On Mon, Nov 07, 2011 at 05:45:14PM +0100, Peter Zijlstra wrote: > On Mon, 2011-11-07 at 17:25 +0200, Gleb Natapov wrote: > > > Since the below programming doesn't use perf_event_attr::pinned, yes. > > > > > Yes, that is on todo :). Actually I do want to place all guest perf > > counters into the same event group and make it pinned. But currently perf > > event groups are not very flexible. In our usage scenario we can't have > > one event as a group leader since events are created and destroyed very > > dynamically. What I would like is to have something like meta event that > > will group all other real event. > > Is there a reason to have them grouped if you pin them all anyway? Hmm good question. May be we shouldn't pin then since this will prevent profiling vcpu task on a host while perf is running in a guest, but then we need to group guest created event to get meaningful result. I think I'll pin them for now and will look into grouping them later. -- Gleb. -- 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
