git/t/perf/p7527-builtin-fsmonitor.sh

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#!/bin/sh
test_description="Perf test for the builtin FSMonitor"
. ./perf-lib.sh
if ! test_have_prereq FSMONITOR_DAEMON
then
skip_all="fsmonitor--daemon is not supported on this platform"
test_done
fi
test_lazy_prereq UNTRACKED_CACHE '
{ git update-index --test-untracked-cache; ret=$?; } &&
test $ret -ne 1
'
# Lie to perf-lib and ask for a new empty repo and avoid
# the complaints about GIT_PERF_REPO not being big enough
# the perf hit when GIT_PERF_LARGE_REPO is copied into
# the trash directory.
#
# NEEDSWORK: It would be nice if perf-lib had an option to
# "borrow" an existing large repo (especially for gigantic
# monorepos) and use it in-place. For now, fake it here.
#
test_perf_fresh_repo
# Use a generated synthetic monorepo. If it doesn't exist, we will
# generate it. If it does exist, we will put it in a known state
# before we start our timings.
#
PARAM_D=5
PARAM_W=10
PARAM_F=9
PARAMS="$PARAM_D"."$PARAM_W"."$PARAM_F"
BALLAST_BR=p0006-ballast
export BALLAST_BR
TMP_BR=tmp_br
export TMP_BR
REPO=../repos/gen-many-files-"$PARAMS".git
export REPO
if ! test -d $REPO
then
(cd ../repos; ./many-files.sh -d $PARAM_D -w $PARAM_W -f $PARAM_F)
fi
enable_uc () {
git -C $REPO config core.untrackedcache true
git -C $REPO update-index --untracked-cache
git -C $REPO status >/dev/null 2>&1
}
disable_uc () {
git -C $REPO config core.untrackedcache false
git -C $REPO update-index --no-untracked-cache
git -C $REPO status >/dev/null 2>&1
}
start_fsm () {
git -C $REPO fsmonitor--daemon start
git -C $REPO fsmonitor--daemon status
git -C $REPO config core.fsmonitor true
git -C $REPO update-index --fsmonitor
git -C $REPO status >/dev/null 2>&1
}
stop_fsm () {
git -C $REPO config --unset core.fsmonitor
git -C $REPO update-index --no-fsmonitor
test_might_fail git -C $REPO fsmonitor--daemon stop 2>/dev/null
git -C $REPO status >/dev/null 2>&1
}
# Ensure that FSMonitor is turned off on the borrowed repo.
#
test_expect_success "Setup borrowed repo (fsm+uc)" "
stop_fsm &&
disable_uc
"
# Also ensure that it starts in a known state.
#
# Because we assume that $GIT_PERF_REPEAT_COUNT > 1, we are not going to time
# the ballast checkout, since only the first invocation does any work and the
# subsequent ones just print "already on branch" and quit, so the reported
# time is not useful.
#
# Create a temp branch and do all work relative to it so that we don't
# accidentially alter the real ballast branch.
#
test_expect_success "Setup borrowed repo (temp ballast branch)" "
test_might_fail git -C $REPO checkout $BALLAST_BR &&
test_might_fail git -C $REPO reset --hard &&
git -C $REPO clean -d -f &&
test_might_fail git -C $REPO branch -D $TMP_BR &&
git -C $REPO branch $TMP_BR $BALLAST_BR &&
git -C $REPO checkout $TMP_BR
"
echo Data >data.txt
# NEEDSWORK: We assume that $GIT_PERF_REPEAT_COUNT > 1. With
# FSMonitor enabled, we can get a skewed view of status times, since
# the index MAY (or may not) be updated after the first invocation
# which will update the FSMonitor Token, so the subsequent invocations
# may get a smaller response from the daemon.
#
do_status () {
msg=$1
test_perf "$msg" "
git -C $REPO status >/dev/null 2>&1
"
}
do_matrix () {
uc=$1
fsm=$2
t="[uc $uc][fsm $fsm]"
MATRIX_BR="$TMP_BR-$uc-$fsm"
test_expect_success "$t Setup matrix branch" "
git -C $REPO clean -d -f &&
git -C $REPO checkout $TMP_BR &&
test_might_fail git -C $REPO branch -D $MATRIX_BR &&
git -C $REPO branch $MATRIX_BR $TMP_BR &&
git -C $REPO checkout $MATRIX_BR
"
if test $uc = true
then
enable_uc
else
disable_uc
fi
if test $fsm = true
then
start_fsm
else
stop_fsm
fi
do_status "$t status after checkout"
# Modify many files in the matrix branch.
# Stage them.
# Commit them.
# Rollback.
#
test_expect_success "$t modify tracked files" "
find $REPO -name file1 -exec cp data.txt {} \\;
"
do_status "$t status after big change"
# Don't bother timing the "add" because _REPEAT_COUNT
# issue described above.
#
test_expect_success "$t add all" "
git -C $REPO add -A
"
do_status "$t status after add all"
test_expect_success "$t add dot" "
git -C $REPO add .
"
do_status "$t status after add dot"
test_expect_success "$t commit staged" "
git -C $REPO commit -a -m data
"
do_status "$t status after commit"
test_expect_success "$t reset HEAD~1 hard" "
git -C $REPO reset --hard HEAD~1 >/dev/null 2>&1
"
do_status "$t status after reset hard"
# Create some untracked files.
#
test_expect_success "$t create untracked files" "
cp -R $REPO/ballast/dir1 $REPO/ballast/xxx1
"
do_status "$t status after create untracked files"
# Remove the new untracked files.
#
test_expect_success "$t clean -df" "
git -C $REPO clean -d -f
"
do_status "$t status after clean"
if test $fsm = true
then
stop_fsm
fi
}
# Begin testing each case in the matrix that we care about.
#
uc_values="false"
test_have_prereq UNTRACKED_CACHE && uc_values="false true"
fsm_values="false true"
for uc_val in $uc_values
do
for fsm_val in $fsm_values
do
do_matrix $uc_val $fsm_val
done
done
cleanup () {
uc=$1
fsm=$2
MATRIX_BR="$TMP_BR-$uc-$fsm"
test_might_fail git -C $REPO branch -D $MATRIX_BR
}
# We're borrowing this repo. We should leave it in a clean state.
#
test_expect_success "Cleanup temp and matrix branches" "
git -C $REPO clean -d -f &&
test_might_fail git -C $REPO checkout $BALLAST_BR &&
test_might_fail git -C $REPO branch -D $TMP_BR &&
for uc_val in $uc_values
do
for fsm_val in $fsm_values
do
cleanup $uc_val $fsm_val || return 1
done
done
"
test_done