Strange wakeups count

[Len Brown]

On Friday 28 March 2008, Arjan van de Ven wrote:
> Bruce Duncan wrote:
> > (Please cc me in replies)
> > 
> > Hi all,
> > 
> > Any ideas why I get such a ridiculously high number of wakeups per second that 
> > I can't account for?
> 
> if this is a recent 2.6.25 kernel, this is a known bug (my own PC shows it);
> Venki fixed this on Monday so hopefully the fix will make it into 2.6.25

It went upstream today, so it should be included in linux-2.6.25-rc7-git3
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8e92b6605da989c0aa8ff7e33306f36f0efd957c

cheers,
-Len

> > 
> > Also, why aren't tick_sched_timer's wakeups included in the powertop output? 
> 
> those aren't actual wakups, they're the mechanism for which real wakeups are done.
> PowerTOP deliberately doesn't show these because
> 1) they're not real wakeups
> 2) because of that, showing them anyway would only be confusing for no reason
> 
> If you have actual timer interrupts that happen, PowerTOP does report those separately.
> (as "Extra timer interrupt".. there've been a lot of questions about these before)
> 
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