kernel/git - git - PowerEL Git System

Commit Graph

Author	SHA1	Message	Date
René Scharfe	1ecb5ff141	read-cache: add simple performance test Add the helper test-read-cache, which can be used to call read_cache and discard_cache in a loop as well as a performance check based on it. Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>	12 years ago
Antoine Pelisse	ca70c9ea72	perf: update documentation of GIT_PERF_REPEAT_COUNT Currently the documentation of GIT_PERF_REPEAT_COUNT says the default is five while "perf-lib.sh" uses a value of three as a default. Update the documentation so that it is consistent with the code. Signed-off-by: Antoine Pelisse <apelisse@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>	12 years ago
René Scharfe	ee1431bfc5	MALLOC_CHECK: enable it, unless disabled explicitly The malloc checks in tests are currently disabled. Actually evaluate the variable for turning them off and enable them if it's unset. Also use this opportunity to give it the more descriptive and consistent name TEST_NO_MALLOC_CHECK. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Junio C Hamano	1b3185fc2b	MALLOC_CHECK: various clean-ups The most important in this change is to avoid affecting anything when test-lib is used from perf-lib. It also limits the effect of the MALLOC_CHECK only to what is run inside the actual test, and uses a fixed MALLOC_PERTURB_ in order to avoid hurting repeatability of the tests. Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Ramkumar Ramachandra	5805853f22	t/perf: add "trash directory" to .gitignore Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Michał Kiedrowicz	d17cf5f3a3	tests: Introduce test_seq Jeff King wrote: The seq command is GNU-ism, and is missing at least in older BSD releases and their derivatives, not to mention antique commercial Unixes. We already purged it in `b3431bc` (Don't use seq in tests, not everyone has it, 2007-05-02), but a few new instances have crept in. They went unnoticed because they are in scripts that are not run by default. Replace them with test_seq that is implemented with a Perl snippet (proposed by Jeff). This is better than inlining this snippet everywhere it's needed because it's easier to read and it's easier to change the implementation (e.g. to C) if we ever decide to remove Perl from the test suite. Note that test_seq is not a complete replacement for seq(1). It just has what we need now, in addition that it makes it possible for us to do something like "test_seq a m" if we wanted to in the future. There are also many places that do `for i in 1 2 3 ...` but I'm not sure if it's worth converting them to test_seq. That would introduce running more processes of Perl. Signed-off-by: Michał Kiedrowicz <michal.kiedrowicz@gmail.com> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Nguyễn Thái Ngọc Duy	b8a2486f15	index-pack: support multithreaded delta resolving This puts delta resolving on each base on a separate thread, one base cache per thread. Per-thread data is grouped in struct thread_local. When running with nr_threads == 1, no pthreads calls are made. The system essentially runs in non-thread mode. An experiment on a Xeon 24 core machine with git.git shows that performance does not increase proportional to the number of cores. So by default, we use maximum 3 cores. Some numbers with --threads from 1 to 16: 1..4 real 0m8.003s 0m5.307s 0m4.321s 0m3.830s user 0m7.720s 0m8.009s 0m8.133s 0m8.305s sys 0m0.224s 0m0.372s 0m0.360s 0m0.360s 5..8 real 0m3.727s 0m3.604s 0m3.332s 0m3.369s user 0m9.361s 0m9.817s 0m9.525s 0m9.769s sys 0m0.584s 0m0.624s 0m0.540s 0m0.560s 9..12 real 0m3.036s 0m3.139s 0m3.177s 0m2.961s user 0m8.977s 0m10.205s 0m9.737s 0m10.073s sys 0m0.596s 0m0.680s 0m0.684s 0m0.680s 13..16 real 0m2.985s 0m2.894s 0m2.975s 0m2.971s user 0m9.825s 0m10.573s 0m10.833s 0m11.361s sys 0m0.788s 0m0.732s 0m0.904s 0m1.016s On an Intel dual core and linux-2.6.git 1..4 real 2m37.789s 2m7.963s 2m0.920s 1m58.213s user 2m28.415s 2m52.325s 2m50.176s 2m41.187s sys 0m7.808s 0m11.181s 0m11.224s 0m10.731s Thanks Ramsay Jones for troubleshooting and support on MinGW platform. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Thomas Rast	745950ce0e	p4000: use -3000 when promising -3000 The 'log -3000 (baseline)' test accidentally still used -1000 from an earlier version. Noticed-by: Lawrence Holding <Lawrence.Holding@cubic.com> Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Thomas Rast	561ae06735	perf: export some important test-lib variables The only bug right now is that $GIT_TEST_CMP is needed for test_cmp to work. However, we also export the three most important paths for tests: TEST_DIRECTORY TRASH_DIRECTORY GIT_BUILD_DIR Since they are available within test_expect_success, a future test writer may expect them to also be defined in test_perf. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Thomas Rast	1cbc32403b	perf: load test-lib-functions from the correct directory Loading it in the subshells still referred to $TEST_DIRECTORY/.., which was only correct in preliminary versions of perf-lib.sh Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Thomas Rast	85551232b5	perf: compare diff algorithms `8c912ee` (teach --histogram to diff, 2011-07-12) claimed histogram diff was faster than both Myers and patience. We have since incorporated a performance testing framework, so add a test that compares the various diff tasks performed in a real 'log -p' workload. This does indeed show that histogram diff slightly beats Myers, while patience is much slower than the others. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Thomas Rast	134593c8ca	Add a performance test for git-grep The only catch is that we don't really know what our repo contains, so we have to ignore any possible "not found" status from git-grep. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago
Thomas Rast	342e9ef2d9	Introduce a performance testing framework This introduces a performance testing framework under t/perf/. It tries to be as close to the test-lib.sh infrastructure as possible, and thus should be easy to get used to for git developers. The following points were considered for the implementation: 1. You usually want to compare arbitrary revisions/build trees against each other. They may not have the performance test under consideration, or even the perf-lib.sh infrastructure. To cope with this, the 'run' script lets you specify arbitrary build dirs and revisions. It even automatically builds the revisions if it doesn't have them at hand yet. 2. Usually you would not want to run all tests. It would take too long anyway. The 'run' script lets you specify which tests to run; or you can also do it manually. There is a Makefile for discoverability and 'make clean', but it is not meant for real-world use. 3. Creating test repos from scratch in every test is extremely time-consuming, and shipping or downloading such large/weird repos is out of the question. We leave this decision to the user. Two different sizes of test repos can be configured, and the scripts just copy one or more of those (using hardlinks for the object store). By default it tries to use the build tree's git.git repository. This is fairly fast and versatile. Using a copy instead of a clone preserves many properties that the user may want to test for, such as lots of loose objects, unpacked refs, etc. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>	13 years ago

16 Commits (182d7dc46b23b4a20985c93ea3a6ba3e6f267ff6)