summaryrefslogtreecommitdiff
path: root/t/perf/p7519-fsmonitor.sh
diff options
context:
space:
mode:
Diffstat (limited to 't/perf/p7519-fsmonitor.sh')
-rwxr-xr-xt/perf/p7519-fsmonitor.sh183
1 files changed, 183 insertions, 0 deletions
diff --git a/t/perf/p7519-fsmonitor.sh b/t/perf/p7519-fsmonitor.sh
new file mode 100755
index 0000000000..65e145c02d
--- /dev/null
+++ b/t/perf/p7519-fsmonitor.sh
@@ -0,0 +1,183 @@
+#!/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-drop-caches
+fi
+
+test_perf "status (fsmonitor=$INTEGRATION_SCRIPT)" '
+ git status
+'
+
+if test -n "$GIT_PERF_7519_DROP_CACHE"; then
+ test-drop-caches
+fi
+
+test_perf "status -uno (fsmonitor=$INTEGRATION_SCRIPT)" '
+ git status -uno
+'
+
+if test -n "$GIT_PERF_7519_DROP_CACHE"; then
+ test-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-drop-caches
+fi
+
+test_perf "status (fsmonitor=$INTEGRATION_SCRIPT)" '
+ git status
+'
+
+if test -n "$GIT_PERF_7519_DROP_CACHE"; then
+ test-drop-caches
+fi
+
+test_perf "status -uno (fsmonitor=$INTEGRATION_SCRIPT)" '
+ git status -uno
+'
+
+if test -n "$GIT_PERF_7519_DROP_CACHE"; then
+ test-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