perf intel-pt: Add decoder flags for trace begin / end (c6b5da09) · Commits · 戴 / test

Previously, the decoder would indicate begin / end by a branch from / to zero. That hides useful information, in particular when a trace ends with a call. To prepare for remedying that, add Intel PT decoder flags for trace begin / end and map them to the existing sample flags. Signed-off-by:

Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/20180920130048.31432-6-adrian.hunter@intel.com Signed-off-by:

Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/intel-pt-decoder/intel-pt-decoder.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,8 @@ enum intel_pt_sample_type {
		INTEL_PT_EX_STOP = 1 << 6,
		INTEL_PT_PWR_EXIT = 1 << 7,
		INTEL_PT_CBR_CHG = 1 << 8,
		INTEL_PT_TRACE_BEGIN = 1 << 9,
		INTEL_PT_TRACE_END = 1 << 10,
		};

		enum intel_pt_period_type {

tools/perf/util/intel-pt.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -908,6 +908,11 @@ static void intel_pt_sample_flags(struct intel_pt_queue *ptq)
		ptq->insn_len = ptq->state->insn_len;
		memcpy(ptq->insn, ptq->state->insn, INTEL_PT_INSN_BUF_SZ);
		}

		if (ptq->state->type & INTEL_PT_TRACE_BEGIN)
		ptq->flags \|= PERF_IP_FLAG_TRACE_BEGIN;
		if (ptq->state->type & INTEL_PT_TRACE_END)
		ptq->flags \|= PERF_IP_FLAG_TRACE_END;
		}

		static int intel_pt_setup_queue(struct intel_pt *pt,

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