From: Nick Piggin <piggin@cyberone.com.au>
To: Peter Wong <wpeter@us.ibm.com>
Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@digeo.com>,
Mike Sullivan <mksully@us.ibm.com>,
Bill Hartner <bhartner@us.ibm.com>,
Ray Venditti <venditti@us.ibm.com>
Subject: Re: Evaluation of three I/O schedulers
Date: Tue, 01 Jul 2003 16:12:51 +1000 [thread overview]
Message-ID: <3F012663.5040704@cyberone.com.au> (raw)
In-Reply-To: <OF9393D547.0D1D003C-ON85256D55.004DFAA4@pok.ibm.com>
Peter Wong wrote:
>We used 2.5.72+mm1 to evaluate three I/O schedulers, namely
>anticipatory, deadline and complete fair queueing under a very heavy
>database workload on an 8-way Pentium 4 machine. The workload is a
>decision support system doing mostly sequential I/O and each run takes
>about one hour. All three runs finished completely without encountering
>functional problems, and achieved similar performance level.
>
>The 8-way machine has Pentium 4 2.0 GHz processors, 16 GB physical
>memory, 2MB L3 cache, 8 FC controllers with 80 disks. Hyperthreading
>was turned on for the three runs. The CPU utilization is similar for all
>three runs: 65% user, 7% system and 28% idle.
>
Hi Peter,
How many block devices are being used at once in your tests?
I would be interested to see profiles of AS and DL if possible.
Thanks.
Nick
prev parent reply other threads:[~2003-07-01 5:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-30 14:21 Evaluation of three I/O schedulers Peter Wong
2003-06-30 15:15 ` Dave Hansen
2003-07-01 6:12 ` Nick Piggin [this message]
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