aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--tools/perf/Documentation/perf-trace.txt3
-rw-r--r--tools/perf/builtin-trace.c108
-rw-r--r--tools/perf/util/event.c13
3 files changed, 110 insertions, 14 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt
index 38d4b682af0b..68718ccdd178 100644
--- a/tools/perf/Documentation/perf-trace.txt
+++ b/tools/perf/Documentation/perf-trace.txt
@@ -51,6 +51,9 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
--duration:
Show only events that had a duration greater than N.M ms.
+--sched:
+ Accrue thread runtime and provide a summary at the end of the session.
+
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script[1]
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index ba055103b525..7932ffa29889 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -67,7 +67,9 @@ struct thread_trace {
u64 entry_time;
u64 exit_time;
bool entry_pending;
+ unsigned long nr_events;
char *entry_str;
+ double runtime_ms;
};
static struct thread_trace *thread_trace__new(void)
@@ -77,16 +79,21 @@ static struct thread_trace *thread_trace__new(void)
static struct thread_trace *thread__trace(struct thread *thread)
{
+ struct thread_trace *ttrace;
+
if (thread == NULL)
goto fail;
if (thread->priv == NULL)
thread->priv = thread_trace__new();
-
+
if (thread->priv == NULL)
goto fail;
- return thread->priv;
+ ttrace = thread->priv;
+ ++ttrace->nr_events;
+
+ return ttrace;
fail:
color_fprintf(stdout, PERF_COLOR_RED,
"WARNING: not enough memory, dropping samples!\n");
@@ -102,8 +109,11 @@ struct trace {
struct perf_record_opts opts;
struct machine host;
u64 base_time;
+ unsigned long nr_events;
+ bool sched;
bool multiple_threads;
double duration_filter;
+ double runtime_ms;
};
static bool trace__filter_duration(struct trace *trace, double t)
@@ -382,11 +392,37 @@ out:
return 0;
}
+static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
+ double runtime_ms = (double)runtime / NSEC_PER_MSEC;
+ struct thread *thread = machine__findnew_thread(&trace->host, sample->tid);
+ struct thread_trace *ttrace = thread__trace(thread);
+
+ if (ttrace == NULL)
+ goto out_dump;
+
+ ttrace->runtime_ms += runtime_ms;
+ trace->runtime_ms += runtime_ms;
+ return 0;
+
+out_dump:
+ printf("%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
+ evsel->name,
+ perf_evsel__strval(evsel, sample, "comm"),
+ (pid_t)perf_evsel__intval(evsel, sample, "pid"),
+ runtime,
+ perf_evsel__intval(evsel, sample, "vruntime"));
+ return 0;
+}
+
static int trace__run(struct trace *trace, int argc, const char **argv)
{
struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
struct perf_evsel *evsel;
- int err = -1, i, nr_events = 0, before;
+ int err = -1, i;
+ unsigned long before;
const bool forks = argc > 0;
if (evlist == NULL) {
@@ -400,6 +436,13 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
goto out_delete_evlist;
}
+ if (trace->sched &&
+ perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
+ trace__sched_stat_runtime)) {
+ printf("Couldn't read the sched_stat_runtime tracepoint information!\n");
+ goto out_delete_evlist;
+ }
+
err = perf_evlist__create_maps(evlist, &trace->opts.target);
if (err < 0) {
printf("Problems parsing the target to trace, check your options!\n");
@@ -444,7 +487,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
trace->multiple_threads = evlist->threads->map[0] == -1 || evlist->threads->nr > 1;
again:
- before = nr_events;
+ before = trace->nr_events;
for (i = 0; i < evlist->nr_mmaps; i++) {
union perf_event *event;
@@ -454,7 +497,7 @@ again:
tracepoint_handler handler;
struct perf_sample sample;
- ++nr_events;
+ ++trace->nr_events;
err = perf_evlist__parse_sample(evlist, event, &sample);
if (err) {
@@ -495,7 +538,7 @@ again:
}
}
- if (nr_events == before) {
+ if (trace->nr_events == before) {
if (done)
goto out_delete_evlist;
@@ -513,6 +556,51 @@ out:
return err;
}
+static size_t trace__fprintf_threads_header(FILE *fp)
+{
+ size_t printed;
+
+ printed = fprintf(fp, "\n _____________________________________________________________________\n");
+ printed += fprintf(fp," __) Summary of events (__\n\n");
+ printed += fprintf(fp," [ task - pid ] [ events ] [ ratio ] [ runtime ]\n");
+ printed += fprintf(fp," _____________________________________________________________________\n\n");
+
+ return printed;
+}
+
+static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
+{
+ size_t printed = trace__fprintf_threads_header(fp);
+ struct rb_node *nd;
+
+ for (nd = rb_first(&trace->host.threads); nd; nd = rb_next(nd)) {
+ struct thread *thread = rb_entry(nd, struct thread, rb_node);
+ struct thread_trace *ttrace = thread->priv;
+ const char *color;
+ double ratio;
+
+ if (ttrace == NULL)
+ continue;
+
+ ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
+
+ color = PERF_COLOR_NORMAL;
+ if (ratio > 50.0)
+ color = PERF_COLOR_RED;
+ else if (ratio > 25.0)
+ color = PERF_COLOR_GREEN;
+ else if (ratio > 5.0)
+ color = PERF_COLOR_YELLOW;
+
+ printed += color_fprintf(fp, color, "%20s", thread->comm);
+ printed += fprintf(fp, " - %-5d :%11lu [", thread->pid, ttrace->nr_events);
+ printed += color_fprintf(fp, color, "%5.1f%%", ratio);
+ printed += fprintf(fp, " ] %10.3f ms\n", ttrace->runtime_ms);
+ }
+
+ return printed;
+}
+
static int trace__set_duration(const struct option *opt, const char *str,
int unset __maybe_unused)
{
@@ -563,6 +651,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_CALLBACK(0, "duration", &trace, "float",
"show only events with duration > N.M ms",
trace__set_duration),
+ OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
OPT_END()
};
int err;
@@ -587,5 +676,10 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
if (!argc && perf_target__none(&trace.opts.target))
trace.opts.target.system_wide = true;
- return trace__run(&trace, argc, argv);
+ err = trace__run(&trace, argc, argv);
+
+ if (trace.sched && !err)
+ trace__fprintf_thread_summary(&trace, stdout);
+
+ return err;
}
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 0ae444ef1429..ca9ca285406a 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -405,16 +405,15 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
if (*end) /* only interested in proper numerical dirents */
continue;
-
- if (__event__synthesize_thread(comm_event, mmap_event, pid, 1,
- process, tool, machine) != 0) {
- err = -1;
- goto out_closedir;
- }
+ /*
+ * We may race with exiting thread, so don't stop just because
+ * one thread couldn't be synthesized.
+ */
+ __event__synthesize_thread(comm_event, mmap_event, pid, 1,
+ process, tool, machine);
}
err = 0;
-out_closedir:
closedir(proc);
out_free_mmap:
free(mmap_event);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 17:12:56 +0000