On Wed, Nov 12, 2014 at 04:26:29PM +0100, Paolo Bonzini wrote: > > > On 12/11/2014 16:22, Gleb Natapov wrote: > >> > Nehalem results: > >> > > >> > 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? -- Gleb. -- 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
