Messages in this thread | | | Date | Mon, 31 Oct 2011 08:37:49 -0500 | From | Dimitri Sivanich <> | Subject | Re: [PATCH] cache align vm_stat |
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On Fri, Oct 28, 2011 at 03:54:56PM -0700, Andrew Morton wrote: > On Wed, 26 Oct 2011 21:31:46 -0500 (CDT) > Christoph Lameter <cl@gentwo.org> wrote: > > > On Mon, 24 Oct 2011, Dimitri Sivanich wrote: > > > > > Avoid false sharing of the vm_stat array. > > Did we have some nice machine-description and measurement results which > can be included in the changelog? Such things should always be > included with a performace patch! > Tests run on a 640 cpu UV system.
With 120 threads doing parallel writes, each to different tmpfs mounts: No patch: ~300 MB/sec With vm_stat alignment: ~430 MB/sec
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