Re: [patch] i386 dynamic ticks 2.6.13-rc4 (code reordered)

Con Kolivas
2005-08-02T10:54:45Z

On Tue, 2 Aug 2005 18:15, Tony Lindgren wrote:
> * Con Kolivas <kernel@kolivas.org> [050802 00:36]:
> > On Tue, 2 Aug 2005 05:17 pm, Tony Lindgren wrote:
> > > But this you can verify by booting to single user mode and then running
> > > pmstats 5, and if ticks is not below 25HZ, there's something in the
> > > kernel polling.
> >
> > I'm removing modules and they don't seem to do anything so I'm not sure
> > what else to try.
>
> If you have 130HZ in single user mode, it's some kernel driver.
> You could printk the the next timer, then grep for that in System.map:

I kept pulling modules and eventually got to 27Hz so something was definitely
happening.

I need to ask you why you think limiting the maximum Hz is a bad idea? On a
laptop, say we have set the powersave governor, we have already told the
kernel we are interested in maximising power saving at the expense of
performance. Would it not be appropriate for this to be linked in a way that
sets maximum Hz to some value that maximises power save (whatever that value
is) at that time?

Cheers,
Con