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|
#!/bin/sh
test_description="Test core.fsmonitor"
. ./perf-lib.sh
#
# Performance test for the fsmonitor feature which enables git to talk to a
# file system change monitor and avoid having to scan the working directory
# for new or modified files.
#
# By default, the performance test will utilize the Watchman file system
# monitor if it is installed. If Watchman is not installed, it will use a
# dummy integration script that does not report any new or modified files.
# The dummy script has very little overhead which provides optimistic results.
#
# The performance test will also use the untracked cache feature if it is
# available as fsmonitor uses it to speed up scanning for untracked files.
#
# There are 3 environment variables that can be used to alter the default
# behavior of the performance test:
#
# GIT_PERF_7519_UNTRACKED_CACHE: used to configure core.untrackedCache
# GIT_PERF_7519_SPLIT_INDEX: used to configure core.splitIndex
# GIT_PERF_7519_FSMONITOR: used to configure core.fsMonitor
#
# The big win for using fsmonitor is the elimination of the need to scan the
# working directory looking for changed and untracked files. If the file
# information is all cached in RAM, the benefits are reduced.
#
# GIT_PERF_7519_DROP_CACHE: if set, the OS caches are dropped between tests
#
test_perf_large_repo
test_checkout_worktree
test_lazy_prereq UNTRACKED_CACHE '
{ git update-index --test-untracked-cache; ret=$?; } &&
test $ret -ne 1
'
test_lazy_prereq WATCHMAN '
command -v watchman
'
if test_have_prereq WATCHMAN
then
# Convert unix style paths to escaped Windows style paths for Watchman
case "$(uname -s)" in
MSYS_NT*)
GIT_WORK_TREE="$(cygpath -aw "$PWD" | sed 's,\\,/,g')"
;;
*)
GIT_WORK_TREE="$PWD"
;;
esac
fi
if test -n "$GIT_PERF_7519_DROP_CACHE"
then
# When using GIT_PERF_7519_DROP_CACHE, GIT_PERF_REPEAT_COUNT must be 1 to
# generate valid results. Otherwise the caching that happens for the nth
# run will negate the validity of the comparisons.
if test "$GIT_PERF_REPEAT_COUNT" -ne 1
then
echo "warning: Setting GIT_PERF_REPEAT_COUNT=1" >&2
GIT_PERF_REPEAT_COUNT=1
fi
fi
test_expect_success "setup for fsmonitor" '
# set untrackedCache depending on the environment
if test -n "$GIT_PERF_7519_UNTRACKED_CACHE"
then
git config core.untrackedCache "$GIT_PERF_7519_UNTRACKED_CACHE"
else
if test_have_prereq UNTRACKED_CACHE
then
git config core.untrackedCache true
else
git config core.untrackedCache false
fi
fi &&
# set core.splitindex depending on the environment
if test -n "$GIT_PERF_7519_SPLIT_INDEX"
then
git config core.splitIndex "$GIT_PERF_7519_SPLIT_INDEX"
fi &&
# set INTEGRATION_SCRIPT depending on the environment
if test -n "$GIT_PERF_7519_FSMONITOR"
then
INTEGRATION_SCRIPT="$GIT_PERF_7519_FSMONITOR"
else
#
# Choose integration script based on existence of Watchman.
# If Watchman exists, watch the work tree and attempt a query.
# If everything succeeds, use Watchman integration script,
# else fall back to an empty integration script.
#
mkdir .git/hooks &&
if test_have_prereq WATCHMAN
then
INTEGRATION_SCRIPT=".git/hooks/fsmonitor-watchman" &&
cp "$TEST_DIRECTORY/../templates/hooks--fsmonitor-watchman.sample" "$INTEGRATION_SCRIPT" &&
watchman watch "$GIT_WORK_TREE" &&
watchman watch-list | grep -q -F "$GIT_WORK_TREE"
else
INTEGRATION_SCRIPT=".git/hooks/fsmonitor-empty" &&
write_script "$INTEGRATION_SCRIPT"<<-\EOF
EOF
fi
fi &&
git config core.fsmonitor "$INTEGRATION_SCRIPT" &&
git update-index --fsmonitor
'
if test -n "$GIT_PERF_7519_DROP_CACHE"; then
test-tool drop-caches
fi
test_perf "status (fsmonitor=$INTEGRATION_SCRIPT)" '
git status
'
if test -n "$GIT_PERF_7519_DROP_CACHE"; then
test-tool drop-caches
fi
test_perf "status -uno (fsmonitor=$INTEGRATION_SCRIPT)" '
git status -uno
'
if test -n "$GIT_PERF_7519_DROP_CACHE"; then
test-tool drop-caches
fi
test_perf "status -uall (fsmonitor=$INTEGRATION_SCRIPT)" '
git status -uall
'
test_expect_success "setup without fsmonitor" '
unset INTEGRATION_SCRIPT &&
git config --unset core.fsmonitor &&
git update-index --no-fsmonitor
'
if test -n "$GIT_PERF_7519_DROP_CACHE"; then
test-tool drop-caches
fi
test_perf "status (fsmonitor=$INTEGRATION_SCRIPT)" '
git status
'
if test -n "$GIT_PERF_7519_DROP_CACHE"; then
test-tool drop-caches
fi
test_perf "status -uno (fsmonitor=$INTEGRATION_SCRIPT)" '
git status -uno
'
if test -n "$GIT_PERF_7519_DROP_CACHE"; then
test-tool drop-caches
fi
test_perf "status -uall (fsmonitor=$INTEGRATION_SCRIPT)" '
git status -uall
'
if test_have_prereq WATCHMAN
then
watchman watch-del "$GIT_WORK_TREE" >/dev/null 2>&1 &&
# Work around Watchman bug on Windows where it holds on to handles
# preventing the removal of the trash directory
watchman shutdown-server >/dev/null 2>&1
fi
test_done
|
