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perf sched: Remove nr_state_machine_bugs in perf latency

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As we do not use .success in sched_wakeup event any more, then
we can not guarantee that the task when wakeup event happen is
out of run queue. So the message of nr_state_machine_bugs is
not correct.

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Link: http://lkml.kernel.org/r/1399945101-21736-1-git-send-email-yangds.fnst@cn.fujitsu.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
This commit is contained in:
Dongsheng Yang 2014-05-13 10:38:21 +09:00 • committed by Jiri Olsa
parent 0680ee7db1
commit 67d6259dd0
1 changed files with 8 additions and 11 deletions
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19
tools/perf/builtin-sched.c
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@ -149,7 +149,6 @@ struct perf_sched {
unsigned long nr_runs; unsigned long nr_runs;
unsigned long nr_timestamps; unsigned long nr_timestamps;
unsigned long nr_unordered_timestamps; unsigned long nr_unordered_timestamps;
unsigned long nr_state_machine_bugs;
unsigned long nr_context_switch_bugs; unsigned long nr_context_switch_bugs;
unsigned long nr_events; unsigned long nr_events;
unsigned long nr_lost_chunks; unsigned long nr_lost_chunks;
@ -1032,12 +1031,18 @@ static int latency_wakeup_event(struct perf_sched *sched,
atom = list_entry(atoms->work_list.prev, struct work_atom, list); atom = list_entry(atoms->work_list.prev, struct work_atom, list);
/* /*
* As we do not guarantee the wakeup event happens when
* task is out of run queue, also may happen when task is
* on run queue and wakeup only change ->state to TASK_RUNNING,
* then we should not set the ->wake_up_time when wake up a
* task which is on run queue.
*
* You WILL be missing events if you've recorded only * You WILL be missing events if you've recorded only
* one CPU, or are only looking at only one, so don't * one CPU, or are only looking at only one, so don't
* make useless noise. * skip in this case.
*/ */
if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING) if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
sched->nr_state_machine_bugs++; return 0;
sched->nr_timestamps++; sched->nr_timestamps++;
if (atom->sched_out_time > timestamp) { if (atom->sched_out_time > timestamp) {
@ -1496,14 +1501,6 @@ static void print_bad_events(struct perf_sched *sched)
(double)sched->nr_lost_events/(double)sched->nr_events * 100.0, (double)sched->nr_lost_events/(double)sched->nr_events * 100.0,
sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks); sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks);
} }
if (sched->nr_state_machine_bugs && sched->nr_timestamps) {
printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
(double)sched->nr_state_machine_bugs/(double)sched->nr_timestamps*100.0,
sched->nr_state_machine_bugs, sched->nr_timestamps);
if (sched->nr_lost_events)
printf(" (due to lost events?)");
printf("\n");
}
if (sched->nr_context_switch_bugs && sched->nr_timestamps) { if (sched->nr_context_switch_bugs && sched->nr_timestamps) {
printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)", printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
(double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0, (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0,