linux-kernel - [PATCH 14/21] perf tools: Add support to dump user data event info

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Message-Id: <20180124115143.14322-15-jolsa@kernel.org>
Date:   Wed, 24 Jan 2018 12:51:36 +0100
From:   Jiri Olsa <jolsa@...nel.org>
To:     Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andy Lutomirski <luto@...capital.net>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: [PATCH 14/21] perf tools: Add support to dump user data event info

Dump user data event in perf report -D, looks like this:

  0x25de3e [0x58]: event: 17
  .
  . ... raw event: size 88 bytes
  .  0000:  11 00 00 00 00 00 58 00 20 00 10 00 00 00 00 00  ......X. .......

  SNIP

  1214276524830 0x25de3e [0x58]: PERF_RECORD_USER_DATA 29014/29014: type: 0x100020, id 5
  ... FP chain: nr:5
  .....  0: fffffffffffffe00
  .....  1: 00007fadc451cd77
  .....  2: 00007fadc4504eb1
  .....  3: 00007fadc451af0f
  .....  4: 0000000000000040

Link: http://lkml.kernel.org/n/tip-d3qh6jythy3cjg3askwn8fd1@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/session.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index cb910ea6f0a0..218b36e76d4d 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1164,6 +1164,24 @@ static void dump_read(struct perf_evsel *evsel, union perf_event *event)
 		printf("... id           : %" PRIu64 "\n", read_event->id);
 }
 
+static void
+dump_user_data(union perf_event *event, struct perf_sample *sample)
+{
+	u64 type;
+
+	if (!dump_trace)
+		return;
+
+	printf(" %d/%d: type: %#" PRIx64 ", id %" PRIu64 "\n",
+	       sample->pid, sample->tid, event->user_data.type,
+	       sample->user_data_id);
+
+	type = event->user_data.type;
+
+	if (type & PERF_SAMPLE_CALLCHAIN)
+		callchain__printf(sample);
+}
+
 static struct machine *machines__find_for_cpumode(struct machines *machines,
 					       union perf_event *event,
 					       struct perf_sample *sample)
@@ -1286,6 +1304,7 @@ static int machines__deliver_event(struct machines *machines,
 		}
 		return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
 	case PERF_RECORD_USER_DATA:
+		dump_user_data(event, sample);
 		return tool->user_data(tool, event, sample, evsel, machine);
 	case PERF_RECORD_MMAP:
 		return tool->mmap(tool, event, sample, machine);
-- 
2.13.6