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[tip:perf/core] perf intel-pt: Set no_aux_samples for the tracking event

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  [tip:perf/core] perf intel-pt: Set no_aux_samples for the tracking  event tip-bot for Kan Liang <tipbot@zytor.com> - 2017-07-26 19:20 +0200

#1697394 — [tip:perf/core] perf intel-pt: Set no_aux_samples for the tracking event

Commit-ID:  69d8bd8aa7d8906a1e922ae884d97f0bd7f1b269
Gitweb:     http://git.kernel.org/tip/69d8bd8aa7d8906a1e922ae884d97f0bd7f1b269
Author:     Kan Liang <kan.liang@intel.com>
AuthorDate: Fri, 30 Jun 2017 10:16:55 -0400
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 20 Jul 2017 09:55:50 -0300

perf intel-pt: Set no_aux_samples for the tracking event

The reason of introducing the tracking event (a dummy software event) is
to collect side-band information. Additional sampling is wasteful.
no_aux_samples should be set for tracking event.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170630141656.1626-1-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/arch/x86/util/intel-pt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
index 9535be5..4a461e8 100644
--- a/tools/perf/arch/x86/util/intel-pt.c
+++ b/tools/perf/arch/x86/util/intel-pt.c
@@ -752,6 +752,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
 		tracking_evsel->attr.freq = 0;
 		tracking_evsel->attr.sample_period = 1;
 
+		tracking_evsel->no_aux_samples = true;
 		if (need_immediate)
 			tracking_evsel->immediate = true;
 

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