On Mon, 2010-04-19 at 12:46 +0200, Peter Zijlstra wrote: > On Sat, 2010-04-17 at 21:48 +0300, Avi Kivity wrote: > > > After this patch is applied, I don't see a single warp in time during 5 > > > days > > > of execution, in any of the machines I saw them before. > > > > > > > > > > Please define a cpuid bit that makes this optional. When we eventually > > enable it in the future, it will allow a wider range of guests to enjoy it. > > Right, so on x86 we have: > > X86_FEATURE_CONSTANT_TSC, which only states that TSC is frequency > independent, not that it doesn't stop in C states and similar fun stuff. > > X86_FEATURE_TSC_RELIABLE, which IIRC should indicate the TSC is constant > and synced between cores.
Fun, we also have: X86_FEATURE_NONSTOP_TSC, which states the thing doesn't stop in C states. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
