From: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Christoph Lameter <cl@linux-foundation.org>,
Pekka Enberg <penberg@cs.helsinki.fi>,
netdev <netdev@vger.kernel.org>, Tejun Heo <tj@kernel.org>,
alex.shi@intel.com,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Ma, Ling" <ling.ma@intel.com>,
"Chen, Tim C" <tim.c.chen@intel.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: hackbench regression due to commit 9dfc6e68bfe6e
Date: Thu, 08 Apr 2010 09:05:47 +0800 [thread overview]
Message-ID: <1270688747.2078.383.camel@ymzhang.sh.intel.com> (raw)
In-Reply-To: <1270665484.8141.47.camel@edumazet-laptop>
On Wed, 2010-04-07 at 20:38 +0200, Eric Dumazet wrote:
> Le mercredi 07 avril 2010 à 13:20 -0500, Christoph Lameter a écrit :
> > On Wed, 7 Apr 2010, Pekka Enberg wrote:
> >
> > > Oh, sorry, I think it's actually '____cacheline_aligned_in_smp' (with four
> > > underscores) for per-cpu data. Confusing...
> >
> > This does not particulary help to clarify the situation since we are
> > dealing with data that can either be allocated via the percpu allocator or
> > be statically present (kmalloc bootstrap situation).
> >
> > --
>
> Do we have a user program to check actual L1 cache size of a machine ?
If there is no, it's easy to write it as kernel exports the cache stat by
/sys/devices/system/cpu/cpuXXX/cache/indexXXX/
>
> I remember my HP blades have many BIOS options, I would like to make
> sure they are properly set.
>
>
>
next prev parent reply other threads:[~2010-04-08 1:03 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1269506457.4513.141.camel@alexs-hp.sh.intel.com>
[not found] ` <alpine.DEB.2.00.1003250942080.2670@router.home>
[not found] ` <1269570902.9614.92.camel@alexs-hp.sh.intel.com>
[not found] ` <1270114166.2078.107.camel@ymzhang.sh.intel.com>
[not found] ` <alpine.DEB.2.00.1004011050340.16531@router.home>
[not found] ` <1270195589.2078.116.camel@ymzhang.sh.intel.com>
[not found] ` <alpine.DEB.2.00.1004050853300.23149@router.home>
[not found] ` <i2z84144f021004051030k7ff5190cyc083aa12c552dfac@mail.gmail.com>
[not found] ` <4BBA8DF9.8010409@kernel.org>
[not found] ` <1270542497.2078.123.camel@ymzhang.sh.intel.com>
[not found] ` <alpine.DEB.2.00.1004061033330.18750@router.home>
[not found] ` <alpine.DEB.2.00.1004061552500.19151@router.home>
2010-04-06 22:10 ` hackbench regression due to commit 9dfc6e68bfe6e Eric Dumazet
2010-04-07 2:34 ` Zhang, Yanmin
2010-04-07 6:39 ` Eric Dumazet
2010-04-07 9:07 ` Zhang, Yanmin
2010-04-07 9:20 ` Eric Dumazet
2010-04-07 10:47 ` Pekka Enberg
2010-04-07 16:30 ` Christoph Lameter
2010-04-07 16:43 ` Christoph Lameter
2010-04-07 16:49 ` Pekka Enberg
2010-04-07 16:52 ` Pekka Enberg
2010-04-07 18:20 ` Christoph Lameter
2010-04-07 18:25 ` Pekka Enberg
2010-04-07 19:30 ` Christoph Lameter
2010-04-07 18:38 ` Eric Dumazet
2010-04-08 1:05 ` Zhang, Yanmin [this message]
2010-04-08 4:59 ` Eric Dumazet
2010-04-08 5:39 ` Eric Dumazet
2010-04-08 7:00 ` Eric Dumazet
2010-04-08 7:05 ` David Miller
2010-04-08 7:20 ` David Miller
2010-04-08 7:25 ` Eric Dumazet
2010-04-08 7:54 ` Zhang, Yanmin
2010-04-08 7:54 ` Eric Dumazet
2010-04-08 8:09 ` Eric Dumazet
2010-04-08 15:34 ` Christoph Lameter
2010-04-08 15:52 ` Eric Dumazet
2010-04-07 18:18 ` Christoph Lameter
2010-04-08 7:18 ` Zhang, Yanmin
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