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SubjectRe: [RFC PATCH 1/1] perf arm64: Implement --topdown with metrics
>> In addition we could also add a --topdown arg to force using JSON 
>> metricgroups.
> What arg do think would be supplied?

something like -json or -metricgroup, meaning "Use pmu-events metric
events to calculate topdown results rather than kernel CPU PMU events.
This is default fallback if the kernel CPU PMU does not support topdown

>> Did you actually test this patch? I have something experimental
>> working from some time ago, and it was more complicated than this. I
>> need to check the code again...
> I got stats back from this implementation, yes.  Let me know if there's
> things my patch isn't catering for.

I'll give it a spin...


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