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-rw-r--r--tools/perf/Documentation/perf-script.txt4
-rw-r--r--tools/perf/builtin-script.c31
2 files changed, 35 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index c82df572fac2..e2fec5fc21e7 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -222,6 +222,10 @@ OPTIONS
--show-mmap-events
Display mmap related events (e.g. MMAP, MMAP2).
+--show-switch-events
+ Display context switch events i.e. events of type PERF_RECORD_SWITCH or
+ PERF_RECORD_SWITCH_CPU_WIDE.
+
--header
Show perf.data header.
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 8a8e2ead6382..bd31380122f9 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -623,6 +623,7 @@ struct perf_script {
struct perf_session *session;
bool show_task_events;
bool show_mmap_events;
+ bool show_switch_events;
};
static int process_attr(struct perf_tool *tool, union perf_event *event,
@@ -813,6 +814,32 @@ static int process_mmap2_event(struct perf_tool *tool,
return 0;
}
+static int process_switch_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__id2evsel(session->evlist, sample->id);
+
+ if (perf_event__process_switch(tool, event, sample, machine) < 0)
+ return -1;
+
+ thread = machine__findnew_thread(machine, sample->pid,
+ sample->tid);
+ if (thread == NULL) {
+ pr_debug("problem processing SWITCH event, skipping it.\n");
+ return -1;
+ }
+
+ print_sample_start(sample, thread, evsel);
+ perf_event__fprintf(event, stdout);
+ thread__put(thread);
+ return 0;
+}
+
static void sig_handler(int sig __maybe_unused)
{
session_done = 1;
@@ -834,6 +861,8 @@ static int __cmd_script(struct perf_script *script)
script->tool.mmap = process_mmap_event;
script->tool.mmap2 = process_mmap2_event;
}
+ if (script->show_switch_events)
+ script->tool.context_switch = process_switch_event;
ret = perf_session__process_events(script->session);
@@ -1618,6 +1647,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
"Show the fork/comm/exit events"),
OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,
"Show the mmap events"),
+ OPT_BOOLEAN('\0', "show-switch-events", &script.show_switch_events,
+ "Show context switch events (if recorded)"),
OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
"Instruction Tracing options",