Messages in this thread | | | Date | Fri, 24 Jul 2020 16:51:42 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH V7 07/14] perf/core: Add a new PERF_EV_CAP_COEXIST event capability |
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On Fri, Jul 24, 2020 at 07:39:08AM -0700, Andi Kleen wrote: > > The consequence is that SLOTS must be the leader, is that really a > > problem? You keep providing the {cycles, slots, metric-things} example, > > Yes that's a problem. One (major) use case for topdown is to > sample on lots of different events, but always create groups that > also measure topdown metrics for that sampling period. For that we need > other leaders.
Apparently the only problem here is the tool, the kernel doesn't care which events in a group are sampling, there could be multiple.
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