Messages in this thread | | | Date | Thu, 8 Apr 2010 10:34:07 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: hackbench regression due to commit 9dfc6e68bfe6e |
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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 > > >
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