From: "Peter Wong" <wpeter@us.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@digeo.com>,
"Mike Sullivan" <mksully@us.ibm.com>,
"Bill Hartner" <bhartner@us.ibm.com>,
"Ray Venditti" <venditti@us.ibm.com>
Subject: Evaluation of three I/O schedulers
Date: Mon, 30 Jun 2003 09:21:24 -0500 [thread overview]
Message-ID: <OF9393D547.0D1D003C-ON85256D55.004DFAA4@pok.ibm.com> (raw)
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.
Regards,
Peter
Peter Wai Yee Wong
IBM Linux Technology Center Performance Team
email: wpeter@us.ibm.com
next reply other threads:[~2003-06-30 14:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-30 14:21 Peter Wong [this message]
2003-06-30 15:15 ` Evaluation of three I/O schedulers Dave Hansen
2003-07-01 6:12 ` Nick Piggin
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