I just wrote a little perf self-monitoring tool that uses rdpmc to count cycles. Performance sucks under KVM (VMX). How hard would it be to avoid rdpmc exits in cases where the host and guest pmu configurations are compatible as seen by rdpmc? I'm mostly ignorant of how the PMU counter offsets and such work. (Also, grr, Intel, couldn't you come up with a better interface for this?) --Andy -- 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
