linux-kernel - Re: [PATCH 2/2] memcg : rewrite percpu countings with new interfaces

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Date:	Mon, 9 Nov 2009 17:36:10 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	cl@...ux-foundation.org,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/2] memcg : rewrite percpu countings with new
 interfaces

On Mon, 9 Nov 2009 12:37:37 +0530
Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
 
> > after==
> >  Performance counter stats for './runpause.sh' (5 runs):
> > 
> >   474919.429670  task-clock-msecs         #      7.896 CPUs    ( +-   0.013% )
> >        36520440  page-faults              #      0.077 M/sec   ( +-   1.854% )
> >      3109834751  cache-references         #      6.548 M/sec   ( +-   0.276% )
> >      1053275160  cache-misses             #      2.218 M/sec   ( +-   0.036% )
> > 
> >    60.146585280  seconds time elapsed   ( +-   0.019% )
> > 
> > This test is affected by cpu-utilization but I think more improvements
> > will be found in bigger system.
> >
> 
> Hi, Kamezawa-San,
> 
> Could you please post the IPC results as well? 
> 
Because PREEMPT=n, no differnce between v1/v2, basically.

Here.
==
 Performance counter stats for './runpause.sh' (5 runs):

  475884.969949  task-clock-msecs         #      7.913 CPUs    ( +-   0.005% )
       36592060  page-faults              #      0.077 M/sec   ( +-   0.301% )
     3037784893  cache-references         #      6.383 M/sec   ( +-   0.361% )  (scaled from 99.71%)
     1130761297  cache-misses             #      2.376 M/sec   ( +-   0.244% )  (scaled from 98.24%)

   60.136803969  seconds time elapsed   ( +-   0.006% )
==

But this program is highly affected by cpu utilization etc...

Thanks,
-Kame



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