linux-kernel - Re: [patch 00/15] CFS Bandwidth Control V6

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Date:	Tue, 14 Jun 2011 16:29:49 +0900
From:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
To:	Hu Tao <hutao@...fujitsu.com>
CC:	Paul Turner <pjt@...gle.com>, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Bharata B Rao <bharata@...ux.vnet.ibm.com>,
	Dhaval Giani <dhaval.giani@...il.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.co>
Subject: Re: [patch 00/15] CFS Bandwidth Control V6

(2011/06/14 15:58), Hu Tao wrote:
> Hi,
> 
> I've run several tests including hackbench, unixbench, massive-intr
> and kernel building. CPU is Intel(R) Xeon(R) CPU X3430  @ 2.40GHz,
> 4 cores, and 4G memory.
> 
> Most of the time the results differ few, but there are problems:
> 
> 1. unixbench: execl throughout has about 5% drop.
> 2. unixbench: process creation has about 5% drop.
> 3. massive-intr: when running 200 processes for 5mins, the number
>    of loops each process runs differ more than before cfs-bandwidth-v6.
> 
> The results are attached.

I know the score of unixbench is not so stable that the problem might
be noises ... but the result of massive-intr is interesting.
Could you give a try to find which piece (xx/15) in the series cause
the problems?

Thanks,
H.Seto

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