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-rw-r--r--tools/perf/util/evsel.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 727dae445d..3536404e94 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -2850,6 +2850,39 @@ u64 evsel__intval_common(struct evsel *evsel, struct perf_sample *sample, const
return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
}
+char evsel__taskstate(struct evsel *evsel, struct perf_sample *sample, const char *name)
+{
+ static struct tep_format_field *prev_state_field;
+ static const char *states;
+ struct tep_format_field *field;
+ unsigned long long val;
+ unsigned int bit;
+ char state = '?'; /* '?' denotes unknown task state */
+
+ field = evsel__field(evsel, name);
+
+ if (!field)
+ return state;
+
+ if (!states || field != prev_state_field) {
+ states = parse_task_states(field);
+ if (!states)
+ return state;
+ prev_state_field = field;
+ }
+
+ /*
+ * Note since the kernel exposes TASK_REPORT_MAX to userspace
+ * to denote the 'preempted' state, we might as welll report
+ * 'R' for this case, which make senses to users as well.
+ *
+ * We can change this if we have a good reason in the future.
+ */
+ val = evsel__intval(evsel, sample, name);
+ bit = val ? ffs(val) : 0;
+ state = (!bit || bit > strlen(states)) ? 'R' : states[bit-1];
+ return state;
+}
#endif
bool evsel__fallback(struct evsel *evsel, struct target *target, int err,