From: Andrew Morton <akpm@digeo.com>
To: Vladimir Saveliev <vs@namesys.com>
Cc: linux-kernel@vger.kernel.org, reiserfs-dev@namesys.com
Subject: Re: file write performance drop between 2.5.60 and 2.5.70
Date: Wed, 4 Jun 2003 18:52:28 -0700 [thread overview]
Message-ID: <20030604185228.5cfc6b02.akpm@digeo.com> (raw)
In-Reply-To: <200306042017.53435.vs@namesys.com>
Vladimir Saveliev <vs@namesys.com> wrote:
>
> Hi
>
> It looks like file write performance dropped somewhere between 2.5.60 and
> 2.5.70.
> Doing
> time dd if=/dev/zero of=file bs=4096 count=60000
>
> on a box with Xeon(TM) CPU 2.40GHz and 1gb of RAM
> I get for ext2
> 2.5.60: real 1.42 sys 0.77
> 2.5.70: real 1.73 sys 1.23
> for reiserfs
> 2.5.60: real 1.62 sys 1.56
> 2.5.70: real 1.90 sys 1.86
>
> Any ideas of what could cause this drop?
>
hm, 2.5.60 was a long time ago. The best way to tell would be comparative
oprofiling.
prev parent reply other threads:[~2003-06-05 1:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-04 16:17 file write performance drop between 2.5.60 and 2.5.70 Vladimir Saveliev
2003-06-04 18:02 ` Felipe Alfaro Solana
2003-06-05 18:37 ` Mike Fedyk
2003-06-05 19:24 ` Felipe Alfaro Solana
2003-06-05 19:27 ` OFFTOPIC: " uaca
2003-06-05 1:52 ` Andrew Morton [this message]
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