lkml.org 
[lkml]   [2011]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Date
    SubjectRe: power increase issue on light load
    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/

    \
     
     \ /
      Last update: 2011-06-30 02:29    [W:0.024 / U:31.752 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site