Brice Goglin reported:

> I can easily sort them by thread id, but I don't know how to match
> my 4 events with each group of 4 lines.

Also report the counter id and the time running/enabled
stats (in case the counter got time-shared).
Reported-by: NBrice Goglin <Brice.Goglin@inria.fr>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: NBrice Goglin <Brice.Goglin@inria.fr>
Signed-off-by: NIngo Molnar <mingo@elte.hu>