On 09/24/2012 06:21 PM, Avi Kivity wrote: > On 09/24/2012 06:13 PM, Peter Zijlstra wrote: > > On Mon, 2012-09-24 at 18:10 +0200, Avi Kivity wrote: > >> > Its also still a LAPIC write -- disguised as an MSR though :/ > >> > >> It's probably a whole lot faster though. > > > > I've been told its not, I haven't tried it. > > I'll see if I can find a machine with it (don't see it on my Westmere, > it's probably on one of the Bridges. Or maybe the other Peter knows. > > Before measuring TSC_DEADLINE, I measured writing to TMICT, it costs 32 cycles. This is on a Sandy Bridge. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain. -- 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
