Messages in this thread | | | Date | Sun, 6 Dec 2015 23:06:51 +0100 | From | Peter Zijlstra <> | Subject | Re: [tip:perf/core] perf/x86: Use INST_RETIRED.PREC_DIST for cycles: ppp |
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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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