> > On Wed, 2008-09-24 at 11:24 +0200, Christian Ehrhardt wrote: > > count min max > > sum avg stddev time% > > EMULINST 6,423,699 12 247,582 > 91,732,705 > > 14.2804 241.200 45.36 > > ITLBVIRT 1,777,242 21 264,257 > 47,116,557 > > 26.5111 286.040 23.30 > > DTLBVIRT 1,544,241 22 263,947 > 41,765,447 > > 27.0459 218.997 20.65 > > (The max here is of course when the guest was de-scheduled in favor of > another host process.) > > I think it's interesting that the min instruction emulation time is 12 > usecs. In fact, our "null" exits where we do almost no > processing (ISI, > DSI, syscall) are 11 usecs, which suggests we have a problem with > interrupt handler overhead (for all exit types). > Will you consider about moving tlb manipulation out of entering path? Examining the modify array may cost some time. -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
