* Con Kolivas <[email protected]> [050802 03:54]:
> On Tue, 2 Aug 2005 18:15, Tony Lindgren wrote:
> > * Con Kolivas <[email protected]> [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.
Cool.
> 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?
With dyntick the system will run at max HZ only when busy. It is possible
that cutting down max HZ might cause some savings while busy, but I would
assume the savings are minimal.
I personally prefer to have the performance available when needed, and
max savings while idle.
Tony
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |