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Date: Tue, 11 Aug 2009 20:30:57 +0530
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Prarit Bhargava <prarit@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
       "nishimura@mxp.nes.nec.co.jp" <nishimura@mxp.nes.nec.co.jp>,
       KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       "menage@google.com" <menage@google.com>, andi.kleen@intel.com,
       Pavel Emelianov <xemul@openvz.org>,
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       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       "linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: Help Resource Counters Scale better (v4)
Message-ID: <20090811150057.GY7176@balbir.in.ibm.com>
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References: <20090811144405.GW7176@balbir.in.ibm.com> <4A81863A.2050504@redhat.com>
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* Prarit Bhargava <prarit@redhat.com> [2009-08-11 10:54:50]:

>
>
> Balbir Singh wrote:
>> Enhancement: Remove the overhead of root based resource counter accounting
>>
>>
>>   
>
> <snip>
>> Please test/review.
>>
>>   
> FWIW ...
>

Thanks for the testing!

> On a 64p/32G system running 2.6.31-git2-rc5, with RESOURCE_COUNTERS off,  
> "time make -j64" results in
>
> real    4m54.972s
> user    90m13.456s
> sys     50m19.711s
>
> On the same system, running 2.6.31-git2-rc5, with RESOURCE_COUNTERS on,
> plus Balbir's "Help Resource Counters Scale Better (v3)" patch, and this  
                                                     ^^^
                                        you mean (v4) right?
> patch, results in
>
> real    4m18.607s
> user    84m58.943s
> sys     50m52.682s
>

Without the patch and RESOURCE_COUNTERS do you see a big overhead. I'd
assume so, I am seeing it on my 24 way box that I have access to.

-- 
	Balbir