From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Subject: Re: hackbench regression due to commit 9dfc6e68bfe6e
Date: Thu, 08 Apr 2010 09:05:47 +0800
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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>
To: Eric Dumazet <eric.dumazet@gmail.com>
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On Wed, 2010-04-07 at 20:38 +0200, Eric Dumazet wrote:
> Le mercredi 07 avril 2010 =E0 13:20 -0500, Christoph Lameter a =E9cri=
t :
> > On Wed, 7 Apr 2010, Pekka Enberg wrote:
> >=20
> > > Oh, sorry, I think it's actually '____cacheline_aligned_in_smp' (=
with four
> > > underscores) for per-cpu data. Confusing...
> >=20
> > This does not particulary help to clarify the situation since we ar=
e
> > dealing with data that can either be allocated via the percpu alloc=
ator or
> > be statically present (kmalloc bootstrap situation).
> >=20
> > --
>=20
> 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/

>=20
> I remember my HP blades have many BIOS options, I would like to make
> sure they are properly set.
>=20
>=20
>=20