From: Rik van Riel <riel@redhat.com>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: RFC: cpu frequency scaling
Date: Wed, 25 Oct 2006 17:13:25 -0400 [thread overview]
Message-ID: <453FD375.6080901@redhat.com> (raw)
In-Reply-To: <C1658BDF.30C4%Keir.Fraser@cl.cam.ac.uk>
Keir Fraser wrote:
> Frequency changes in dom0, please. The 'small dom0' issue is easily handled
> -- create a driver domain to handle the frequency management. Or move the
> potentially resource-intensive processes in dom0 out to a domU
or have a cpufreq "driver domain"...
OK, I'll take a look at how we can do these things.
I'm guessing the way to start would be having either userspace
cpufreq code polling the hypervisor for CPU load, or have a
drivers/cpufreq/cpufreq_ondemand-xen.c that gets the CPU load
information from the hypervisor.
I'm guessing something like xentop already gets the right info
from the hypervisor in a relatively efficient way, or some of
the code in libvirt.
I'll dig around to see what code to hook into...
--
Who do you trust?
The people with all the right answers?
Or the people with the right questions?
next prev parent reply other threads:[~2006-10-25 21:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-25 18:04 RFC: cpu frequency scaling Rik van Riel
2006-10-25 20:47 ` Keir Fraser
2006-10-25 21:13 ` Rik van Riel [this message]
2006-10-26 12:35 ` Petersson, Mats
2006-10-26 14:09 ` Keir Fraser
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