From: Rohit Seth <rohit.seth@intel.com>
To: Christoph Lameter <clameter@engr.sgi.com>
Cc: akpm@osdl.org, linux-mm@kvack.org,
Mattia Dongili <malattia@linux.it>,
linux-kernel@vger.kernel.org, steiner@sgi.com,
nickpiggin@yahoo.com.au
Subject: Re: [patch] Reset the high water marks in CPUs pcp list
Date: Wed, 28 Sep 2005 18:12:56 -0700 [thread overview]
Message-ID: <1127956376.5046.44.camel@akash.sc.intel.com> (raw)
In-Reply-To: <Pine.LNX.4.62.0509281455310.15902@schroedinger.engr.sgi.com>
On Wed, 2005-09-28 at 14:56 -0700, Christoph Lameter wrote:
> On Wed, 28 Sep 2005, Rohit Seth wrote:
>
> > On Wed, 2005-09-28 at 14:09 -0700, Christoph Lameter wrote:
> > > On Wed, 28 Sep 2005, Rohit Seth wrote:
> > >
> > > > CONFIG_NUMA needs to be defined for that. And then too for flushing the
> > > > remote pages. Also, when are you flushing the local pcps. Also note
> > > > that this patch is just bringing the free pages on the pcp list closer
> > > > to what used to be the number earlier.
> > >
> > > What was the reason for the increase of those numbers?
> > Bugger batch size to possibly get more physical contiguous pages. That
> > indirectly increased the high water marks for the pcps.
>
> I know that Jack and Nick did something with those counts to insure that
> page coloring effects are avoided. Would you comment?
>
About 10% performance variation was seen from run to run with original
setting with certain workloads on x86 and IA-64 platforms. And this
variation came down to about 2% with new settings.
-rohit
WARNING: multiple messages have this Message-ID (diff)
From: Rohit Seth <rohit.seth@intel.com>
To: Christoph Lameter <clameter@engr.sgi.com>
Cc: akpm@osdl.org, linux-mm@kvack.org,
Mattia Dongili <malattia@linux.it>,
linux-kernel@vger.kernel.org, steiner@sgi.com,
nickpiggin@yahoo.com.au
Subject: Re: [patch] Reset the high water marks in CPUs pcp list
Date: Wed, 28 Sep 2005 18:12:56 -0700 [thread overview]
Message-ID: <1127956376.5046.44.camel@akash.sc.intel.com> (raw)
In-Reply-To: <Pine.LNX.4.62.0509281455310.15902@schroedinger.engr.sgi.com>
On Wed, 2005-09-28 at 14:56 -0700, Christoph Lameter wrote:
> On Wed, 28 Sep 2005, Rohit Seth wrote:
>
> > On Wed, 2005-09-28 at 14:09 -0700, Christoph Lameter wrote:
> > > On Wed, 28 Sep 2005, Rohit Seth wrote:
> > >
> > > > CONFIG_NUMA needs to be defined for that. And then too for flushing the
> > > > remote pages. Also, when are you flushing the local pcps. Also note
> > > > that this patch is just bringing the free pages on the pcp list closer
> > > > to what used to be the number earlier.
> > >
> > > What was the reason for the increase of those numbers?
> > Bugger batch size to possibly get more physical contiguous pages. That
> > indirectly increased the high water marks for the pcps.
>
> I know that Jack and Nick did something with those counts to insure that
> page coloring effects are avoided. Would you comment?
>
About 10% performance variation was seen from run to run with original
setting with certain workloads on x86 and IA-64 platforms. And this
variation came down to about 2% with new settings.
-rohit
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next prev parent reply other threads:[~2005-09-29 1:05 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-28 17:50 [patch] Reset the high water marks in CPUs pcp list Seth, Rohit
2005-09-28 17:50 ` Seth, Rohit
2005-09-28 20:01 ` Christoph Lameter
2005-09-28 20:01 ` Christoph Lameter
2005-09-28 20:26 ` Rohit Seth
2005-09-28 20:26 ` Rohit Seth
2005-09-28 21:09 ` Christoph Lameter
2005-09-28 21:09 ` Christoph Lameter
2005-09-28 21:32 ` Rohit Seth
2005-09-28 21:32 ` Rohit Seth
2005-09-28 21:56 ` Christoph Lameter
2005-09-28 21:56 ` Christoph Lameter
2005-09-29 1:12 ` Rohit Seth [this message]
2005-09-29 1:12 ` Rohit Seth
2005-09-29 6:49 ` Nick Piggin
2005-09-29 6:49 ` Nick Piggin
2005-09-29 16:34 ` Rohit Seth
2005-09-29 16:34 ` Rohit Seth
2005-09-28 21:18 ` Martin J. Bligh
2005-09-28 21:18 ` Martin J. Bligh
2005-09-28 21:55 ` Christoph Lameter
2005-09-28 21:55 ` Christoph Lameter
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