From: Samium Gromoff <deepfire@sic-elvis.zel.ru>
To: akpm@osdl.org
Cc: linux-kernel@vger.kernel.org, philip@codematters.co.uk
Subject: Re: 2.6.1 slower than 2.4, smp/scsi/sw-raid/reiserfs
Date: Tue, 03 Feb 2004 09:55:11 +0300 [thread overview]
Message-ID: <87smhsy7n4.wl@canopus.ns.zel.ru> (raw)
> > The machine is a dual P3 450MHz, 512MB, aic7xxx, 2 disk RAID-0 and
> > ReiserFS. It's a few years old and has always run Linux, most
> > recently 2.4.24. I decided to try 2.6.1 and the performance is
> > disappointing.
>
> 2.6 has a few performance problems under heavy pageout at present. Nick
> Piggin has some patches which largely fix it up.
I`m sorry, but this is misguiding. 2.6 does not have a few performance
problems under heavy pageout.
It`s more like _systematical_ _performance_ _degradation_ increasing with
the pageout rate. The more the box pages out the more 2.6 lags behind 2.4.
What i`m trying to say is that even light paging is affected. And light
paging is warranted when you run, say, KDE on 128M ram.
Go measure the X desktop startup time on a 48M/64M boxen--even light paging
causes 2.6 to be just sloower. Also the vm thrashing point is much much earlier.
Ask Roger Luethi for details.
regards, Samium Gromoff
next reply other threads:[~2004-02-03 6:56 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-03 6:55 Samium Gromoff [this message]
2004-02-03 7:07 ` Andrew Morton
2004-02-03 7:52 ` Samium Gromoff
2004-02-03 7:57 ` Nick Piggin
2004-02-03 15:58 ` Valdis.Kletnieks
2004-02-03 7:13 ` Nick Piggin
-- strict thread matches above, loose matches on Subject: below --
2004-02-01 21:34 Philip Martin
2004-02-01 23:11 ` Andrew Morton
2004-02-01 23:42 ` Philip Martin
2004-02-01 23:52 ` Nick Piggin
2004-02-02 0:51 ` Philip Martin
2004-02-02 5:15 ` Nick Piggin
2004-02-02 8:58 ` Nick Piggin
2004-02-02 18:36 ` Philip Martin
2004-02-02 23:36 ` Nick Piggin
2004-02-02 23:49 ` Andrew Morton
2004-02-03 1:01 ` Philip Martin
2004-02-03 3:02 ` Nick Piggin
2004-02-03 16:44 ` Philip Martin
2004-02-03 0:34 ` Philip Martin
2004-02-03 3:52 ` Nick Piggin
2004-02-02 18:08 ` Philip Martin
2004-02-03 3:46 ` Andrew Morton
2004-02-03 16:46 ` Philip Martin
2004-02-03 21:29 ` Andrew Morton
2004-02-03 21:53 ` Philip Martin
2004-02-04 5:48 ` Nick Piggin
2004-02-04 17:50 ` Philip Martin
2004-02-04 23:38 ` Philip Martin
2004-02-05 2:49 ` Nick Piggin
2004-02-05 14:27 ` Philip Martin
2004-02-14 0:10 ` Philip Martin
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