Messages in this thread Patch in this message | | | From | Akihiro Nagai <> | Subject | [PATCH -tip v3 2/5] perf: change perf_event_header.misc to PERF_RECORD_MISC_USER for BTS | Date | Thu, 11 Aug 2011 21:06:20 +0900 |
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Change perf_event_headder.misc to PERF_RECORD_MISC_USER for BTS records, because BTS traces both kernel and user spaces nevertheless perf specifies to trace only kernel or user space.
Signed-off-by: Akihiro Nagai <akihiro.nagai.hw@hitachi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: David Ahern <dsahern@gmail.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> ---
arch/x86/kernel/cpu/perf_event_intel_ds.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 1b1ef3a..323f3f0 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -340,6 +340,14 @@ static int intel_pmu_drain_bts_buffer(void) */ perf_prepare_sample(&header, &data, event, ®s); + /* + * Since BTS can not trace kernel and user space separately, set + * PERF_RECORD_MISC_USER in header.misc to resolve both kernel and + * user DSOs and symbols. + */ + header.misc &= ~PERF_RECORD_MISC_CPUMODE_MASK; + header.misc |= PERF_RECORD_MISC_USER; + if (perf_output_begin(&handle, event, header.size * (top - at))) return 1;
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