Re: [tip:perf/core] perf/x86: Use INST_RETIRED.PREC_DIST for cycles: ppp

[Peter Zijlstra]

On Sun, Dec 06, 2015 at 02:11:02PM +0100, Ingo Molnar wrote:
> Also, I'm not convinced we need a new 'ppp' qualifier for any of this, why not 
> just replace 'pp' with this event - 'pp' is meant to be our most precise event.

I requested this because the PREC_DIST events can only be scheduled on a
single counter, whereas the existing :pp events can be had on all 4.

This mean you can have 2 concurrent :pp users (without RR), but not :ppp.
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