByPciBusId +#undef nvmlInit +#endif + +#ifdef __cplusplus +} +#endif + +#endif -- 2.14.2