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Date: Tue, 26 Nov 2013 17:51:13 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Paul Mackerras <paulus@...ba.org>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung.kim@....com>,
LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 2/2] perf script: Print mmap[2] events also
If --show-mmap-events option is given, also print internal MMAP and
MMAP2 events. It would be helpful for debugging.
$ perf script --show-mmap-events
...
sleep 9486 [009] 3350640.335531: PERF_RECORD_MMAP 9486/9486: [0x400000(0x6000) @ 0]: x /usr/bin/sleep
sleep 9486 [009] 3350640.335542: PERF_RECORD_MMAP 9486/9486: [0x3153a00000(0x223000) @ 0]: x /usr/lib64/ld-2.17.so
sleep 9486 [009] 3350640.335553: PERF_RECORD_MMAP 9486/9486: [0x7fff8b5fe000(0x2000) @ 0x7fff8b5fe000]: x [vdso]
sleep 9486 [009] 3350640.335643: PERF_RECORD_MMAP 9486/9486: [0x3153e00000(0x3c0000) @ 0]: x /usr/lib64/libc-2.17.so
Suggested-by: Frederic Weisbecker <fweisbec@...il.com>
Reviewed-by: David Ahern <dsahern@...il.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/perf/Documentation/perf-script.txt | 3 ++
tools/perf/builtin-script.c | 69 ++++++++++++++++++++++++++++++++
2 files changed, 72 insertions(+)
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 67af9b77ea78..cfdbb1e045b5 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -206,6 +206,9 @@ OPTIONS
--show-task-events
Display task related events (e.g. FORK, COMM, EXIT).
+--show-mmap-events
+ Display mmap related events (e.g. MMAP, MMAP2).
+
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script-perl[1],
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index e2b9aff6506e..6b5d6f10e24e 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -573,6 +573,7 @@ struct perf_script {
struct perf_tool tool;
struct perf_session *session;
bool show_task_events;
+ bool show_mmap_events;
};
static int process_attr(struct perf_tool *tool, union perf_event *event,
@@ -698,6 +699,68 @@ static int process_exit_event(struct perf_tool *tool,
return 0;
}
+static int process_mmap_event(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct thread *thread;
+ struct perf_script *script = container_of(tool, struct perf_script, tool);
+ struct perf_session *session = script->session;
+ struct perf_evsel *evsel = perf_evlist__first(session->evlist);
+
+ if (perf_event__process_mmap(tool, event, sample, machine) < 0)
+ return -1;
+
+ thread = machine__findnew_thread(machine, event->mmap.pid, event->mmap.tid);
+ if (thread == NULL) {
+ pr_debug("problem processing MMAP event, skipping it.\n");
+ return -1;
+ }
+
+ if (!evsel->attr.sample_id_all) {
+ sample->cpu = 0;
+ sample->time = 0;
+ sample->tid = event->comm.tid;
+ sample->pid = event->comm.pid;
+ }
+ print_sample_start(sample, thread, evsel);
+ perf_event__fprintf(event, stdout);
+
+ return 0;
+}
+
+static int process_mmap2_event(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct thread *thread;
+ struct perf_script *script = container_of(tool, struct perf_script, tool);
+ struct perf_session *session = script->session;
+ struct perf_evsel *evsel = perf_evlist__first(session->evlist);
+
+ if (perf_event__process_mmap2(tool, event, sample, machine) < 0)
+ return -1;
+
+ thread = machine__findnew_thread(machine, event->mmap2.pid, event->mmap2.tid);
+ if (thread == NULL) {
+ pr_debug("problem processing MMAP2 event, skipping it.\n");
+ return -1;
+ }
+
+ if (!evsel->attr.sample_id_all) {
+ sample->cpu = 0;
+ sample->time = 0;
+ sample->tid = event->mmap2.tid;
+ sample->pid = event->mmap2.pid;
+ }
+ print_sample_start(sample, thread, evsel);
+ perf_event__fprintf(event, stdout);
+
+ return 0;
+}
+
static void sig_handler(int sig __maybe_unused)
{
session_done = 1;
@@ -715,6 +778,10 @@ static int __cmd_script(struct perf_script *script)
script->tool.fork = process_fork_event;
script->tool.exit = process_exit_event;
}
+ if (script->show_mmap_events) {
+ script->tool.mmap = process_mmap_event;
+ script->tool.mmap2 = process_mmap2_event;
+ }
ret = perf_session__process_events(script->session, &script->tool);
@@ -1480,6 +1547,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
"Show the path of [kernel.kallsyms]"),
OPT_BOOLEAN('\0', "show-task-events", &script.show_task_events,
"Show the fork/comm/exit events"),
+ OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,
+ "Show the mmap events"),
OPT_END()
};
const char * const script_usage[] = {
--
1.7.11.7
--
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