Messages in this thread | | | From | Namhyung Kim <> | Date | Wed, 12 Oct 2022 09:12:32 -0700 | Subject | Re: [PATCH V2 2/6] perf/x86/intel/pebs: Fix PEBS timestamps overwritten |
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Hi Peter,
On Wed, Oct 12, 2022 at 1:05 AM Peter Zijlstra <peterz@infradead.org> wrote: > > On Tue, Oct 11, 2022 at 11:20:54AM -0700, Namhyung Kim wrote: > > > One thing I noticed is that the system has a config option > > CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y. > > You can't build x86 without that.
Oh, I didn't know that.. so it's not a config problem.
Kan, could you check the following command?
$ perf record -e cycles:upp dd if=/dev/zero of=/dev/null count=10000
Thanks, Namhyung
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