Commit 9fd629f9 authored May 26, 2017 by Adrian Hunter Committed by Arnaldo Carvalho de Melo Jun 21, 2017

perf intel-pt: Add default config for pass-through branch enable



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@intel.com>
Cc: Andi Kleen <ak@linux.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@redhat.com>

parent 83959817

tools/perf/arch/x86/util/intel-pt.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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);