On Fri, Aug 11, 2017 at 12:18:07PM +0100, Mark Rutland wrote: SNIP
> > I'm also confused by perf_output_read_group() when event == leader. > AFAICT, in that case we won't read() the event at all, and we'll only > read() the siblings. Is that right? I think we assume perf_output_read_group is only called from event's PMI which means it's already been called for event jirka
