From: Andrew Morton <akpm@osdl.org>
To: maryedie@osdl.org
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: 2.6.4-mm2
Date: Mon, 22 Mar 2004 16:27:29 -0800 [thread overview]
Message-ID: <20040322162729.2f2ddbe4.akpm@osdl.org> (raw)
In-Reply-To: <1079975940.23641.580.camel@localhost>
Mary Edie Meredith <maryedie@osdl.org> wrote:
>
> [was "Poor DBT-3 pgsql 8way numbers on recent 2.6 mm kernels" on
> linux-mm]
>
> Andrew,
>
> This same patch (02) applied in STP (plm 2780) when run against
> dbt3-pgsql DSS workload displays the performance problem with the
> throughput numbers that I reported on linux-mm on our 8way systems,
> where the previous patch (plm 2777 -01) does not.
>
> Here is the data (patches applied to 2.6.5-rc1)
>
> PLM.....CPUs.Runid..Thruput Metric (bigger is better)
> 2777(01) 8 290298 138.22 (base )
> 2779(02) 8 290304 88.57 (-35.9%)
36% regression due to the CPU scheduler changes? ow.
And that machine is a PIII, so presumably the setting of CONFIG_SCHED_SMT
makes no difference.
>From a quick look at the material you have there it appears that this
workload also is very I/O bound. It's a little surprising that the CPU
scheduler could make so much difference.
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next prev parent reply other threads:[~2004-03-23 0:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20040314172809.31bd72f7.akpm@osdl.org>
[not found] ` <200403181737.i2IHbCE09261@mail.osdl.org>
[not found] ` <20040318100615.7f2943ea.akpm@osdl.org>
[not found] ` <20040318192707.GV22234@suse.de>
[not found] ` <20040318191530.34e04cb2.akpm@osdl.org>
[not found] ` <20040318194150.4de65049.akpm@osdl.org>
[not found] ` <20040319183906.I8594@osdlab.pdx.osdl.net>
2004-03-22 17:19 ` 2.6.4-mm2 Mary Edie Meredith
2004-03-23 0:27 ` Andrew Morton [this message]
2004-03-23 19:21 ` 2.6.4-mm2 Mary Edie Meredith
2004-03-23 19:32 ` 2.6.4-mm2 Andrew Morton
2004-03-24 0:07 ` 2.6.4-mm2 Mary Edie Meredith
2004-03-30 21:30 ` 2.6.4-mm2 Mary Edie Meredith
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