Re: nohz and strange sleep latencies

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To: Pavel Machek <pavel@...>
Cc: kernel list <linux-kernel@...>, <tglx@...>
Date: Tuesday, November 20, 2007 - 4:54 pm

* Pavel Machek <pavel@ucw.cz> wrote:


no, this is fine. You've got a hpet clockevents driver and two lapic 
drivers:

Clock Event Device: hpet
 set_next_event: hpet_legacy_next_event
 set_mode:       hpet_legacy_set_mode
 event_handler:  tick_handle_oneshot_broadcast

Clock Event Device: lapic
 set_next_event: lapic_next_event
 set_mode:       lapic_timer_setup
 event_handler:  hrtimer_interrupt

Clock Event Device: lapic
 set_next_event: lapic_next_event
 set_mode:       lapic_timer_setup
 event_handler:  hrtimer_interrupt

to me this has the feeling of lapic breakage in C2 mode. Does it get any 
better if you boot with 'nolapic'? (but that might in turn turn off 
high-res timers and nohz in essence) Thomas, any ideas?

	Ingo
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Messages in current thread:
nohz and strange sleep latencies, Pavel Machek, (Mon Nov 19, 4:31 pm)
Re: nohz and strange sleep latencies, Thomas Gleixner, (Tue Nov 20, 5:44 am)
Re: nohz and strange sleep latencies, Ingo Molnar, (Mon Nov 19, 4:55 pm)
Re: nohz and strange sleep latencies, Pavel Machek, (Mon Nov 19, 5:11 pm)
Re: nohz and strange sleep latencies, Ingo Molnar, (Tue Nov 20, 4:57 am)
Re: nohz and strange sleep latencies, Pavel Machek, (Tue Nov 20, 6:54 am)
Re: nohz and strange sleep latencies, Ingo Molnar, (Tue Nov 20, 4:54 pm)
Re: nohz and strange sleep latencies, Thomas Gleixner, (Tue Nov 20, 6:48 pm)
Re: nohz and strange sleep latencies, Ingo Molnar, (Tue Nov 20, 6:52 pm)
Re: nohz and strange sleep latencies, Pavel Machek, (Thu Nov 22, 2:52 pm)
Re: nohz and strange sleep latencies, Thomas Gleixner, (Thu Nov 22, 4:29 pm)
Re: nohz and strange sleep latencies, Pavel Machek, (Mon Nov 26, 7:54 am)
[patch] Re: nohz and strange sleep latencies, Pavel Machek, (Sun Nov 25, 4:25 pm)
Re: [patch] Re: nohz and strange sleep latencies, Thomas Gleixner, (Sun Nov 25, 5:42 pm)
Re: nohz and strange sleep latencies, Pavel Machek, (Sat Nov 24, 6:40 pm)
Re: nohz and strange sleep latencies, Rafael J. Wysocki, (Sat Nov 24, 7:29 pm)
Re: nohz and strange sleep latencies, Thomas Gleixner, (Sun Nov 25, 5:51 pm)
Re: nohz and strange sleep latencies, Rafael J. Wysocki, (Sat Nov 24, 7:35 pm)
Re: nohz and strange sleep latencies, Pavel Machek, (Sat Nov 24, 6:29 pm)
Re: nohz and strange sleep latencies, Pavel Machek, (Fri Nov 23, 8:22 am)
Re: nohz and strange sleep latencies, Pavel Machek, (Thu Nov 22, 2:51 pm)
Re: nohz and strange sleep latencies, Pavel Machek, (Thu Nov 22, 6:09 am)
Re: nohz and strange sleep latencies, Ingo Molnar, (Tue Nov 20, 5:05 am)