[tip:perf/core] perf intel-pt: Add callchain to synthesized PEBS sample

tip-bot for Adrian Hunter
2019-06-22T06:43:23Z

Commit-ID: e01f0ef509ea7e76929f24a074d241de52c6f82a
Gitweb: https://git.kernel.org/tip/e01f0ef509ea7e76929f24a074d241de52c6f82a
Author: Adrian Hunter <adrian.hunter@intel.com>
AuthorDate: Mon, 10 Jun 2019 10:28:03 +0300
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 17 Jun 2019 15:57:18 -0300

perf intel-pt: Add callchain to synthesized PEBS sample

Like other synthesized events, if there is also an Intel PT branch
trace, then a call stack can also be synthesized. Add that.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190610072803.10456-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/intel-pt.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index bf7647897e8a..550db6e77968 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -1730,6 +1730,14 @@ static int intel_pt_synth_pebs_sample(struct intel_pt_queue *ptq)
sample.time = tsc_to_perf_time(timestamp, &pt->tc);
}

+ if (sample_type & PERF_SAMPLE_CALLCHAIN &&
+ pt->synth_opts.callchain) {
+ thread_stack__sample(ptq->thread, ptq->cpu, ptq->chain,
+ pt->synth_opts.callchain_sz, sample.ip,
+ pt->kernel_start);
+ sample.callchain = ptq->chain;
+ }
+
if (sample_type & PERF_SAMPLE_REGS_INTR &&
items->mask[INTEL_PT_GP_REGS_POS]) {
u64 regs[sizeof(sample.intr_regs.mask)];