Messages in this thread | | | From | Nikhil Rao <> | Date | Wed, 29 Jun 2011 17:26:12 -0700 | Subject | Re: power increase issue on light load |
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On Tue, Jun 28, 2011 at 11:55 PM, Alex,Shi <alex.shi@intel.com> wrote: >> > - Would it be possible to get a "perf sched" trace on these two kernels? > > I tried the 'perf sched record' and then 'perf sched trace' as usage > show. but in fact, the 'perf sched' doesn't support 'trace' command now.
I believe this was renamed to "perf script" in 133dc4c39c57eeef2577ca5b4ed24765b7a78ce2.
> since the 'perf sched record' is using 'perf record -e sched:xxx' to do > record. I used 'perf record' directly. The follow info collected in 300' > on my NHM-EP for benchmark bltk-office. > > [alexs@lkp-ne01 ~]$ grep -e Events.*sched > linux-2.6/perf-report-3.0.0-rc5 > # Events: 11K sched:sched_wakeup > # Events: 1K sched:sched_wakeup_new > # Events: 24K sched:sched_switch > # Events: 3K sched:sched_migrate_task > # Events: 851 sched:sched_process_free > # Events: 1K sched:sched_process_exit > # Events: 1K sched:sched_process_wait > # Events: 1K sched:sched_process_fork > # Events: 12K sched:sched_stat_wait > # Events: 9K sched:sched_stat_sleep > # Events: 452 sched:sched_stat_iowait > # Events: 16K sched:sched_stat_runtime > [alexs@lkp-ne01 ~]$ > [alexs@lkp-ne01 ~]$ > [alexs@lkp-ne01 ~]$ grep -e > Events.*sched /mnt/linux-2.6.39/perf-report-2.6.39 > # Events: 5K sched:sched_wakeup > # Events: 615 sched:sched_wakeup_new > # Events: 11K sched:sched_switch > # Events: 2K sched:sched_migrate_task > # Events: 541 sched:sched_process_free > # Events: 692 sched:sched_process_exit > # Events: 1K sched:sched_process_wait > # Events: 615 sched:sched_process_fork > # Events: 6K sched:sched_stat_wait > # Events: 4K sched:sched_stat_sleep > # Events: 178 sched:sched_stat_iowait > # Events: 9K sched:sched_stat_runtime > >
Thanks for the data but these raw counts are not very useful. Can you please send either the binary file or the ascii trace output for the two kernels? Also -- a 300s trace might be too much; about 30s should be sufficient.
-Thanks, Nikhil -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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