Messages in this thread | | | Subject | Re: [PATCH 0/3] tracing/perf: perf_trace_buf/perf_xxx hacks. | From | Steven Rostedt <> | Date | Thu, 20 Jun 2013 18:20:47 -0400 |
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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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