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![Junio C Hamano](/assets/img/avatar_default.png)
Introduce a filesystem-dependent mechanism to optimize the way the bits for many loose object files are ensured to hit the disk platter. * ns/batch-fsync: core.fsyncmethod: performance tests for batch mode t/perf: add iteration setup mechanism to perf-lib core.fsyncmethod: tests for batch mode test-lib-functions: add parsing helpers for ls-files and ls-tree core.fsync: use batch mode and sync loose objects by default on Windows unpack-objects: use the bulk-checkin infrastructure update-index: use the bulk-checkin infrastructure builtin/add: add ODB transaction around add_files_to_cache cache-tree: use ODB transaction around writing a tree core.fsyncmethod: batched disk flushes for loose-objects bulk-checkin: rebrand plug/unplug APIs as 'odb transactions' bulk-checkin: rename 'state' variable and separate 'plugged' boolean
315 lines
7.7 KiB
Bash
Executable file
315 lines
7.7 KiB
Bash
Executable file
#!/bin/sh
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test_description="Test core.fsmonitor"
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. ./perf-lib.sh
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#
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# Performance test for the fsmonitor feature which enables git to talk to a
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# file system change monitor and avoid having to scan the working directory
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# for new or modified files.
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#
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# By default, the performance test will utilize the Watchman file system
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# monitor if it is installed. If Watchman is not installed, it will use a
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# dummy integration script that does not report any new or modified files.
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# The dummy script has very little overhead which provides optimistic results.
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#
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# The performance test will also use the untracked cache feature if it is
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# available as fsmonitor uses it to speed up scanning for untracked files.
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#
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# There are 3 environment variables that can be used to alter the default
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# behavior of the performance test:
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#
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# GIT_PERF_7519_UNTRACKED_CACHE: used to configure core.untrackedCache
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# GIT_PERF_7519_SPLIT_INDEX: used to configure core.splitIndex
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# GIT_PERF_7519_FSMONITOR: used to configure core.fsMonitor. May be an
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# absolute path to an integration. May be a space delimited list of
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# absolute paths to integrations.
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#
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# The big win for using fsmonitor is the elimination of the need to scan the
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# working directory looking for changed and untracked files. If the file
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# information is all cached in RAM, the benefits are reduced.
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#
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# GIT_PERF_7519_DROP_CACHE: if set, the OS caches are dropped between tests
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#
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# GIT_PERF_7519_TRACE: if set, enable trace logging during the test.
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# Trace logs will be grouped by fsmonitor provider.
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test_perf_large_repo
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test_checkout_worktree
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test_lazy_prereq UNTRACKED_CACHE '
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{ git update-index --test-untracked-cache; ret=$?; } &&
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test $ret -ne 1
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'
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test_lazy_prereq WATCHMAN '
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command -v watchman
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'
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if test_have_prereq WATCHMAN
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then
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# Convert unix style paths to escaped Windows style paths for Watchman
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case "$(uname -s)" in
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MSYS_NT*)
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GIT_WORK_TREE="$(cygpath -aw "$PWD" | sed 's,\\,/,g')"
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;;
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*)
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GIT_WORK_TREE="$PWD"
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;;
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esac
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fi
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trace_start () {
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if test -n "$GIT_PERF_7519_TRACE"
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then
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name="$1"
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TEST_TRACE_DIR="$TEST_OUTPUT_DIRECTORY/test-trace/p7519/"
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echo "Writing trace logging to $TEST_TRACE_DIR"
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mkdir -p "$TEST_TRACE_DIR"
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# Start Trace2 logging and any other GIT_TRACE_* logs that you
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# want for this named test case.
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GIT_TRACE2_PERF="$TEST_TRACE_DIR/$name.trace2perf"
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export GIT_TRACE2_PERF
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>"$GIT_TRACE2_PERF"
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fi
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}
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trace_stop () {
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if test -n "$GIT_PERF_7519_TRACE"
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then
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unset GIT_TRACE2_PERF
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fi
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}
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touch_files () {
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n=$1 &&
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d="$n"_files &&
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(cd $d && test_seq 1 $n | xargs touch )
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}
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test_expect_success "one time repo setup" '
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# set untrackedCache depending on the environment
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if test -n "$GIT_PERF_7519_UNTRACKED_CACHE"
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then
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git config core.untrackedCache "$GIT_PERF_7519_UNTRACKED_CACHE"
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else
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if test_have_prereq UNTRACKED_CACHE
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then
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git config core.untrackedCache true
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else
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git config core.untrackedCache false
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fi
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fi &&
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# set core.splitindex depending on the environment
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if test -n "$GIT_PERF_7519_SPLIT_INDEX"
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then
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git config core.splitIndex "$GIT_PERF_7519_SPLIT_INDEX"
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fi &&
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mkdir 1_file 10_files 100_files 1000_files 10000_files &&
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: 1_file directory should be left empty &&
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touch_files 10 &&
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touch_files 100 &&
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touch_files 1000 &&
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touch_files 10000 &&
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git add 1_file 10_files 100_files 1000_files 10000_files &&
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git commit -qm "Add files" &&
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# If Watchman exists, watch the work tree and attempt a query.
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if test_have_prereq WATCHMAN; then
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watchman watch "$GIT_WORK_TREE" &&
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watchman watch-list | grep -q -F "p7519-fsmonitor"
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fi
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'
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setup_for_fsmonitor_hook () {
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# set INTEGRATION_SCRIPT depending on the environment
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if test -n "$INTEGRATION_PATH"
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then
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INTEGRATION_SCRIPT="$INTEGRATION_PATH"
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else
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#
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# Choose integration script based on existence of Watchman.
