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Subject: Re: [PATCH 16/16] KVM-GST: adjust scheduler cpu power
From: Peter Zijlstra <peterz@infradead.org>
To: Glauber Costa <glommer@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, aliguori@us.ibm.com,
        Rik van Riel <riel@redhat.com>,
        Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>,
        Avi Kivity <avi@redhat.com>
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Date: Mon, 24 Jan 2011 20:53:10 +0100
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On Mon, 2011-01-24 at 16:51 -0200, Glauber Costa wrote:
> 
> > I thought kvm had a ns resolution steal-time clock?
> Yes, the one I introduced earlier in this series is nsec. However, user
> and system will be accounted in usec at most, so there is no point in
> using nsec here.

Well, the scheduler accounts most things in ns these days -- some archs
even do user/sys time in ns -- using ticks is really very crude, esp
when you've got better information.