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From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>, "Jeff King" <peff@peff.net>,
	"Jeffrey Walton" <noloader@gmail.com>,
	"Michał Kiedrowicz" <michal.kiedrowicz@gmail.com>,
	"J Smith" <dark.panda@gmail.com>,
	"Victor Leschuk" <vleschuk@gmail.com>,
	"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>,
	"Fredrik Kuivinen" <frekui@gmail.com>,
	"Brandon Williams" <bmwill@google.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: [PATCH v3 09/30] grep: add tests for --threads=N and grep.threads
Date: Sat, 20 May 2017 21:42:12 +0000	[thread overview]
Message-ID: <20170520214233.7183-10-avarab@gmail.com> (raw)
In-Reply-To: <20170520214233.7183-1-avarab@gmail.com>

Add tests for --threads=N being supplied on the command-line, or when
grep.threads=N being supplied in the configuration.

When the threading support was made run-time configurable in commit
89f09dd34e ("grep: add --threads=<num> option and grep.threads
configuration", 2015-12-15) no tests were added for it.

In developing a change to the grep code I was able to make
'--threads=1 <pat>` segfault, while the test suite still passed. This
change fixes that blind spot in the tests.

In addition to asserting that asking for N threads shouldn't segfault,
test that the grep output given any N is the same.

The choice to test only 1..10 as opposed to 1..8 or 1..16 or whatever
is arbitrary. Testing 1..1024 works locally for me (but gets
noticeably slower as more threads are spawned). Given the structure of
the code there's no reason to test an arbitrary number of threads,
only 0, 1 and >=2 are special modes of operation.

A later patch introduces a PTHREADS test prerequisite which is true
under NO_PTHREADS=UnfortunatelyYes, but even under NO_PTHREADS it's
fine to test --threads=N, we'll just ignore it and not use
threading. So these tests also make sense under that mode to assert
that --threads=N without pthreads still returns expected results.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 t/t7810-grep.sh | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh
index daa906b9b0..561709ef6a 100755
--- a/t/t7810-grep.sh
+++ b/t/t7810-grep.sh
@@ -775,6 +775,22 @@ test_expect_success 'grep -W with userdiff' '
 	test_cmp expected actual
 '
 
+for threads in $(test_seq 0 10)
+do
+	test_expect_success "grep --threads=$threads & -c grep.threads=$threads" "
+		git grep --threads=$threads . >actual.$threads &&
+		if test $threads -ge 1
+		then
+			test_cmp actual.\$(($threads - 1)) actual.$threads
+		fi &&
+		git -c grep.threads=$threads grep . >actual.$threads &&
+		if test $threads -ge 1
+		then
+			test_cmp actual.\$(($threads - 1)) actual.$threads
+		fi
+	"
+done
+
 test_expect_success 'grep from a subdirectory to search wider area (1)' '
 	mkdir -p s &&
 	(
-- 
2.13.0.303.g4ebf302169


  parent reply	other threads:[~2017-05-20 21:43 UTC|newest]

