[PATCH 2/6] perf tools: Force sample_type for slave events

[Jiri Olsa <jolsa@kernel.org>]

Forcing sample_type setup for slave events in group
leader sessions.

We don't get sample for slave events, we make them
when delivering group leader sample. Set the slave
event to follow the master sample_type to ease up
report.

Link: http://lkml.kernel.org/n/tip-mqhyqhxm0p2jyzqjffwgbll0@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/util/evsel.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 684c893ca6bc..dfe2958e6287 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -956,6 +956,14 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
 		attr->sample_freq    = 0;
 		attr->sample_period  = 0;
 		attr->write_backward = 0;
+
+		/*
+		 * We don't get sample for slave events, we make them
+		 * when delivering group leader sample. Set the slave
+		 * event to follow the master sample_type to ease up
+		 * report.
+		 */
+		attr->sample_type = leader->attr.sample_type;
 	}
 
 	if (opts->no_samples)
-- 
2.17.2