From: Rohit Seth <rohit.seth@intel.com>
To: Christoph Lameter <clameter@engr.sgi.com>
Cc: Andrew Morton <akpm@osdl.org>,
torvalds@osdl.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH]: Free pages from local pcp lists under tight memory conditions
Date: Wed, 23 Nov 2005 14:29:03 -0800 [thread overview]
Message-ID: <1132784943.25086.87.camel@akash.sc.intel.com> (raw)
In-Reply-To: <Pine.LNX.4.62.0511231325150.23433@schroedinger.engr.sgi.com>
On Wed, 2005-11-23 at 13:25 -0800, Christoph Lameter wrote:
> On Wed, 23 Nov 2005, Rohit Seth wrote:
>
> > I thought Nick et.al came up with some of the constant values like batch
> > size to tackle the page coloring issue specifically. In any case, I
> > think one of the key difference between 2.4 and 2.6 allocators is the
> > pcp list. And even with the minuscule batch and high watermarks this is
> > helping ordinary benchmarks (by reducing the variation from run to run).
>
> Could you share some benchmark results?
>
Some components of cpu2k on 2.4 base kernels show in access of 40-50%
variation from run to run. The same variations came down to about 10%
for 2.6 based kernels.
-rohit
WARNING: multiple messages have this Message-ID (diff)
From: Rohit Seth <rohit.seth@intel.com>
To: Christoph Lameter <clameter@engr.sgi.com>
Cc: Andrew Morton <akpm@osdl.org>,
torvalds@osdl.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH]: Free pages from local pcp lists under tight memory conditions
Date: Wed, 23 Nov 2005 14:29:03 -0800 [thread overview]
Message-ID: <1132784943.25086.87.camel@akash.sc.intel.com> (raw)
In-Reply-To: <Pine.LNX.4.62.0511231325150.23433@schroedinger.engr.sgi.com>
On Wed, 2005-11-23 at 13:25 -0800, Christoph Lameter wrote:
> On Wed, 23 Nov 2005, Rohit Seth wrote:
>
> > I thought Nick et.al came up with some of the constant values like batch
> > size to tackle the page coloring issue specifically. In any case, I
> > think one of the key difference between 2.4 and 2.6 allocators is the
> > pcp list. And even with the minuscule batch and high watermarks this is
> > helping ordinary benchmarks (by reducing the variation from run to run).
>
> Could you share some benchmark results?
>
Some components of cpu2k on 2.4 base kernels show in access of 40-50%
variation from run to run. The same variations came down to about 10%
for 2.6 based kernels.
-rohit
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next prev parent reply other threads:[~2005-11-23 22:22 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-23 0:10 [PATCH]: Free pages from local pcp lists under tight memory conditions Rohit Seth
2005-11-23 0:10 ` Rohit Seth
2005-11-23 5:36 ` Andrew Morton
2005-11-23 5:36 ` Andrew Morton
2005-11-23 5:58 ` Andrew Morton
2005-11-23 5:58 ` Andrew Morton
2005-11-23 18:17 ` Rohit Seth
2005-11-23 18:17 ` Rohit Seth
2005-11-23 6:36 ` Christoph Lameter
2005-11-23 6:36 ` Christoph Lameter
2005-11-23 6:42 ` Christoph Lameter
2005-11-23 6:42 ` Christoph Lameter
2005-11-23 16:35 ` Linus Torvalds
2005-11-23 16:35 ` Linus Torvalds
2005-11-23 17:03 ` Christoph Lameter
2005-11-23 17:03 ` Christoph Lameter
2005-11-23 17:54 ` Rohit Seth
2005-11-23 17:54 ` Rohit Seth
2005-11-23 18:06 ` Mel Gorman
2005-11-23 18:06 ` Mel Gorman
2005-11-23 19:41 ` Rohit Seth
2005-11-23 19:41 ` Rohit Seth
2005-11-24 9:25 ` Mel Gorman
2005-11-24 9:25 ` Mel Gorman
2005-11-23 23:26 ` Rohit Seth
2005-11-23 23:26 ` Rohit Seth
2005-11-23 19:30 ` Christoph Lameter
2005-11-23 19:30 ` Christoph Lameter
2005-11-23 19:46 ` Rohit Seth
2005-11-23 19:46 ` Rohit Seth
2005-11-23 19:55 ` Andrew Morton
2005-11-23 19:55 ` Andrew Morton
2005-11-23 21:00 ` Rohit Seth
2005-11-23 21:00 ` Rohit Seth
2005-11-23 21:25 ` Christoph Lameter
2005-11-23 21:25 ` Christoph Lameter
2005-11-23 22:29 ` Rohit Seth [this message]
2005-11-23 22:29 ` Rohit Seth
2005-11-23 21:26 ` Andrew Morton
2005-11-23 21:26 ` Andrew Morton
2005-11-23 21:40 ` Rohit Seth
2005-11-23 21:40 ` Rohit Seth
2005-11-24 3:02 ` Paul Jackson
2005-11-24 3:02 ` Paul Jackson
2005-11-29 23:18 ` Rohit Seth
2005-11-29 23:18 ` Rohit Seth
2005-12-01 14:44 ` Paul Jackson
2005-12-01 14:44 ` Paul Jackson
2005-12-02 0:32 ` Nick Piggin
2005-12-02 0:32 ` Nick Piggin
2005-11-23 22:01 ` Christoph Lameter
2005-11-23 22:01 ` Christoph Lameter
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