* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote: > On 10/06/2011 10:40 AM, Jeremy Fitzhardinge wrote: > > However, it looks like locked xadd is also has better performance: on > > my Sandybridge laptop (2 cores, 4 threads), the add+mfence is 20% slower > > than locked xadd, so that pretty much settles it unless you think > > there'd be a dramatic difference on an AMD system. > > Konrad measures add+mfence is about 65% slower on AMD Phenom as well. xadd also results in smaller/tighter code, right? Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
