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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
