Re: [PATCH 0/5] Support metric group constraint

[Andi Kleen]

> For other metric groups, even they have cycles, the issue should not be
> triggered.
> For example, if they have 4 or less events, the cycles can be scheduled to
> GP counter instead.
> If they have 6 or more events, the weak group will be reject anyway.
> Perf tool will open it as non-group (standalone metrics).

Technically it can also happen for 9 events with Hyper Threading off or
on Icelake (8 generic counters)

I didn't think we had any of those, but please double check.

-Andi