On Thu, 2013-06-20 at 14:53 -0400, Steven Rostedt wrote:
> Oh wait, I just noticed Oleg's:
>
> # perf record -e sched:sched_switch -p1 &
>
> I missed that.
>
> bah, time to re-run it.
>
New update, after running with the above command:
[root@ixf ~]# cat perf-bench-sched.before.2 | tail -20
Total time: 11.833 [sec]
11.833804 usecs/op
84503 ops/sec
Performance counter stats for process id '1' (100 runs):
<not counted> task-clock
<not counted> context-switches
<not counted> cpu-migrations
<not counted> page-faults
<not counted> cycles
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
<not counted> instructions
<not counted> branches
<not counted> branch-misses
11.955755673 seconds time elapsed
( +- 0.05% )
[root@ixf ~]# cat perf-bench-sched.after-2 | tail -20
Total time: 11.490 [sec]
11.490764 usecs/op
87026 ops/sec
Performance counter stats for process id '1' (100 runs):
<not counted> task-clock
<not counted> context-switches
<not counted> cpu-migrations
<not counted> page-faults
<not counted> cycles
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
<not counted> instructions
<not counted> branches
<not counted> branch-misses
11.511847099 seconds time elapsed
( +- 0.05% )
OK, this does give us a slight improvement. Approximately 4%.
-- Steve
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