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perf intel-pt: Add decoder flags for trace begin / end 

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>
This commit is contained in:
Adrian Hunter 2018-09-20 16:00:47 +03:00 committed by Arnaldo Carvalho de Melo
parent 2dcde4e152
commit c6b5da093a
2 changed files with 7 additions and 0 deletions
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2
tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
View File

@ -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 {

5
tools/perf/util/intel-pt.c
View File

@ -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,