From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
Andrew Morton <akpm@linux-foundation.org>,
"lizf@cn.fujitsu.com" <lizf@cn.fujitsu.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
"menage@google.com" <menage@google.com>,
xemul@openvz.org, prarit@redhat.com, andi.kleen@intel.com,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [UPDATED][PATCH][mmotm] Help Root Memory Cgroup Resource Counters Scale Better (v5)
Date: Fri, 14 Aug 2009 07:31:23 +0530 [thread overview]
Message-ID: <20090814020122.GL5087@balbir.in.ibm.com> (raw)
In-Reply-To: <20090813083524.GC21389@elte.hu>
* Ingo Molnar <mingo@elte.hu> [2009-08-13 10:35:24]:
>
> * Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
>
> > Without Patch
> >
> > Performance counter stats for '/home/balbir/parallel_pagefault':
> >
> > 5826093739340 cycles # 809.989 M/sec
> > 408883496292 instructions # 0.070 IPC
> > 7057079452 cache-references # 0.981 M/sec
> > 3036086243 cache-misses # 0.422 M/sec
>
> > With this patch applied
> >
> > Performance counter stats for '/home/balbir/parallel_pagefault':
> >
> > 5957054385619 cycles # 828.333 M/sec
> > 1058117350365 instructions # 0.178 IPC
> > 9161776218 cache-references # 1.274 M/sec
> > 1920494280 cache-misses # 0.267 M/sec
>
> Nice how the instruction count and the IPC value incraesed, and the
> cache-miss count decreased.
>
> Btw., a 'perf stat' suggestion: you can also make use of built-in
> error bars via repeating parallel_pagefault N times:
>
> aldebaran:~> perf stat --repeat 3 /bin/ls
Ingo, with the repeat experiements I see
7192354.545647 task-clock-msecs # 23.955 CPUs ( +- 0.002% )
425627 context-switches # 0.000 M/sec ( +- 0.333% )
155 CPU-migrations # 0.000 M/sec ( +- 10.897% )
95336481 page-faults # 0.013 M/sec ( +- 0.085% )
5951929070187 cycles # 827.536 M/sec ( +- 0.009% )
1058312583796 instructions # 0.178 IPC ( +- 0.076% )
9616609083 cache-references # 1.337 M/sec ( +- 2.536% )
1952367514 cache-misses # 0.271 M/sec ( +- 0.156% )
300.246532761 seconds time elapsed ( +- 0.002% )
Except for the CPU migrations and the cache references, all the other
parameters seem to be well within an acceptable error range.
--
Balbir
WARNING: multiple messages have this Message-ID (diff)
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
Andrew Morton <akpm@linux-foundation.org>,
"lizf@cn.fujitsu.com" <lizf@cn.fujitsu.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
"menage@google.com" <menage@google.com>,
xemul@openvz.org, prarit@redhat.com, andi.kleen@intel.com,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [UPDATED][PATCH][mmotm] Help Root Memory Cgroup Resource Counters Scale Better (v5)
Date: Fri, 14 Aug 2009 07:31:23 +0530 [thread overview]
Message-ID: <20090814020122.GL5087@balbir.in.ibm.com> (raw)
In-Reply-To: <20090813083524.GC21389@elte.hu>
* Ingo Molnar <mingo@elte.hu> [2009-08-13 10:35:24]:
>
> * Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
>
> > Without Patch
> >
> > Performance counter stats for '/home/balbir/parallel_pagefault':
> >
> > 5826093739340 cycles # 809.989 M/sec
> > 408883496292 instructions # 0.070 IPC
> > 7057079452 cache-references # 0.981 M/sec
> > 3036086243 cache-misses # 0.422 M/sec
>
> > With this patch applied
> >
> > Performance counter stats for '/home/balbir/parallel_pagefault':
> >
> > 5957054385619 cycles # 828.333 M/sec
> > 1058117350365 instructions # 0.178 IPC
> > 9161776218 cache-references # 1.274 M/sec
> > 1920494280 cache-misses # 0.267 M/sec
>
> Nice how the instruction count and the IPC value incraesed, and the
> cache-miss count decreased.
>
> Btw., a 'perf stat' suggestion: you can also make use of built-in
> error bars via repeating parallel_pagefault N times:
>
> aldebaran:~> perf stat --repeat 3 /bin/ls
Ingo, with the repeat experiements I see
7192354.545647 task-clock-msecs # 23.955 CPUs ( +- 0.002% )
425627 context-switches # 0.000 M/sec ( +- 0.333% )
155 CPU-migrations # 0.000 M/sec ( +- 10.897% )
95336481 page-faults # 0.013 M/sec ( +- 0.085% )
5951929070187 cycles # 827.536 M/sec ( +- 0.009% )
1058312583796 instructions # 0.178 IPC ( +- 0.076% )
9616609083 cache-references # 1.337 M/sec ( +- 2.536% )
1952367514 cache-misses # 0.271 M/sec ( +- 0.156% )
300.246532761 seconds time elapsed ( +- 0.002% )
Except for the CPU migrations and the cache references, all the other
parameters seem to be well within an acceptable error range.
--
Balbir
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next prev parent reply other threads:[~2009-08-14 2:01 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-13 6:55 [PATCH][mmotm] Help Root Memory Cgroup Resource Counters Scale Better (v5) Balbir Singh
2009-08-13 6:55 ` Balbir Singh
2009-08-13 7:26 ` Daisuke Nishimura
2009-08-13 7:26 ` Daisuke Nishimura
2009-08-13 8:02 ` [UPDATED][PATCH][mmotm] " Balbir Singh
2009-08-13 8:02 ` Balbir Singh
2009-08-13 8:35 ` Ingo Molnar
2009-08-13 8:35 ` Ingo Molnar
2009-08-13 8:43 ` Balbir Singh
2009-08-13 8:43 ` Balbir Singh
2009-08-14 2:01 ` Balbir Singh [this message]
2009-08-14 2:01 ` Balbir Singh
2009-08-15 14:26 ` Ingo Molnar
2009-08-15 14:26 ` Ingo Molnar
2009-08-13 11:12 ` Daisuke Nishimura
2009-08-13 11:12 ` Daisuke Nishimura
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