On Mon, Jun 05, 2023 at 11:27:31AM +0200, Peter Zijlstra wrote: > On Mon, Jun 05, 2023 at 08:10:15AM +0100, Mark Rutland wrote: > > > How does this work on x86? Do you have pseudo-PMUs for PERF_TYPE_HARDWARE and > > PERF_TYPE_RAW ? > > Generic code maps TYPE_HARDWARE and TYPE_HW_CACHE to TYPE_RAW for a > first go, only if that fails it will try the actual type. > > And x86 has the (first) CPU PMU has TYPE_RAW, on hybrid, it will > transparently pick the right actual PMU. Oh, I might've misread that last bit.. TYPE_RAW is always the big core, it will not magic the thing. If you want little events you gotta manually find the little pmu.
