Messages in this thread | | | Date | Mon, 3 Jul 2017 09:58:32 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCH V2 2/2] perf tools: always set no branch for dummy event in PT |
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On Fri, Jun 30, 2017 at 10:16:56AM -0400, kan.liang@intel.com wrote: > From: Kan Liang <kan.liang@intel.com> > > An earlier kernel patch allowed enabling PT and LBR at the same time on > Goldmont. > > commit ccbebba4c6bf ("perf/x86/intel/pt: Bypass PT vs. LBR exclusivity > if the core supports it") > > However, users still cannot use Intel PT and LBRs simultaneously. > $ sudo perf record -e cycles,intel_pt//u -b -- sleep 1 > Error: > PMU Hardware doesn't support sampling/overflow-interrupts. > > PT implicitly adds dummy event in perf tool. dummy event is software > event which doesn't support LBR. > > Always setting no branch for dummy event in Intel PT. > > Signed-off-by: Kan Liang <kan.liang@intel.com>
for the patchset:
Acked-by: Jiri Olsa <jolsa@kernel.org>
thanks, jirka
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