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perf intel-pt/bts: Report instruction bytes and length in sample

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Change Intel PT and BTS to pass up the length and the instruction
bytes of the decoded or sampled instruction in the perf sample.

The decoder already knows this information, we just need to pass it
up. Since it is only a couple of movs it is not very expensive.

Handle instruction cache too. Make sure ilen is always initialized.

Used in the next patch.

[Adrian: re-base on top (and adjust for) instruction buffer size tidy-up]
[Adrian: add BTS support and adjust commit message accordingly]

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: http://lkml.kernel.org/r/1475847747-30994-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2016-10-07 16:42:26 +03:00 • committed by Arnaldo Carvalho de Melo
parent 32f98aab75
commit faaa87680b
6 changed files with 19 additions and 1 deletions
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1
tools/perf/util/intel-bts.c
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@ -295,6 +295,7 @@ static int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq,
sample.cpu = btsq->cpu;
sample.flags = btsq->sample_flags;
sample.insn_len = btsq->intel_pt_insn.length;
memcpy(sample.insn, btsq->intel_pt_insn.buf, INTEL_PT_INSN_BUF_SZ);
if (bts->synth_opts.inject) {
event.sample.header.size = bts->branches_event_size;