On Tue, Feb 16, 2010 at 04:46:31AM +0000, Ben Hutchings wrote: > On Sat, 2010-02-06 at 09:31 +0000, Tom Parker wrote: > > On 2 February 2010 21:16, maximilian attems <[email protected]> wrote: > > > Squeeze will release with 2.6.32 can anyone of you still > > > reproduce this? > > > > > > also please make sure to use latest powertop, aka > > > ii powertop 1.13~pre201001 Linux tool to find out what is using > > > power > > > > palf...@drone:[~] dpkg -l |grep powertop > > ii powertop 1.13~pre20100125-1 > > Linux tool to find out what is using power > > o > > palf...@drone:[~] uname -a > > Linux drone 2.6.32-1-686 #1 SMP Mon Feb 1 01:37:26 UTC 2010 i686 GNU/Linux > > > > Attached is powertop.log ('powertop -d') and top.log('top -b -n 1') > > > > As you can see, the major wakeup is still "Load balancing tick", which > > I'm guessing is a translated name for hrtimer_start_expires? I think > > the ACPI estimate of 1.1W is a little off though... > > hrtimer_start_expires() is a generic function in the kernel to schedule > a wakeup by the high-resolution timer. In 2.6.32 it is an inline > function that calls hrtimer_start_range_ns(). Powertop recognises and > relabels some specific calling sequences, including this one. > > If I understand correctly, these are scheduler ticks that periodically > interrupt the running task (preemption). However, on a kernel compiled > with the NOHZ option (as Debian's kernel images are) this should never > wake the system up - scheduler ticks are disabled when there are no > tasks ready to run and no other timers due to expire before the next > tick. > > I can only suggest you report this upstream at > <http://bugzilla.kernel.org>. Use product 'Process Management', > component 'Scheduler'. Let us know the bug number so we can track it.
Did you report this at http://bugzilla.kernel.org ? Cheers, Moritz -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
