From: Dmitry Potapov <dpotapov@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Git Mailing List <git@vger.kernel.org>
Subject: Re: [PATCH 3/3] Avoid doing extra 'lstat()'s for d_type if we have an up-to-date cache entry
Date: Fri, 10 Jul 2009 03:29:21 +0400 [thread overview]
Message-ID: <20090709232921.GC19425@dpotapov.dyndns.org> (raw)
In-Reply-To: <20090709210513.GB19425@dpotapov.dyndns.org>
On Fri, Jul 10, 2009 at 01:05:13AM +0400, Dmitry Potapov wrote:
>
> There is one strange thing though. Before that patch the number of
> 'open' for each directory was always the same in each run. But after
> that patch, it slightly differs in each run... Comparing with results
> without this patch, the number of open for some directories in some
> be less by one... which is puzzling...
It appears that is a purely Windows thing... It seems extra opens for
directories inside of the working tree are caused by Windows Prefetcher.
http://en.wikipedia.org/wiki/Prefetcher
Accordingly to the Process Monitor, during start-up, it opens and reads
most directories in the repo that have subdirectories but sometimes it
skips some of them... So, the patch works as expected... Perhaps, I
should disable this prefetcher for testing to get more reproduceable
results. Anyway, this prefetecher does not issue QueryOpen (stat) for
files in the repo, so my numbers for 'stat' are not affected by it.
Dmitry
next prev parent reply other threads:[~2009-07-09 23:29 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-07 0:05 Too many 'stat' calls by git-status on Windows Dmitry Potapov
2009-07-08 19:49 ` Ramsay Jones
2009-07-09 2:04 ` Linus Torvalds
2009-07-09 2:35 ` Linus Torvalds
2009-07-09 2:40 ` [PATCH 1/3] Add 'fill_directory()' helper function for directory traversal Linus Torvalds
2009-07-09 2:42 ` [PATCH 2/3] Simplify read_directory[_recursive]() arguments Linus Torvalds
2009-07-09 2:43 ` [PATCH 3/3] Avoid doing extra 'lstat()'s for d_type if we have an up-to-date cache entry Linus Torvalds
2009-07-09 8:18 ` Junio C Hamano
2009-07-09 15:52 ` Linus Torvalds
2009-07-09 16:32 ` Junio C Hamano
2009-07-09 16:59 ` Linus Torvalds
2009-07-09 18:34 ` Junio C Hamano
2009-07-09 17:13 ` Linus Torvalds
2009-07-09 17:18 ` Linus Torvalds
2009-07-09 18:37 ` Junio C Hamano
2009-07-09 18:53 ` Linus Torvalds
2009-07-09 20:44 ` [PATCH 4/3] Avoid using 'lstat()' to figure out directories Linus Torvalds
2009-07-09 20:47 ` [PATCH 5/3] Prepare symlink caching for thread-safety Linus Torvalds
2009-07-09 20:48 ` [PATCH 6/3] Export thread-safe version of 'has_symlink_leading_path()' Linus Torvalds
2009-07-09 20:50 ` [PATCH 7/3] Make index preloading check the whole path to the file Linus Torvalds
2009-07-09 20:56 ` Linus Torvalds
2009-07-10 3:12 ` Junio C Hamano
2009-07-10 3:29 ` Linus Torvalds
2009-07-10 3:40 ` Linus Torvalds
2009-07-11 2:53 ` Junio C Hamano
2009-07-11 3:04 ` Linus Torvalds
2009-07-12 0:09 ` [PATCH 6/3] Export thread-safe version of 'has_symlink_leading_path()' Kjetil Barvik
2009-07-12 21:33 ` Junio C Hamano
2009-07-09 22:36 ` [PATCH 4/3] Avoid using 'lstat()' to figure out directories Paolo Bonzini
2009-07-09 23:26 ` Linus Torvalds
2009-07-09 23:52 ` Linus Torvalds
2009-07-10 0:13 ` Linus Torvalds
2009-07-09 23:37 ` Junio C Hamano
2009-07-09 21:05 ` [PATCH 3/3] Avoid doing extra 'lstat()'s for d_type if we have an up-to-date cache entry Dmitry Potapov
2009-07-09 21:52 ` Eric Blake
2009-07-09 23:30 ` [PATCH 3/3] Avoid doing extra 'lstat()'s for d_type if we have?an " Dmitry Potapov
2009-07-10 13:04 ` Dmitry Potapov
2009-07-09 23:29 ` Dmitry Potapov [this message]
2009-07-09 13:50 ` [PATCH 3/3] Avoid doing extra 'lstat()'s for d_type if we have an " Dmitry Potapov
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