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From: Christoph Lameter <cl@linux-foundation.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
	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, 8 Apr 2010 10:34:07 -0500 (CDT)	[thread overview]
Message-ID: <alpine.DEB.2.00.1004081033420.6321@router.home> (raw)
In-Reply-To: <1270705153.8141.58.camel@edumazet-laptop>

On Thu, 8 Apr 2010, Eric Dumazet wrote:

> I suspect NUMA is completely out of order on current kernel, or my
> Nehalem machine NUMA support is a joke
>
> # numactl --hardware
> available: 2 nodes (0-1)
> node 0 size: 3071 MB
> node 0 free: 2637 MB
> node 1 size: 3062 MB
> node 1 free: 2909 MB

How do the cpus map to the nodes? cpu 0 and 1 both on the same node?

> # ./try.sh
> Running with 50*40 (== 2000) tasks.
> Time: 16.865
> node0 results
> Running with 25*40 (== 1000) tasks.
> Time: 16.767
> node1 results
> Running with 25*40 (== 1000) tasks.
> Time: 16.564
> node0 on mem1 results
> Running with 25*40 (== 1000) tasks.
> Time: 16.814
> node1 on mem0 results
> Running with 25*40 (== 1000) tasks.
> Time: 16.896
>
>
>

  parent reply	other threads:[~2010-04-08 15:37 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-03-25  8:40 hackbench regression due to commit 9dfc6e68bfe6e Alex Shi
2010-03-25 14:49 ` Christoph Lameter
2010-03-26  2:35   ` Alex Shi
2010-04-01  9:29     ` Zhang, Yanmin
2010-04-01 15:53       ` Christoph Lameter
2010-04-02  8:06         ` Zhang, Yanmin
2010-04-05 13:54           ` Christoph Lameter
2010-04-05 17:30             ` Pekka Enberg
2010-04-06  1:27               ` Tejun Heo
2010-04-06  8:28                 ` Zhang, Yanmin
2010-04-06 15:41                   ` Christoph Lameter
2010-04-06 20:55                     ` Christoph Lameter
2010-04-06 22:10                       ` 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 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
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 [this message]
2010-04-08 15:52                                             ` Eric Dumazet
2010-04-07 18:18                               ` Christoph Lameter
2010-04-08  7:18                             ` Zhang, Yanmin
2010-04-07  2:20                       ` Zhang, Yanmin
2010-04-07  0:58                     ` Zhang, Yanmin

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