Messages in this thread | | | Date | Thu, 31 Mar 2011 11:03:45 -0400 | From | Dave Jones <> | Subject | Re: excessive kworker activity when idle. (was Re: vma corruption in today's -git) |
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On Thu, Mar 31, 2011 at 10:58:50AM -0400, Dave Jones wrote:
bah I missed a level. which seems to be the smoking gun. something in the tty layer seems to have gone nuts.
> - 17.67% kworker/0:1 [kernel.kallsyms] [k] read_hpet > - read_hpet > - 76.07% timekeeping_get_ns > - ktime_get > - 64.02% tick_dev_program_event > tick_program_event > hrtimer_interrupt > smp_apic_timer_interrupt > + apic_timer_interrupt
- 52.24% _raw_spin_unlock_irqrestore - 39.26% flush_to_ldisc process_one_work worker_thread kthread kernel_thread_helper - 32.52% __wake_up put_ldisc tty_ldisc_deref flush_to_ldisc process_one_work worker_thread kthread kernel_thread_helper - 28.22% tty_ldisc_try tty_ldisc_ref flush_to_ldisc process_one_work worker_thread kthread kernel_thread_helper - 18.80% _raw_spin_unlock_irq process_one_work worker_thread kthread kernel_thread_helper - 18.80% _raw_spin_unlock_irq process_one_work worker_thread kthread kernel_thread_helper - 5.98% process_one_work worker_thread kthread kernel_thread_helper - 4.81% lock_acquire process_one_work worker_thread kthread kernel_thread_helper - 4.70% put_ldisc tty_ldisc_deref flush_to_ldisc process_one_work worker_thread kthread kernel_thread_helper - 4.17% worker_thread kthread kernel_thread_helper - 4.17% lock_release process_one_work worker_thread kthread kernel_thread_helper - 1.28% flush_to_ldisc process_one_work worker_thread kthread kernel_thread_helper - 1.28% arch_local_irq_save - 58.33% lock_release process_one_work worker_thread kthread kernel_thread_helper - 41.67% lock_acquire process_one_work worker_thread kthread kernel_thread_helper - 0.85% tty_ldisc_deref flush_to_ldisc process_one_work worker_thread kthread kernel_thread_helper - 0.85% _raw_spin_lock_irqsave - 62.51% flush_to_ldisc process_one_work worker_thread kthread kernel_thread_helper - 37.49% tty_ldisc_try tty_ldisc_ref flush_to_ldisc process_one_work worker_thread kthread kernel_thread_helper - 0.53% tty_ldisc_ref flush_to_ldisc process_one_work worker_thread kthread
> - 35.30% sched_clock_tick > scheduler_tick > update_process_times > tick_sched_timer > __run_hrtimer > hrtimer_interrupt > smp_apic_timer_interrupt > - apic_timer_interrupt > + 65.70% _raw_spin_unlock_irqrestore > + 27.33% _raw_spin_unlock_irq > + 1.16% lock_acquire > + 1.16% put_ldisc > + 1.16% process_one_work > + 1.16% lock_release > + 0.78% worker_thread > + 0.58% _raw_spin_lock_irqsave > + 0.55% tick_sched_timer > - 23.82% do_timer > tick_do_update_jiffies64 > tick_sched_timer > __run_hrtimer > hrtimer_interrupt > smp_apic_timer_interrupt > - apic_timer_interrupt > + 63.46% _raw_spin_unlock_irqrestore > + 22.98% _raw_spin_unlock_irq > + 3.50% put_ldisc > + 3.28% lock_acquire
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