From: David Woodhouse <dwmw2@infradead.org>
To: "Jörn Engel" <joern@logfs.org>
Cc: linux-mtd@lists.infradead.org,
Matthieu CASTET <matthieu.castet@parrot.com>
Subject: Re: Jffs2 and big file = very slow jffs2_garbage_collect_pass
Date: Fri, 18 Jan 2008 07:22:21 +0800 [thread overview]
Message-ID: <1200612141.14882.83.camel@shinybook.infradead.org> (raw)
In-Reply-To: <20080117162601.GA6677@lazybastard.org>
On Thu, 2008-01-17 at 17:26 +0100, Jörn Engel wrote:
>
> Impressive! JFFS2 may be slow, but it shouldn't be _that_ slow. Not
> sure who cares enough to look at this. My approach would be to
> $ echo t > /proc/sysrq_trigger
> several times during those 12 minutes and take a close look at the
> code
> paths showing up. Most likely it will spend 99% of the time in one
> place.
I was going to suggest booting with 'profile=1' and using readprofile,
which is a slightly more reliable way of getting the same information.
--
dwmw2
next prev parent reply other threads:[~2008-01-17 23:22 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-17 16:12 Jffs2 and big file = very slow jffs2_garbage_collect_pass Matthieu CASTET
2008-01-17 16:26 ` Jörn Engel
2008-01-17 17:43 ` Josh Boyer
2008-01-18 9:39 ` Matthieu CASTET
2008-01-18 12:48 ` Josh Boyer
2008-01-18 16:17 ` Matthieu CASTET
2008-01-18 17:55 ` Josh Boyer
2008-01-18 18:17 ` Jörn Engel
2008-01-21 15:57 ` Matthieu CASTET
2008-01-21 21:25 ` Jörn Engel
2008-01-21 22:16 ` Josh Boyer
2008-01-21 22:29 ` Jörn Engel
2008-01-22 8:57 ` Matthieu CASTET
2008-01-22 12:03 ` Jörn Engel
2008-01-22 13:24 ` Ricard Wanderlof
2008-01-22 15:05 ` Jörn Engel
2008-01-23 9:23 ` Ricard Wanderlof
2008-01-23 10:19 ` Jörn Engel
2008-01-23 10:41 ` Ricard Wanderlof
2008-01-23 10:57 ` Jörn Engel
2008-01-23 11:57 ` Ricard Wanderlof
2008-01-23 13:01 ` Jörn Engel
2008-01-23 13:16 ` Ricard Wanderlof
2008-01-23 14:06 ` Jörn Engel
2008-01-23 14:25 ` Ricard Wanderlof
2008-01-21 22:36 ` Glenn Henshaw
2008-01-18 17:20 ` Glenn Henshaw
2008-01-18 18:39 ` Jamie Lokier
2008-01-18 21:00 ` Jörn Engel
2008-01-19 0:23 ` Jamie Lokier
2008-01-19 2:38 ` Jörn Engel
2008-01-17 23:22 ` David Woodhouse [this message]
2008-01-18 9:45 ` Matthieu CASTET
2008-01-18 18:20 ` Jamie Lokier
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