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@xxxxxxxxxx> 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>