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perf: amend the grep tests to test grep.threads
Ever since 5b594f4 ("Threaded grep", 2010-01-25) the number of threads git-grep uses under PTHREADS has been hardcoded to 8, but there's no performance test to check whether this is an optimal setting. Amend the existing tests for the grep engines to support a mode where this can be tested, e.g.: GIT_PERF_GREP_THREADS='1 8 16' GIT_PERF_LARGE_REPO=~/g/linux ./run p782* Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]> Signed-off-by: Junio C Hamano <[email protected]>
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2 files changed

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‎t/perf/p7820-grep-engines.sh

Lines changed: 42 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -12,13 +12,21 @@ e.g. GIT_PERF_7820_GREP_OPTS=' -i'. Some options to try:
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-vi
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-vw
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-viw
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If GIT_PERF_GREP_THREADS is set to a list of threads (e.g. '1 4 8'
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etc.) we will test the patterns under those numbers of threads.
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"
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. ./perf-lib.sh
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test_perf_large_repo
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test_checkout_worktree
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if test -n "$GIT_PERF_GREP_THREADS"
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then
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test_set_prereq PERF_GREP_ENGINES_THREADS
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fi
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for pattern in \
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'how.to' \
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'^how to' \
@@ -39,18 +47,42 @@ do
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else
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prereq=""
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fi
42-
test_perf $prereq "$engine grep$GIT_PERF_7820_GREP_OPTS '$pattern'" "
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git -c grep.patternType=$engine grep$GIT_PERF_7820_GREP_OPTS -- '$pattern' >'out.$engine' || :
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"
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done
46-
47-
test_expect_success "assert that all engines found the same for$GIT_PERF_7820_GREP_OPTS '$pattern'" '
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test_cmp out.basic out.extended &&
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if test_have_prereq PCRE
50+
if ! test_have_prereq PERF_GREP_ENGINES_THREADS
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then
51-
test_cmp out.basic out.perl
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test_perf $prereq "$engine grep$GIT_PERF_7820_GREP_OPTS '$pattern'" "
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git -c grep.patternType=$engine grep$GIT_PERF_7820_GREP_OPTS -- '$pattern' >'out.$engine' || :
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"
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else
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for threads in $GIT_PERF_GREP_THREADS
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do
58+
test_perf PTHREADS,$prereq "$engine grep$GIT_PERF_7820_GREP_OPTS '$pattern' with $threads threads" "
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git -c grep.patternType=$engine -c grep.threads=$threads grep$GIT_PERF_7820_GREP_OPTS -- '$pattern' >'out.$engine.$threads' || :
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"
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done
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fi
53-
'
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done
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if ! test_have_prereq PERF_GREP_ENGINES_THREADS
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then
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test_expect_success "assert that all engines found the same for$GIT_PERF_7820_GREP_OPTS '$pattern'" '
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test_cmp out.basic out.extended &&
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if test_have_prereq PCRE
70+
then
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test_cmp out.basic out.perl
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fi
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'
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else
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for threads in $GIT_PERF_GREP_THREADS
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do
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test_expect_success PTHREADS "assert that all engines found the same for$GIT_PERF_7820_GREP_OPTS '$pattern' under threading" "
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test_cmp out.basic.$threads out.extended.$threads &&
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if test_have_prereq PCRE
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then
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test_cmp out.basic.$threads out.perl.$threads
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fi
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"
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done
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fi
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done
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test_done

‎t/perf/p7821-grep-engines-fixed.sh

Lines changed: 44 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -6,13 +6,21 @@ Set GIT_PERF_7821_GREP_OPTS in the environment to pass options to
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git-grep. Make sure to include a leading space,
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e.g. GIT_PERF_7821_GREP_OPTS=' -w'. See p7820-grep-engines.sh for more
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options to try.
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If GIT_PERF_7821_THREADS is set to a list of threads (e.g. '1 4 8'
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etc.) we will test the patterns under those numbers of threads.
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"
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. ./perf-lib.sh
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test_perf_large_repo
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test_checkout_worktree
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19+
if test -n "$GIT_PERF_GREP_THREADS"
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then
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test_set_prereq PERF_GREP_ENGINES_THREADS
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fi
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for pattern in 'int' 'uncommon' 'æ'
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do
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for engine in fixed basic extended perl
@@ -23,19 +31,44 @@ do
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else
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prereq=""
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fi
26-
test_perf $prereq "$engine grep$GIT_PERF_7821_GREP_OPTS $pattern" "
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git -c grep.patternType=$engine grep$GIT_PERF_7821_GREP_OPTS $pattern >'out.$engine' || :
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"
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done
30-
31-
test_expect_success "assert that all engines found the same for$GIT_PERF_7821_GREP_OPTS $pattern" '
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test_cmp out.fixed out.basic &&
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test_cmp out.fixed out.extended &&
34-
if test_have_prereq PCRE
34+
if ! test_have_prereq PERF_GREP_ENGINES_THREADS
3535
then
36-
test_cmp out.fixed out.perl
36+
test_perf $prereq "$engine grep$GIT_PERF_7821_GREP_OPTS $pattern" "
37+
git -c grep.patternType=$engine grep$GIT_PERF_7821_GREP_OPTS $pattern >'out.$engine' || :
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"
39+
else
40+
for threads in $GIT_PERF_GREP_THREADS
41+
do
42+
test_perf PTHREADS,$prereq "$engine grep$GIT_PERF_7821_GREP_OPTS $pattern with $threads threads" "
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git -c grep.patternType=$engine -c grep.threads=$threads grep$GIT_PERF_7821_GREP_OPTS $pattern >'out.$engine.$threads' || :
44+
"
45+
done
3746
fi
38-
'
47+
done
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49+
if ! test_have_prereq PERF_GREP_ENGINES_THREADS
50+
then
51+
test_expect_success "assert that all engines found the same for$GIT_PERF_7821_GREP_OPTS $pattern" '
52+
test_cmp out.fixed out.basic &&
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test_cmp out.fixed out.extended &&
54+
if test_have_prereq PCRE
55+
then
56+
test_cmp out.fixed out.perl
57+
fi
58+
'
59+
else
60+
for threads in $GIT_PERF_GREP_THREADS
61+
do
62+
test_expect_success PTHREADS "assert that all engines found the same for$GIT_PERF_7821_GREP_OPTS $pattern under threading" "
63+
test_cmp out.fixed.$threads out.basic.$threads &&
64+
test_cmp out.fixed.$threads out.extended.$threads &&
65+
if test_have_prereq PCRE
66+
then
67+
test_cmp out.fixed.$threads out.perl.$threads
68+
fi
69+
"
70+
done
71+
fi
3972
done
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test_done

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