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From: Ramsay Jones <ramsay@ramsayjones.plus.com>
To: Stefan Beller <sbeller@google.com>
Cc: "git@vger.kernel.org" <git@vger.kernel.org>,
	Jacob Keller <jacob.keller@gmail.com>, Jeff King <peff@peff.net>,
	Junio C Hamano <gitster@pobox.com>,
	Jonathan Nieder <jrnieder@gmail.com>,
	Johannes Schindelin <johannes.schindelin@gmail.com>,
	Jens Lehmann <Jens.Lehmann@web.de>,
	Eric Sunshine <ericsunshine@gmail.com>
Subject: Re: [PATCHv2 0/8] Expose the submodule parallelism to the user
Date: Thu, 29 Oct 2015 23:50:57 +0000	[thread overview]
Message-ID: <5632B0E1.8040309@ramsayjones.plus.com> (raw)
In-Reply-To: <CAGZ79kYXrOFDqs5c-OYG2vRO9GY_aoD_GU1=TkRtOMaGC_GowA@mail.gmail.com>



On 29/10/15 15:51, Stefan Beller wrote:
> On Thu, Oct 29, 2015 at 6:19 AM, Ramsay Jones
> <ramsay@ramsayjones.plus.com> wrote:
> 
>> Hmm, is there a way to _not_ fetch in parallel (override the
>> config) from the command line for a given command?
>>
>> ATB,
>> Ramsay Jones
> 
> git config submodule.jobs 42
> git <foo> --jobs 1 # should run just one task, despite having 42 configured

Heh, yes ... I didn't pose the question quite right ...
> 
> It does use the parallel processing machinery though, but with a maximum of
> one subcommand being spawned. Is that what you're asking?

... but, despite that, you correctly inferred what I was really
asking about! :)

I was just wondering what overhead the parallel processing machinery
adds to the original 'non-parallel' code path (for the j=1 case).
I suspect the answer is 'not much', but that's just a guess.
Have you measured it? What happens if there is only a single
submodule to fetch?

ATB,
Ramsay Jones

  parent reply	other threads:[~2015-10-29 23:51 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-27 18:15 [PATCH 0/9] Expose the submodule parallelism to the user Stefan Beller
2015-10-27 18:15 ` [PATCH 1/9] submodule-config: "goto" removal in parse_config() Stefan Beller
2015-10-27 21:26   ` Jonathan Nieder
2015-10-27 21:39     ` Junio C Hamano
2015-10-27 18:15 ` [PATCH 2/9] submodule config: keep update strategy around Stefan Beller
2015-10-27 18:15 ` [PATCH 3/9] run_processes_parallel: Add output to tracing messages Stefan Beller
2015-10-27 18:15 ` [PATCH 4/9] git submodule update: have a dedicated helper for cloning Stefan Beller
2015-10-27 18:15 ` [PATCH 5/9] submodule update: expose parallelism to the user Stefan Beller
2015-10-27 20:59   ` Junio C Hamano
2015-10-28 21:40     ` Stefan Beller
2015-10-28 22:20       ` Junio C Hamano
2015-10-27 18:15 ` [PATCH 6/9] clone: allow an explicit argument for parallel submodule clones Stefan Beller
2015-10-27 20:57   ` Junio C Hamano
2015-10-28 20:50     ` Stefan Beller
2015-10-27 18:15 ` [PATCH 7/9] submodule config: remove name_and_item_from_var Stefan Beller
2015-10-27 18:15 ` [PATCH 8/9] submodule-config: parse_config Stefan Beller
2015-10-27 18:15 ` [PATCH 9/9] fetching submodules: Respect `submodule.jobs` config option Stefan Beller
2015-10-27 21:00   ` Junio C Hamano
2015-10-27 19:12 ` [PATCH 0/9] Expose the submodule parallelism to the user Junio C Hamano
2015-10-28 23:21   ` [PATCHv2 0/8] " Stefan Beller
2015-10-28 23:21     ` [PATCHv2 1/8] run_processes_parallel: Add output to tracing messages Stefan Beller
2015-10-30  1:10       ` Eric Sunshine
2015-10-30 17:32         ` Stefan Beller
2015-10-28 23:21     ` [PATCHv2 2/8] submodule config: keep update strategy around Stefan Beller
2015-10-30  1:14       ` Eric Sunshine
2015-10-30 17:38         ` Stefan Beller
2015-10-30 18:16           ` Eric Sunshine
2015-10-30 18:25             ` Stefan Beller
2015-10-28 23:21     ` [PATCHv2 3/8] submodule config: remove name_and_item_from_var Stefan Beller
2015-10-30  1:23       ` Eric Sunshine
2015-10-30 18:37         ` Stefan Beller
2015-10-28 23:21     ` [PATCHv2 4/8] submodule-config: parse_config Stefan Beller
2015-10-30  1:53       ` Eric Sunshine
2015-10-30 19:29         ` Stefan Beller
2015-10-28 23:21     ` [PATCHv2 5/8] fetching submodules: Respect `submodule.jobs` config option Stefan Beller
2015-10-30  2:17       ` Eric Sunshine
2015-10-28 23:21     ` [PATCHv2 6/8] git submodule update: have a dedicated helper for cloning Stefan Beller
2015-10-29 22:34       ` Junio C Hamano
2015-10-28 23:21     ` [PATCHv2 7/8] submodule update: expose parallelism to the user Stefan Beller
2015-10-28 23:21     ` [PATCHv2 8/8] clone: allow an explicit argument for parallel submodule clones Stefan Beller
2015-11-01  8:58       ` Eric Sunshine
2015-10-29 13:19     ` [PATCHv2 0/8] Expose the submodule parallelism to the user Ramsay Jones
2015-10-29 15:51       ` Stefan Beller
2015-10-29 17:23         ` Junio C Hamano
2015-10-29 17:30           ` Stefan Beller
2015-10-29 23:50         ` Ramsay Jones [this message]
2015-11-03 19:41           ` Stefan Beller
2015-10-29 20:12     ` Junio C Hamano

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