Messages in this thread | | | Date | Thu, 6 Jan 2022 16:33:20 +0000 | Subject | Re: [RFC PATCH 1/1] perf arm64: Implement --topdown with metrics | From | Andrew Kilroy <> |
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On 15/12/2021 12:53, John Garry wrote: >>> 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 > events" >
John,
Andi requested that the json metrics be disabled on x86 in
https://lore.kernel.org/linux-perf-users/12e0deef-08db-445f-4958-bcd5c3e10367@linux.intel.com/#t
If we do that, do you still think the --topdown=<arg> modification is needed? I guess it would have to report an error if someone requests --topdown=json-metrics on x86.
Thanks, Andrew
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