linux-kernel - [PATCH v1 4/4] perf intel-pt, intel-bts: Suppress useless AUX records by default

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Date:   Tue, 14 Nov 2017 14:30:24 +0200
From:   Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:     Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:     Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        Will Deacon <will.deacon@....com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: [PATCH v1 4/4] perf intel-pt, intel-bts: Suppress useless AUX records by default

This makes use of the shiny new attr::suppress_aux that suppresses the
AUX records that don't carry any 'interesting' information for the
decoders, that is PERF_RECORD_AUX[flag==OVERWRITE], which just stack up
in the DATA buffer for no good reason.

Signed-off-by: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
---
 tools/perf/arch/x86/util/auxtrace.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/arch/x86/util/auxtrace.c b/tools/perf/arch/x86/util/auxtrace.c
index 6aa3f2a38321..5700e6099608 100644
--- a/tools/perf/arch/x86/util/auxtrace.c
+++ b/tools/perf/arch/x86/util/auxtrace.c
@@ -45,6 +45,8 @@ struct auxtrace_record *auxtrace_record__init_intel(struct perf_evlist *evlist,
 			if (intel_bts_pmu &&
 			    evsel->attr.type == intel_bts_pmu->type)
 				found_bts = true;
+			if (found_pt || found_bts)
+				evsel->attr.suppress_aux = 1;
 		}
 	}
 
-- 
2.15.0