From: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
To: <ak@suse.de>
Cc: <linux-kernel@vger.kernel.org>
Subject: RE: Update: Industry db benchmark result
Date: Wed, 22 Jun 2005 17:09:17 -0700 [thread overview]
Message-ID: <200506230009.j5N09Hg11772@unix-os.sc.intel.com> (raw)
In-Reply-To: <p738y12arff.fsf@verdi.suse.de>
Andi Kleen wrote on Wednesday, June 22, 2005 4:44 PM
> "Chen, Kenneth W" <kenneth.w.chen@intel.com> writes:
> >
> > It's been hovering around -13%.
>
> Do you have an educated guess where the 13% loss is comming from?
Process scheduler is the prime suspect. Earlier scheduler experiments
on top of 2.6.11 showed that it was about 10% regression. Similar
experiments repeated on top of 2.6.12-rc4 indicated about a much
smaller 4%. Other area are O_DIRECT (2%), and possibly scsi.
- Ken
next prev parent reply other threads:[~2005-06-23 0:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200506222115.j5MLFtg10364@unix-os.sc.intel.com.suse.lists.linux.kernel>
2005-06-22 23:43 ` Andi Kleen
2005-06-23 0:09 ` Chen, Kenneth W [this message]
2005-06-22 21:15 Chen, Kenneth W
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