From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Robert Bradbury <robert.bradbury@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Broken ondemand scheduler in Linux 2.6.30+ on Pentium IVs
Date: Mon, 26 Oct 2009 18:19:34 +0000 [thread overview]
Message-ID: <20091026181934.GA4657@srcf.ucam.org> (raw)
In-Reply-To: <deaa866a0910251546m7ea001bcm252c41e65927a424@mail.gmail.com>
The ondemand governor assumes that frequency transitions occur at low
latency. This isn't usefully the case with p4-clockmod, and running
ondemand there will generally show obvious performance regressions. If
you have a recent enough P4 use the acpi-cpufreq driver instead. If not,
the conservative governor should still work and is a better fit to the
hardware.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2009-10-26 18:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-25 22:46 Broken ondemand scheduler in Linux 2.6.30+ on Pentium IVs Robert Bradbury
[not found] ` <20091026015755.7482.qmail@stuge.se>
2009-10-26 11:50 ` Robert Bradbury
2009-10-26 18:19 ` Matthew Garrett [this message]
2009-10-26 18:23 ` Matthew Garrett
2009-10-27 0:44 ` Robert Hancock
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