Re: [PATCH V6 09/14] perf/x86/intel: Support TopDown metrics on Ice Lake

[Andi Kleen]

> Also, that for_each_set_bit() loop, trying to find the events to
> update...
> 
> Can't we, instead, make the SLOTS update advance 5 running counters in
> cpuc and feed the events off of that?

The original patches implemented this through a perf transaction and a
cache.  I think what you're suggesting is similar to the old cache.

-Andi