summaryrefslogtreecommitdiff
path: root/tools/perf/builtin-trace.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/builtin-trace.c')
-rw-r--r--tools/perf/builtin-trace.c32
1 files changed, 28 insertions, 4 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index ddb6e3721b1a..82ffa6c246d8 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -100,8 +100,14 @@ struct trace {
struct machine host;
u64 base_time;
bool multiple_threads;
+ double duration_filter;
};
+static bool trace__filter_duration(struct trace *trace, double t)
+{
+ return t < (trace->duration_filter * NSEC_PER_MSEC);
+}
+
static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
{
double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
@@ -307,8 +313,10 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
printed += syscall__scnprintf_args(sc, msg + printed, 1024 - printed, args);
if (!strcmp(sc->name, "exit_group") || !strcmp(sc->name, "exit")) {
- trace__fprintf_entry_head(trace, thread, 1, sample->time, stdout);
- printf("%-70s\n", ttrace->entry_str);
+ if (!trace->duration_filter) {
+ trace__fprintf_entry_head(trace, thread, 1, sample->time, stdout);
+ printf("%-70s\n", ttrace->entry_str);
+ }
} else
ttrace->entry_pending = true;
@@ -333,8 +341,12 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
ttrace->exit_time = sample->time;
- if (ttrace->entry_time)
+ if (ttrace->entry_time) {
duration = sample->time - ttrace->entry_time;
+ if (trace__filter_duration(trace, duration))
+ goto out;
+ } else if (trace->duration_filter)
+ goto out;
trace__fprintf_entry_head(trace, thread, duration, sample->time, stdout);
@@ -358,7 +370,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
printf(") = %d", ret);
putchar('\n');
-
+out:
ttrace->entry_pending = false;
return 0;
@@ -495,6 +507,15 @@ out:
return err;
}
+static int trace__set_duration(const struct option *opt, const char *str,
+ int unset __maybe_unused)
+{
+ struct trace *trace = opt->value;
+
+ trace->duration_filter = atof(str);
+ return 0;
+}
+
int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
{
const char * const trace_usage[] = {
@@ -533,6 +554,9 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
"number of mmap data pages"),
OPT_STRING(0, "uid", &trace.opts.target.uid_str, "user",
"user to profile"),
+ OPT_CALLBACK(0, "duration", &trace, "float",
+ "show only events with duration > N.M ms",
+ trace__set_duration),
OPT_END()
};
int err;