On Fri, 2015-05-22 at 13:14 -0400, Waiman Long wrote: > I think the non-temporal patch benefits mainly AMD systems. I have tried > the patch on both DragonHawk and it actually made it boot up a little > bit slower. I think the Intel optimized "rep stosb" instruction (used in > memset) is performing well. I had done similar test on zero page code > and the performance gain was non-conclusive. fwiw I did some experiments with similar conclusions a while ago (inconclusive with intel hw, maybe it was even the same machine ;) Now, this was for optimizing clear_hugepage by using movnti, but I never got to run it on an AMD box. Thanks, Davidlohr -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>