On Fri, 2 Sep 2016 09:43:01 -0400 Stefan Hajnoczi <stefanha@xxxxxxxxx> wrote: > Can TSC offset changes occur at runtime? > > One example is vcpu hotplug where the tracing tool would need to fetch > the new vcpu's TSC offset after tracing has already started. > > Another example is if QEMU or the guest change the TSC offset while > running. If the tracing tool doesn't notice this then trace events will have > incorrect timestamps. I believe there are tracepoints for these events. They would obviously need to be enabled for the tracer to catch them. I would also recommend that they go into their own instance to make sure other events do not overwrite them. -- Steve -- 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
