linux-kernel - Re: [PATCH v5 7/9] KVM-GST: KVM Steal time accounting

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Message-ID: <4E148F62.2040003@redhat.com>
Date:	Wed, 06 Jul 2011 12:37:54 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Glauber Costa <glommer@...hat.com>
CC:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Avi Kivity <avi@...hat.com>,
	Anthony Liguori <aliguori@...ibm.com>,
	Eric B Munson <emunson@...bm.net>
Subject: Re: [PATCH v5 7/9] KVM-GST: KVM Steal time accounting

On 07/04/2011 11:32 AM, Glauber Costa wrote:
> This patch accounts steal time time in account_process_tick.
> If one or more tick is considered stolen in the current
> accounting cycle, user/system accounting is skipped. Idle is fine,
> since the hypervisor does not report steal time if the guest
> is halted.
>
> Accounting steal time from the core scheduler give us the
> advantage of direct acess to the runqueue data. In a later
> opportunity, it can be used to tweak cpu power and make
> the scheduler aware of the time it lost.
>
> Signed-off-by: Glauber Costa<glommer@...hat.com>
> CC: Rik van Riel<riel@...hat.com>
> CC: Jeremy Fitzhardinge<jeremy.fitzhardinge@...rix.com>
> CC: Peter Zijlstra<peterz@...radead.org>
> CC: Avi Kivity<avi@...hat.com>
> CC: Anthony Liguori<aliguori@...ibm.com>
> CC: Eric B Munson<emunson@...bm.net>

Acked-by: Rik van Riel <riel@...hat.com>

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