On 08/12/2012 08:28 PM, Gleb Natapov wrote: > On Sun, Aug 12, 2012 at 04:40:48PM +0300, Avi Kivity wrote: >> On 08/12/2012 04:25 PM, Gleb Natapov wrote: >> >> >> How expensive is this? We may want a follow-on patch to cache it in a >> >> per-cpu variable. >> >> >> > I have patches ready. I couldn't measure any overhead of the >> > rdmsr(MSR_IA32_DEBUGCTLMSR). >> > >> >> Do you mean while running kvm? How about just running it in a loop? >> > No, I mean running it in a loop. Loop with or without > rdmsr(MSR_IA32_DEBUGCTLMSR) takes the same time as measured by rdtsc. Ok, good. -- error compiling committee.c: too many arguments to function -- 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
