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From: Stefan Beller <sbeller@google.com>
To: git@vger.kernel.org
Cc: ramsay@ramsayjones.plus.com, jacob.keller@gmail.com,
	peff@peff.net, gitster@pobox.com, jrnieder@gmail.com,
	johannes.schindelin@gmail.com, Jens.Lehmann@web.de,
	ericsunshine@gmail.com, j6t@kdbg.org,
	Stefan Beller <sbeller@google.com>
Subject: [PATCHv4 6/9] fetching submodules: respect `submodule.jobs` config option
Date: Fri, 13 Nov 2015 17:06:59 -0800	[thread overview]
Message-ID: <1447463222-12589-7-git-send-email-sbeller@google.com> (raw)
In-Reply-To: <1447463222-12589-1-git-send-email-sbeller@google.com>

This allows to configure fetching and updating in parallel
without having the command line option.

This moved the responsibility to determine how many parallel processes
to start from builtin/fetch to submodule.c as we need a way to communicate
"The user did not specify the number of parallel processes in the command
line options" in the builtin fetch. The submodule code takes care of
the precedence (CLI > config > default)

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 Documentation/config.txt    |  7 +++++++
 builtin/fetch.c             |  2 +-
 submodule-config.c          | 15 +++++++++++++++
 submodule-config.h          |  2 ++
 submodule.c                 |  5 +++++
 t/t5526-fetch-submodules.sh | 14 ++++++++++++++
 6 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index 391a0c3..9e7c14c 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -2643,6 +2643,13 @@ submodule.<name>.ignore::
 	"--ignore-submodules" option. The 'git submodule' commands are not
 	affected by this setting.
 
+submodule.fetchJobs::
+	This is used to determine how many submodules will be
+	fetched/cloned at the same time. Specifying a positive integer
+	allows up to that number of submodules being fetched in parallel.
+	This is used in fetch and clone operations only. A value of 0 will
+	give some reasonable configuration. It defaults to 1.
+
 tag.sort::
 	This variable controls the sort ordering of tags when displayed by
 	linkgit:git-tag[1]. Without the "--sort=<value>" option provided, the
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 9cc1c9d..60e6797 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -37,7 +37,7 @@ static int prune = -1; /* unspecified */
 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity;
 static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
 static int tags = TAGS_DEFAULT, unshallow, update_shallow;
-static int max_children = 1;
+static int max_children = -1;
 static const char *depth;
 static const char *upload_pack;
 static struct strbuf default_rla = STRBUF_INIT;
diff --git a/submodule-config.c b/submodule-config.c
index 29e21b2..a32259e 100644
--- a/submodule-config.c
+++ b/submodule-config.c
@@ -32,6 +32,7 @@ enum lookup_type {
 
 static struct submodule_cache cache;
 static int is_cache_init;
+static int parallel_jobs = -1;
 
 static int config_path_cmp(const struct submodule_entry *a,
 			   const struct submodule_entry *b,
@@ -239,6 +240,15 @@ static int parse_generic_submodule_config(const char *key,
 					  const char *value,
 					  struct parse_config_parameter *me)
 {
+	if (!strcmp(key, "fetchjobs")) {
+		parallel_jobs = strtol(value, NULL, 10);
+		if (parallel_jobs < 0) {
+			warning("submodule.fetchJobs not allowed to be negative.");
+			parallel_jobs = 1;
+			return 1;
+		}
+	}
+
 	return 0;
 }
 
@@ -482,3 +492,8 @@ void submodule_free(void)
 	cache_free(&cache);
 	is_cache_init = 0;
 }
+
+int config_parallel_submodules(void)
+{
+	return parallel_jobs;
+}
diff --git a/submodule-config.h b/submodule-config.h
index f9e2a29..d9bbf9a 100644
--- a/submodule-config.h
+++ b/submodule-config.h
@@ -27,4 +27,6 @@ const struct submodule *submodule_from_path(const unsigned char *commit_sha1,
 		const char *path);
 void submodule_free(void);
 
+int config_parallel_submodules(void);
+
 #endif /* SUBMODULE_CONFIG_H */
diff --git a/submodule.c b/submodule.c
index c6350eb..e73f850 100644
--- a/submodule.c
+++ b/submodule.c
@@ -749,6 +749,11 @@ int fetch_populated_submodules(const struct argv_array *options,
 	argv_array_push(&spf.args, "--recurse-submodules-default");
 	/* default value, "--submodule-prefix" and its value are added later */
 
+	if (max_parallel_jobs < 0)
+		max_parallel_jobs = config_parallel_submodules();
+	if (max_parallel_jobs < 0)
+		max_parallel_jobs = 1;
+
 	calculate_changed_submodule_paths();
 	run_processes_parallel(max_parallel_jobs,
 			       get_next_submodule,
diff --git a/t/t5526-fetch-submodules.sh b/t/t5526-fetch-submodules.sh
index 1b4ce69..6671994 100755
--- a/t/t5526-fetch-submodules.sh
+++ b/t/t5526-fetch-submodules.sh
@@ -470,4 +470,18 @@ test_expect_success "don't fetch submodule when newly recorded commits are alrea
 	test_i18ncmp expect.err actual.err
 '
 
+test_expect_success 'fetching submodules respects parallel settings' '
+	git config fetch.recurseSubmodules true &&
+	(
+		cd downstream &&
+		GIT_TRACE=$(pwd)/trace.out git fetch --jobs 7 &&
+		grep "7 tasks" trace.out &&
+		git config submodule.fetchJobs 8 &&
+		GIT_TRACE=$(pwd)/trace.out git fetch &&
+		grep "8 tasks" trace.out &&
+		GIT_TRACE=$(pwd)/trace.out git fetch --jobs 9 &&
+		grep "9 tasks" trace.out
+	)
+'
+
 test_done
-- 
2.6.3.369.gea52ac0

  parent reply	other threads:[~2015-11-14  1:07 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-14  1:06 [PATCHv4 0/9] Expose submodule parallelism to the user Stefan Beller
2015-11-14  1:06 ` [PATCHv4 1/9] run_processes_parallel: delimit intermixed task output Stefan Beller
2015-11-14  1:06 ` [PATCHv4 2/9] submodule-config: keep update strategy around Stefan Beller
2015-11-14  1:06 ` [PATCHv4 3/9] submodule-config: drop check against NULL Stefan Beller
2015-11-14  1:06 ` [PATCHv4 4/9] submodule-config: remove name_and_item_from_var Stefan Beller
2015-11-14  1:06 ` [PATCHv4 5/9] submodule-config: introduce parse_generic_submodule_config Stefan Beller
2015-11-14  1:06 ` Stefan Beller [this message]
2015-11-14  1:07 ` [PATCHv4 7/9] git submodule update: have a dedicated helper for cloning Stefan Beller
2015-11-14  1:07 ` [PATCHv4 8/9] submodule update: expose parallelism to the user Stefan Beller
2015-11-14  1:07 ` [PATCHv4 9/9] clone: allow an explicit argument for parallel submodule clones Stefan Beller
2015-11-20 12:02 ` [PATCHv4 0/9] Expose submodule parallelism to the user Jeff King

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