Eric Lee / smarc-fsl-linux-kernel

17 Jul, 2007

1 commit

  • c5c061b8f   Add a flag to indicate deferrable timers in /proc/timer_stats ... Browse Code »

    Add a flag in /proc/timer_stats to indicate deferrable timers. This will
    let developers/users to differentiate between types of tiemrs in
    /proc/timer_stats.

    Deferrable timer and normal timer will appear in /proc/timer_stats as below.
    10D, 1 swapper queue_delayed_work_on (delayed_work_timer_fn)
    10, 1 swapper queue_delayed_work_on (delayed_work_timer_fn)

    Also version of timer_stats changes from v0.1 to v0.2

    Signed-off-by: Venkatesh Pallipadi
    Acked-by: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: john stultz
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Venki Pallipadi
     

01 Jun, 2007

1 commit

  • c1a834dc7   timer stats: speedups ... Browse Code »

    Make timer-stats have almost zero overhead when enabled in the config but
    not used. (this way distros can enable it more easily)

    Also update the documentation about overhead of timer_stats - it was
    written for the first version which had a global lock and a linear list
    walk based lookup ;-)

    Signed-off-by: Ingo Molnar
    Cc: Thomas Gleixner
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar
     

17 Feb, 2007

1 commit

  • 82f67cd9f   [PATCH] Add debugging feature /proc/timer_stat ... Browse Code »

    Add /proc/timer_stats support: debugging feature to profile timer expiration.
    Both the starting site, process/PID and the expiration function is captured.
    This allows the quick identification of timer event sources in a system.

    Sample output:

    # echo 1 > /proc/timer_stats
    # cat /proc/timer_stats
    Timer Stats Version: v0.1
    Sample period: 4.010 s
    24, 0 swapper hrtimer_stop_sched_tick (hrtimer_sched_tick)
    11, 0 swapper sk_reset_timer (tcp_delack_timer)
    6, 0 swapper hrtimer_stop_sched_tick (hrtimer_sched_tick)
    2, 1 swapper queue_delayed_work_on (delayed_work_timer_fn)
    17, 0 swapper hrtimer_restart_sched_tick (hrtimer_sched_tick)
    2, 1 swapper queue_delayed_work_on (delayed_work_timer_fn)
    4, 2050 pcscd do_nanosleep (hrtimer_wakeup)
    5, 4179 sshd sk_reset_timer (tcp_write_timer)
    4, 2248 yum-updatesd schedule_timeout (process_timeout)
    18, 0 swapper hrtimer_restart_sched_tick (hrtimer_sched_tick)
    3, 0 swapper sk_reset_timer (tcp_delack_timer)
    1, 1 swapper neigh_table_init_no_netlink (neigh_periodic_timer)
    2, 1 swapper e1000_up (e1000_watchdog)
    1, 1 init schedule_timeout (process_timeout)
    100 total events, 25.24 events/sec

    [ cleanups and hrtimers support from Thomas Gleixner ]
    [bunk@stusta.de: nr_entries can become static]
    Signed-off-by: Ingo Molnar
    Signed-off-by: Thomas Gleixner
    Cc: john stultz
    Cc: Roman Zippel
    Cc: Andi Kleen
    Signed-off-by: Adrian Bunk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar