From: Andrew Morton <akpm@zip.com.au>
To: Ben Israel <ben@genesis-one.com>
Cc: linux-kernel@vger.kernel.org, "John O'Neil" <joneil@genesis-one.com>
Subject: Re: File System Performance
Date: Mon, 12 Nov 2001 08:33:21 -0800 [thread overview]
Message-ID: <3BEFF9D1.3CC01AB3@zip.com.au> (raw)
In-Reply-To: <00b201c16b81$9d7aaba0$5101a8c0@pbc.adelphia.net>
Ben Israel wrote:
>
> ...
> 128M SDRAM
> ...
> time cp -r /usr/src/linux-2.4.6 tst
> ...
> 2*144MB/48s=6MB/sec
>
There was some discussion about this last week. It appears to
be due to ext2's directory placement policy. Al Viro has a
patch which implements the "Orlov allocator" which FreeBSD are
using.
It works, and it'll get you close to disk bandwidth with this test.
But the effects of this change on other workloads (the so-called
"slow growth" scenario) still needs to be understood and tested.
-
next prev parent reply other threads:[~2001-11-12 16:34 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-12 13:54 File System Performance Ben Israel
2001-11-12 16:33 ` Andrew Morton [this message]
2001-11-12 17:50 ` Ben Israel
2001-11-12 19:46 ` Andrew Morton
2001-11-12 19:59 ` Richard Gooch
2001-11-12 23:07 ` Mike Fedyk
2001-11-13 0:04 ` Richard Gooch
2001-11-13 0:08 ` Mike Fedyk
2001-11-13 0:26 ` Richard Gooch
2001-11-13 0:47 ` Mike Castle
2001-11-13 1:28 ` Mike Fedyk
2001-11-13 6:34 ` Richard Gooch
2001-11-13 20:56 ` Andreas Dilger
2001-11-13 7:45 ` Andreas Dilger
2001-11-12 20:06 ` Steve Lord
2001-11-12 20:41 ` Andrew Morton
2001-11-12 21:27 ` Steve Lord
2001-11-12 21:43 ` Andrew Morton
2001-11-12 21:45 ` Steve Lord
2001-11-12 21:48 ` Linus Torvalds
2001-11-12 22:11 ` Lionel Bouton
2001-11-12 19:41 ` Gérard Roudier
2001-11-12 22:14 ` Linus Torvalds
2001-11-12 22:30 ` Ragnar Kjørstad
2001-11-12 22:36 ` Andrew Morton
2001-11-12 23:04 ` Mike Castle
2001-11-13 9:56 ` Peter Wächtler
2001-11-13 9:41 ` Henning P. Schmiedehausen
2001-11-12 22:16 ` Andrew Morton
2001-11-12 22:26 ` Steve Lord
2001-11-12 22:32 ` Lionel Bouton
2001-11-12 22:45 ` Alan Cox
2001-11-12 22:39 ` Alan Cox
2001-11-12 22:39 ` Xavier Bestel
2001-11-12 22:46 ` Mike Castle
2001-11-12 21:53 ` Lionel Bouton
2001-11-13 0:17 ` Andreas Dilger
2001-11-13 0:40 ` Peter J . Braam
2001-11-13 20:46 ` Andreas Dilger
2001-11-16 22:07 ` Peter J . Braam
2001-11-16 23:14 ` Mike Fedyk
2001-11-12 16:40 ` Ben Israel
2001-11-12 17:29 ` Andrew Morton
-- strict thread matches above, loose matches on Subject: below --
2001-11-12 22:36 Grant Erickson
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