>>> On 21.02.18 at 12:09, <jbeul...@suse.com> wrote: > Avoiding the PAUSE/LFENCE pair on the first of the two unrolled > iterations not only reduces code size, but also improves performance > according to my (limited) measurements (by 15-20 cycles on my Westmere; > granted I can't really explain why that is). Now that the two iterations > are sufficiently different, remove the use of .irp; otherwise .if would > need to be added to its body. > > Signed-off-by: Jan Beulich <jbeul...@suse.com> > --- > RFC because this presumably wants verification on other CPU models.
I'm withdrawing this patch - I've just checked and it makes things worse on Sandybridge. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
