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Date: Thu, 8 Apr 2010 10:34:07 -0500 (CDT) From: Christoph Lameter <cl@...ux-foundation.org> To: Eric Dumazet <eric.dumazet@...il.com> cc: "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>, Pekka Enberg <penberg@...helsinki.fi>, netdev <netdev@...r.kernel.org>, Tejun Heo <tj@...nel.org>, alex.shi@...el.com, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Ma, Ling" <ling.ma@...el.com>, "Chen, Tim C" <tim.c.chen@...el.com>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: hackbench regression due to commit 9dfc6e68bfe6e 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 > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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