Re: [RFC PATCH 0/7] Share events between metrics

quoted

- without this change events within a metric may get scheduled
  together, after they may appear as part of a larger group and be
  multiplexed at different times, lowering accuracy - however, less
  multiplexing may compensate for this.

I agree the heuristic in this patch set is naive and would welcome to
improve it from your toplev experience. I think this change is
progress on TopDownL1 - would you agree?

TopdownL1 in non SMT mode should always fit. Inside a group
deduping always makes sense. 

The problem is SMT mode where it doesn't fit. toplev tries
to group each node and each level together.

I'm wondering if what is needed are flags to control behavior. For
example, avoiding the use of groups altogether. For TopDownL1 I see.

Yes the current situation isn't great.

For Topdown your patch clearly is an improvement, I'm not sure
it's for everything though.

Probably the advanced heuristics are only useful for a few
formulas, most are very simple. So maybe it's ok. I guess
would need some testing over the existing formulas.


-Andi