From: Marcelo Tosatti <marcelo@conectiva.com.br>
To: Daniel Phillips <phillips@bonn-fries.net>
Cc: linux-mm@kvack.org, Steven Cole <elenstev@mesatop.com>,
Roger Larsson <roger.larsson@skelleftea.mail.telia.com>
Subject: Re: 2.4.8-pre1 and dbench -20% throughput
Date: Sat, 28 Jul 2001 10:40:30 -0300 (BRT) [thread overview]
Message-ID: <Pine.LNX.4.21.0107281035380.5720-100000@freak.distro.conectiva> (raw)
In-Reply-To: <01072805183900.00293@starship>
On Sat, 28 Jul 2001, Daniel Phillips wrote:
> On Saturday 28 July 2001 01:43, Roger Larsson wrote:
> > Hi again,
> >
> > It might be variations in dbench - but I am not sure since I run
> > the same script each time.
>
> I believe I can reproduce the effect here, even with dbench 2. So the
> next two steps:
>
> 1) Get some sleep
> 2) Find out why
I would suggest getting the SAR patch to measure amount of successful
request merges and compare that between the different kernels.
It sounds like the test being done is doing a lot of contiguous IO, so
increasing readahead also increases throughtput.
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next prev parent reply other threads:[~2001-07-28 13:40 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200107272112.f6RLC3d28206@maila.telia.com>
[not found] ` <0107280034050V.00285@starship>
2001-07-27 23:43 ` Roger Larsson
2001-07-28 1:11 ` Daniel Phillips
2001-07-28 3:18 ` Daniel Phillips
2001-07-28 13:40 ` Marcelo Tosatti [this message]
2001-07-28 20:13 ` Daniel Phillips
2001-07-28 20:26 ` Linus Torvalds
2001-07-29 14:10 ` Daniel Phillips
2001-07-29 14:48 ` Rik van Riel
2001-07-29 15:34 ` Daniel Phillips
2001-07-29 15:31 ` Mike Galbraith
2001-07-29 16:05 ` Linus Torvalds
2001-07-29 20:19 ` Hugh Dickins
2001-07-29 20:25 ` Rik van Riel
2001-07-29 20:44 ` Hugh Dickins
2001-07-29 21:20 ` Daniel Phillips
2001-07-29 21:51 ` Hugh Dickins
2001-07-29 23:23 ` Rik van Riel
2001-07-31 7:30 ` Kai Henningsen
2001-07-31 14:13 ` Daniel Phillips
2001-07-31 17:37 ` Jonathan Morton
2001-07-29 1:41 ` Andrew Morton
2001-07-29 14:39 ` Daniel Phillips
2001-07-30 3:19 ` Theodore Tso
2001-07-30 15:17 ` Randy.Dunlap
2001-07-30 16:41 ` Theodore Tso
2001-07-30 17:52 ` Mike Galbraith
2001-07-30 19:39 ` Zlatko Calusic
2001-07-29 17:48 ` Steven Cole
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