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# Fall back to an empty integration script.
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#
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mkdir .git/hooks &&
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if test_have_prereq WATCHMAN
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then
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INTEGRATION_SCRIPT=".git/hooks/fsmonitor-watchman" &&
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cp "$TEST_DIRECTORY/../templates/hooks--fsmonitor-watchman.sample" "$INTEGRATION_SCRIPT"
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else
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INTEGRATION_SCRIPT=".git/hooks/fsmonitor-empty" &&
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write_script "$INTEGRATION_SCRIPT"<<-\EOF
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EOF
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fi
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fi &&
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git config core.fsmonitor "$INTEGRATION_SCRIPT" &&
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git update-index --fsmonitor 2>error &&
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if test_have_prereq WATCHMAN
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then
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test_must_be_empty error # ensure no silent error
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else
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grep "Empty last update token" error
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fi
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}
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test_perf_w_drop_caches () {
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if test -n "$GIT_PERF_7519_DROP_CACHE"; then
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test_perf "$1" --setup "test-tool drop-caches" "$2"
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else
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test_perf "$@"
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fi
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}
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test_fsmonitor_suite () {
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if test -n "$USE_FSMONITOR_DAEMON"
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then
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DESC="builtin fsmonitor--daemon"
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elif test -n "$INTEGRATION_SCRIPT"
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then
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DESC="fsmonitor=$(basename $INTEGRATION_SCRIPT)"
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else
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DESC="fsmonitor=disabled"
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fi
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test_expect_success "test_initialization" '
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git reset --hard &&
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git status # Warm caches
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'
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test_perf_w_drop_caches "status ($DESC)" '
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git status
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'
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test_perf_w_drop_caches "status -uno ($DESC)" '
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git status -uno
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'
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test_perf_w_drop_caches "status -uall ($DESC)" '
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git status -uall
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'
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# Update the mtimes on upto 100k files to make status think
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# that they are dirty. For simplicity, omit any files with
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# LFs (i.e. anything that ls-files thinks it needs to dquote)
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# and any files with whitespace so that they pass thru xargs
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# properly.
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#
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test_perf_w_drop_caches "status (dirty) ($DESC)" '
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git ls-files | \
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head -100000 | \
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grep -v \" | \
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grep -v " ." | \
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xargs test-tool chmtime -300 &&
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git status
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'
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test_perf_w_drop_caches "diff ($DESC)" '
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git diff
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'
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test_perf_w_drop_caches "diff HEAD ($DESC)" '
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git diff HEAD
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'
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test_perf_w_drop_caches "diff -- 0_files ($DESC)" '
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git diff -- 1_file
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'
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test_perf_w_drop_caches "diff -- 10_files ($DESC)" '
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git diff -- 10_files
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'
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test_perf_w_drop_caches "diff -- 100_files ($DESC)" '
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git diff -- 100_files
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'
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test_perf_w_drop_caches "diff -- 1000_files ($DESC)" '
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git diff -- 1000_files
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'
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test_perf_w_drop_caches "diff -- 10000_files ($DESC)" '
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git diff -- 10000_files
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'
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test_perf_w_drop_caches "add ($DESC)" '
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git add --all
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'
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}
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#
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# Run a full set of perf tests using each Hook-based fsmonitor provider,
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# such as Watchman.
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#
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trace_start fsmonitor-watchman
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if test -n "$GIT_PERF_7519_FSMONITOR"; then
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for INTEGRATION_PATH in $GIT_PERF_7519_FSMONITOR; do
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test_expect_success "setup for fsmonitor $INTEGRATION_PATH" 'setup_for_fsmonitor_hook'
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test_fsmonitor_suite
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done
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else
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test_expect_success "setup for fsmonitor hook" 'setup_for_fsmonitor_hook'
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test_fsmonitor_suite
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fi
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if test_have_prereq WATCHMAN
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then
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watchman watch-del "$GIT_WORK_TREE" >/dev/null 2>&1 &&
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# Work around Watchman bug on Windows where it holds on to handles
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# preventing the removal of the trash directory
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watchman shutdown-server >/dev/null 2>&1
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fi
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trace_stop
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#
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# Run a full set of perf tests with the fsmonitor feature disabled.
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#
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trace_start fsmonitor-disabled
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test_expect_success "setup without fsmonitor" '
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unset INTEGRATION_SCRIPT &&
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git config --unset core.fsmonitor &&
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git update-index --no-fsmonitor
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'
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test_fsmonitor_suite
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trace_stop
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#
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# Run a full set of perf tests using the built-in fsmonitor--daemon.
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# It does not use the Hook API, so it has a different setup.
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# Explicitly start the daemon here and before we start client commands
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# so that we can later add custom tracing.
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#
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if test_have_prereq FSMONITOR_DAEMON
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then
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USE_FSMONITOR_DAEMON=t
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test_expect_success "setup for builtin fsmonitor" '
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trace_start fsmonitor--daemon--server &&
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git fsmonitor--daemon start &&
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trace_start fsmonitor--daemon--client &&
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git config core.fsmonitor true &&
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git update-index --fsmonitor
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'
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test_fsmonitor_suite
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git fsmonitor--daemon stop
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trace_stop
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fi
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test_done
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