Re: [PATCH V3 0/5] Support auto counter reload

[Andi Kleen]

> > the branch-instructions is overflowed. So the "cause" event is the
> > branch-instructions event. The acr_mask is set to 0x2, since the
> > event index of branch-instructions is 1.
> >
> What is your definition of 'event index' here? Is it the position on
> the cmdline?

It's the index into the group.

-Andi