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-20 21:42 [PATCH v3 00/30] Easy to review grep & pre-PCRE changes Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 01/30] Makefile & configure: reword inaccurate comment about PCRE Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 02/30] grep & rev-list doc: stop promising libpcre for --perl-regexp Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 03/30] test-lib: rename the LIBPCRE prerequisite to PCRE Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 04/30] log: add exhaustive tests for pattern style options & config Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 05/30] log: make --regexp-ignore-case work with --perl-regexp Ævar Arnfjörð Bjarmason
2017-05-20 23:50   ` Junio C Hamano
2017-05-21  6:58     ` Ævar Arnfjörð Bjarmason
2017-05-22  0:17       ` Junio C Hamano
2017-06-28 21:58       ` [PATCH 0/5] grep: remove redundant code & reflags from API Ævar Arnfjörð Bjarmason
2017-06-29 22:22         ` [PATCH v2 0/6] " Ævar Arnfjörð Bjarmason
2017-06-29 22:22         ` [PATCH v2 1/6] grep: remove redundant double assignment to 0 Ævar Arnfjörð Bjarmason
2017-06-29 22:22         ` [PATCH v2 2/6] grep: adjust a redundant grep pattern type assignment Ævar Arnfjörð Bjarmason
2017-06-29 22:22         ` [PATCH v2 3/6] grep: remove redundant "fixed" field re-assignment to 0 Ævar Arnfjörð Bjarmason
2017-06-29 22:22         ` [PATCH v2 4/6] grep: remove redundant and verbose re-assignments " Ævar Arnfjörð Bjarmason
2017-06-29 22:22         ` [PATCH v2 5/6] grep: remove regflags from the public grep_opt API Ævar Arnfjörð Bjarmason
2017-06-30 17:20           ` Junio C Hamano
2017-06-29 22:22         ` [PATCH v2 6/6] grep: remove redundant REG_NEWLINE when compiling fixed regex Ævar Arnfjörð Bjarmason
2017-06-28 21:58       ` [PATCH 1/5] grep: remove redundant double assignment to 0 Ævar Arnfjörð Bjarmason
2017-06-28 21:58       ` [PATCH 2/5] grep: remove redundant grep pattern type assignment Ævar Arnfjörð Bjarmason
2017-06-29 17:03         ` Stefan Beller
2017-06-29 17:50           ` Ævar Arnfjörð Bjarmason
2017-06-28 21:58       ` [PATCH 3/5] grep: remove redundant "fixed" field re-assignment to 0 Ævar Arnfjörð Bjarmason
2017-06-29 17:10         ` Stefan Beller
2017-06-28 21:58       ` [PATCH 4/5] grep: remove redundant and verbose re-assignments " Ævar Arnfjörð Bjarmason
2017-06-28 21:58       ` [PATCH 5/5] grep: remove regflags from the public grep_opt API Ævar Arnfjörð Bjarmason
2017-06-29 17:43         ` Stefan Beller
2017-06-29 18:16           ` Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 06/30] grep: add a test asserting that --perl-regexp dies when !PCRE Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 07/30] grep: add a test for backreferences in PCRE patterns Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 08/30] grep: change non-ASCII -i test to stop using --debug Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` Ævar Arnfjörð Bjarmason [this message]
2017-05-20 21:42 ` [PATCH v3 10/30] grep: amend submodule recursion test for regex engine testing Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 11/30] grep: add tests for grep pattern types being passed to submodules Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 12/30] grep: add a test helper function for less verbose -f \0 tests Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 13/30] grep: prepare for testing binary regexes containing rx metacharacters Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 14/30] grep: add tests to fix blind spots with \0 patterns Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 15/30] perf: add a GIT_PERF_MAKE_COMMAND for when *_MAKE_OPTS won't do Ævar Arnfjörð Bjarmason
2017-05-20 23:50   ` Junio C Hamano
2017-05-21  6:23     ` Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 16/30] perf: emit progress output when unpacking & building Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 17/30] perf: add a comparison test of grep regex engines Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 18/30] perf: add a comparison test of grep regex engines with -F Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 19/30] perf: add a comparison test of log --grep regex engines Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 20/30] grep: catch a missing enum in switch statement Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 21/30] grep: remove redundant regflags assignments Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 22/30] grep: factor test for \0 in grep patterns into a function Ævar Arnfjörð Bjarmason
2017-05-23 21:17   ` Brandon Williams
2017-05-20 21:42 ` [PATCH v3 23/30] grep: change the internal PCRE macro names to be PCRE1 Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 24/30] grep: change internal *pcre* variable & function names to be *pcre1* Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 25/30] grep: move is_fixed() earlier to avoid forward declaration Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 26/30] test-lib: add a PTHREADS prerequisite Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 27/30] pack-objects & index-pack: add test for --threads warning Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 28/30] pack-objects: fix buggy warning about threads Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 29/30] grep: given --threads with NO_PTHREADS=YesPlease, warn Ævar Arnfjörð Bjarmason
2017-05-20 21:42 ` [PATCH v3 30/30] grep: assert that threading is enabled when calling grep_{lock,unlock} Ævar Arnfjörð Bjarmason
2017-05-20 23:50 ` [PATCH v3 00/30] Easy to review grep & pre-PCRE changes Junio C Hamano
2017-05-23 19:24   ` [PATCH v2 0/7] PCRE v2, PCRE v1 JIT, log -P & fixes Ævar Arnfjörð Bjarmason
2017-05-23 19:24   ` [PATCH v2 1/7] grep: don't redundantly compile throwaway patterns under threading Ævar Arnfjörð Bjarmason
2017-05-24  4:42     ` Junio C Hamano
2017-05-25 10:33       ` Ævar Arnfjörð Bjarmason
2017-05-26  0:58         ` Junio C Hamano
2017-05-26  8:06           ` Ævar Arnfjörð Bjarmason
2017-05-26  9:49             ` Junio C Hamano
2017-05-23 19:24   ` [PATCH v2 2/7] grep: skip pthreads overhead when using one thread Ævar Arnfjörð Bjarmason
2017-05-24  4:45     ` Junio C Hamano
2017-05-23 19:24   ` [PATCH v2 3/7] log: add -P as a synonym for --perl-regexp Ævar Arnfjörð Bjarmason
2017-05-23 19:24   ` [PATCH v2 4/7] grep: add support for the PCRE v1 JIT API Ævar Arnfjörð Bjarmason
2017-05-24  5:17     ` Junio C Hamano
2017-05-24  7:37       ` Ævar Arnfjörð Bjarmason
2017-05-23 19:24   ` [PATCH v2 5/7] grep: un-break building with PCRE < 8.32 Ævar Arnfjörð Bjarmason
2017-05-24  6:00     ` Junio C Hamano
2017-05-24  6:38       ` Junio C Hamano
2017-05-23 19:24   ` [PATCH v2 6/7] grep: un-break building with PCRE < 8.20 Ævar Arnfjörð Bjarmason
2017-05-23 19:24   ` [PATCH v2 7/7] grep: add support for PCRE v2 Ævar Arnfjörð Bjarmason
2017-05-24  6:23     ` Junio C Hamano
2017-05-25  9:49       ` Ævar Arnfjörð Bjarmason

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