On Tue, Nov 20, 2018 at 02:38:54PM -0800, Andi Kleen wrote: > > In fact, I'll argue FREEZE_ON_OVERFLOW is unfixably broken for > > independent counters, because while one counter overflows, we'll stall > > counting on all others until we've handled the PMI. > > > > Even though the PMI might not be for them and they very much want/need > > to continue counting. > > We stop all counters in any case for the PMI. With freeze-on-PMI it just > happens slightly earlier.
Hiding the PMI is fine and good. The PMI is not the workload. Stopping it earlier is _NOT_ good, it hides your actual workload.
