perf, x86: Fix incorrect branches event on AMD CPUs
While doing some performance counter validation tests on some assembly language programs I noticed that the "branches:u" count was very wrong on AMD machines. It looks like the wrong event was selected. Signed-off-by: Vince Weaver <vweaver1@eecs.utk.edu> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Borislav Petkov <borislav.petkov@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: <stable@kernel.org> LKML-Reference: <alpine.DEB.2.00.1007011526010.23160@cl320.eecs.utk.edu> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -102,8 +102,8 @@ static const u64 amd_perfmon_event_map[] =
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[PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0,
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[PERF_COUNT_HW_CACHE_REFERENCES] = 0x0080,
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[PERF_COUNT_HW_CACHE_MISSES] = 0x0081,
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[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4,
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[PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5,
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[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c2,
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[PERF_COUNT_HW_BRANCH_MISSES] = 0x00c3,
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};
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static u64 amd_pmu_event_map(int hw_event)
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