From: Junio C Hamano <gitster@pobox.com>
To: Nicolas Pitre <nico@cam.org>
Cc: Jon Smirl <jonsmirl@gmail.com>, Git Mailing List <git@vger.kernel.org>
Subject: Re: Something is broken in repack
Date: Sat, 08 Dec 2007 14:18:52 -0800 [thread overview]
Message-ID: <7vodd0vnhv.fsf@gitster.siamese.dyndns.org> (raw)
In-Reply-To: <alpine.LFD.0.99999.0712072032410.555@xanadu.home> (Nicolas Pitre's message of "Fri, 07 Dec 2007 20:46:25 -0500 (EST)")
Nicolas Pitre <nico@cam.org> writes:
> On Fri, 7 Dec 2007, Jon Smirl wrote:
>
>> Starting with a 2GB pack of the same data my process size only grew to
>> 3GB with 2GB of mmaps.
>
> Which is quite reasonable, even if the same issue might still be there.
>
> So the problem seems to be related to the pack access code and not the
> repack code. And it must have something to do with the number of deltas
> being replayed. And because the repack is attempting delta compression
> roughly from newest to oldest, and because old objects are typically in
> a deeper delta chain, then this might explain the logarithmic slowdown.
>
> So something must be wrong with the delta cache in sha1_file.c somehow.
I was reaching the same conclusion but haven't managed to spot anything
blatantly wrong in that area. Will need to dig more.
next prev parent reply other threads:[~2007-12-08 22:19 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-07 23:05 Something is broken in repack Jon Smirl
2007-12-08 0:37 ` Linus Torvalds
2007-12-08 1:27 ` [PATCH] pack-objects: fix delta cache size accounting Nicolas Pitre
2007-12-08 1:46 ` Something is broken in repack Nicolas Pitre
2007-12-08 2:04 ` Jon Smirl
2007-12-08 2:28 ` Nicolas Pitre
2007-12-08 3:29 ` Jon Smirl
2007-12-08 3:37 ` David Brown
2007-12-08 4:22 ` Jon Smirl
2007-12-08 4:30 ` Nicolas Pitre
2007-12-08 5:01 ` Jon Smirl
2007-12-08 5:12 ` Nicolas Pitre
2007-12-08 3:48 ` Harvey Harrison
2007-12-08 2:22 ` Jon Smirl
2007-12-08 3:44 ` Harvey Harrison
2007-12-08 22:18 ` Junio C Hamano [this message]
2007-12-09 8:05 ` Junio C Hamano
2007-12-09 15:19 ` Jon Smirl
2007-12-09 18:25 ` Jon Smirl
2007-12-10 1:07 ` Nicolas Pitre
2007-12-10 2:49 ` Nicolas Pitre
2007-12-08 2:56 ` David Brown
2007-12-10 19:56 ` Nicolas Pitre
2007-12-10 20:05 ` Jon Smirl
2007-12-10 20:16 ` Morten Welinder
2007-12-11 2:25 ` Jon Smirl
2007-12-11 2:55 ` Junio C Hamano
2007-12-11 3:27 ` Nicolas Pitre
2007-12-11 11:08 ` David Kastrup
2007-12-11 12:08 ` Pierre Habouzit
2007-12-11 12:18 ` David Kastrup
2007-12-11 3:49 ` Nicolas Pitre
2007-12-11 5:25 ` Jon Smirl
2007-12-11 5:29 ` Jon Smirl
2007-12-11 7:01 ` Jon Smirl
2007-12-11 7:34 ` Andreas Ericsson
2007-12-11 13:49 ` Nicolas Pitre
2007-12-11 15:00 ` Nicolas Pitre
2007-12-11 15:36 ` Jon Smirl
2007-12-11 16:20 ` Nicolas Pitre
2007-12-11 16:21 ` Jon Smirl
2007-12-12 5:12 ` Nicolas Pitre
2007-12-12 8:05 ` David Kastrup
2007-12-14 16:18 ` Wolfram Gloger
2007-12-12 15:48 ` Nicolas Pitre
2007-12-12 16:17 ` Paolo Bonzini
2007-12-12 16:37 ` Linus Torvalds
2007-12-12 16:42 ` David Miller
2007-12-12 16:54 ` Linus Torvalds
2007-12-12 17:12 ` Jon Smirl
2007-12-14 16:12 ` Wolfram Gloger
2007-12-14 16:45 ` David Kastrup
2007-12-14 16:59 ` Wolfram Gloger
2007-12-13 13:32 ` Nguyen Thai Ngoc Duy
2007-12-13 15:32 ` Paolo Bonzini
2007-12-13 16:29 ` Paolo Bonzini
2007-12-13 16:39 ` Johannes Sixt
2007-12-14 1:04 ` Jakub Narebski
2007-12-14 6:14 ` Paolo Bonzini
2007-12-14 6:24 ` Nguyen Thai Ngoc Duy
2007-12-14 8:20 ` Paolo Bonzini
2007-12-14 9:01 ` Harvey Harrison
2007-12-14 10:40 ` Jakub Narebski
2007-12-14 10:52 ` Nguyen Thai Ngoc Duy
2007-12-14 13:25 ` Nicolas Pitre
2007-12-12 16:13 ` Nicolas Pitre
2007-12-13 7:32 ` Andreas Ericsson
2007-12-14 16:03 ` Wolfram Gloger
2007-12-11 16:33 ` Linus Torvalds
2007-12-11 17:21 ` Nicolas Pitre
2007-12-11 17:24 ` David Miller
2007-12-11 17:44 ` Nicolas Pitre
2007-12-11 20:26 ` Andreas Ericsson
2007-12-11 18:43 ` Jon Smirl
2007-12-11 18:57 ` Nicolas Pitre
2007-12-11 19:17 ` Linus Torvalds
2007-12-11 19:40 ` Junio C Hamano
2007-12-11 20:34 ` Andreas Ericsson
2007-12-11 17:28 ` Daniel Berlin
2007-12-11 13:31 ` Nicolas Pitre
2007-12-11 6:01 ` Sean
2007-12-11 6:20 ` Jon Smirl
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