linux-kernel - Re: [RFC v2 PATCH 0/8] CFS Hard limits

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Message-ID: <20091001051230.GA3451@in.ibm.com>
Date:	Thu, 1 Oct 2009 10:42:30 +0530
From:	Bharata B Rao <bharata@...ux.vnet.ibm.com>
To:	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Pavel Emelyanov <xemul@...nvz.org>,
	linux-kernel@...r.kernel.org,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Gautham R Shenoy <ego@...ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Avi Kivity <avi@...hat.com>,
	Chris Friesen <cfriesen@...tel.com>,
	Paul Menage <menage@...gle.com>,
	Mike Waychison <mikew@...gle.com>
Subject: Re: [RFC v2 PATCH 0/8] CFS Hard limits - v2

On Thu, Oct 01, 2009 at 12:30:39AM +0200, Herbert Poetzl wrote:
> 
> Linux-VServer uses interval and rate, which is very similar
> to your setup, except that we use two pairs to achive
> a differentiation for 'busy' and 'idle' cases, i.e. when
> the cpu(s) would go idle, we switch from R1/I1 to R2/I2
> for all guests, allowing to distribute the excess differently
> than the 'active' part ... but only one set is needed for
> hard limits ...

Do you have examples of how you choose R1, I1 and R2, I2 for guests
running typical workloads ?

Regards,
Bharata.
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