On 12/11/2014 16:32, Gleb Natapov wrote: > > > > userspace exit, urn 17560 17726 17628 17572 17417 > > > > lightweight exit, urn 3316 3342 3342 3319 3328 > > > > userspace exit, LOAD_EFER, guest!=host 12200 11772 12130 12164 12327 > > > > lightweight exit, LOAD_EFER, guest!=host 3214 3220 3238 3218 3337 > > > > userspace exit, LOAD_EFER, guest=host 11983 11780 11920 11919 12040 > > > > lightweight exit, LOAD_EFER, guest=host 3178 3193 3193 3187 3220 > > > > > > Is this with Andy's patch that skips LOAD_EFER when guest=host, or the one > > > that always switch LOAD_EFER? > > > > Skip LOAD_EFER when guest=host. > > So guest=host is a little bit better than guest!=host so looks like > skipping LOAD_EFER helps, but why "lightweight exit, urn" worse than > guest=host though, it should be exactly the same as long as NX bit is > the same in urn test, no? I don't know---it is very much reproducible though. It is not my machine so I cannot run perf on it, but I can try to find a similar one in the next few days. Paolo -- 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
