From: Dave Jones <davej@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Tejun Heo <tj@kernel.org>
Subject: Re: excessive kworker activity when idle. (was Re: vma corruption in today's -git)
Date: Thu, 31 Mar 2011 11:03:45 -0400 [thread overview]
Message-ID: <20110331150344.GB10163@redhat.com> (raw)
In-Reply-To: <20110331145850.GA10163@redhat.com>
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
next prev parent reply other threads:[~2011-03-31 15:04 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-29 4:09 vma corruption in today's -git Dave Jones
2011-03-29 4:19 ` Américo Wang
2011-03-29 4:26 ` Dave Jones
2011-03-29 4:22 ` Linus Torvalds
2011-03-31 3:09 ` excessive kworker activity when idle. (was Re: vma corruption in today's -git) Dave Jones
2011-03-31 3:34 ` Dave Jones
2011-03-31 3:44 ` Linus Torvalds
2011-03-31 4:08 ` Dave Jones
2011-03-31 15:53 ` Linus Torvalds
2011-03-31 16:21 ` Linus Torvalds
2011-03-31 21:38 ` Linus Torvalds
2011-03-31 14:59 ` Paul E. McKenney
2011-03-31 3:37 ` Linus Torvalds
2011-03-31 3:55 ` Dave Jones
2011-03-31 5:32 ` Linus Torvalds
2011-03-31 14:21 ` Arnaldo Carvalho de Melo
2011-03-31 14:58 ` Dave Jones
2011-03-31 15:03 ` Dave Jones [this message]
2011-03-31 15:09 ` Dave Jones
2011-03-31 15:45 ` Linus Torvalds
2011-03-31 15:25 ` Linus Torvalds
2011-03-31 15:49 ` Dave Jones
2011-03-31 15:58 ` Linus Torvalds
2011-03-31 16:13 ` Dave Jones
2011-03-31 6:56 ` Tejun Heo
2011-03-31 10:37 ` [PATCH] workqueue: document debugging tricks Florian Mickler
2011-03-31 11:41 ` Tejun Heo
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