commit 8bf00a529967dafbbb210b377c38a15834d1e979: " KVM: VMX: add support for switching of PERF_GLOBAL_CTRL " was as far as I can tell supposed to bring about performance improvement on hardware that supports it? Instead it seems to make the typical case (not running guest under perf) a bit slower than it used to be. the cost of VMexit goes up by about 50 cycles on sandy bridge where the optimization in question actually is activated. Why that's not a large regression, it's a far cry from actually helping performance. So are we better off not using this feature? What kind of workload is improved by this change? -- 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
