> > @@ -198,8 +200,9 @@ enum perf_event_read_format {
> >     PERF_FORMAT_TOTAL_TIME_RUNNING          = 1U << 1,
> >     PERF_FORMAT_ID                          = 1U << 2,
> >     PERF_FORMAT_GROUP                       = 1U << 3,
> > +   PERF_FORMAT_WEIGHT                      = 1U << 4,
> 
> what's PERF_FORMAT_WEIGHT for?

It was used in a earlier iteration, but is now obsolete. I'll remove it.

-Andi

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