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Message-Id: <20170621180245.23134-18-acme@kernel.org>
Date: Wed, 21 Jun 2017 15:02:37 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Adrian Hunter <adrian.hunter@...el.com>,
Andi Kleen <ak@...ux.intel.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 17/25] perf intel-pt: Add default config for pass-through branch enable
From: Adrian Hunter <adrian.hunter@...el.com>
Branch tracing is enabled by default, so a fake config bit called 'pt'
(pass-through) was added to allow the 'branch enable' bit to have affect.
Add default config 'pt,branch' which will allow users to disable branch
tracing using 'branch=0' instead of having to specify 'pt,branch=0'.
Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-12-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/arch/x86/util/intel-pt.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
index 6fe667b3269e..9535be57033f 100644
--- a/tools/perf/arch/x86/util/intel-pt.c
+++ b/tools/perf/arch/x86/util/intel-pt.c
@@ -192,6 +192,7 @@ static u64 intel_pt_default_config(struct perf_pmu *intel_pt_pmu)
int psb_cyc, psb_periods, psb_period;
int pos = 0;
u64 config;
+ char c;
pos += scnprintf(buf + pos, sizeof(buf) - pos, "tsc");
@@ -225,6 +226,10 @@ static u64 intel_pt_default_config(struct perf_pmu *intel_pt_pmu)
}
}
+ if (perf_pmu__scan_file(intel_pt_pmu, "format/pt", "%c", &c) == 1 &&
+ perf_pmu__scan_file(intel_pt_pmu, "format/branch", "%c", &c) == 1)
+ pos += scnprintf(buf + pos, sizeof(buf) - pos, ",pt,branch");
+
pr_debug2("%s default config: %s\n", intel_pt_pmu->name, buf);
intel_pt_parse_terms(&intel_pt_pmu->format, buf, &config);
--
2.9.4
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