Re: [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 3

[Vojtech Pavlik <vojtech@suse.cz>]

On Wed, Aug 03, 2005 at 04:23:59PM +0200, Jan De Luyck wrote:
> On Wednesday 03 August 2005 14:14, Con Kolivas wrote:
> > On Wed, 3 Aug 2005 21:54, Jan De Luyck wrote:
> > > On Wednesday 03 August 2005 07:59, Con Kolivas wrote:
> > > > This is the dynamic ticks patch for i386 as written by Tony Lindgen
> > > > <tony@atomide.com> and Tuukka Tikkanen
> > > > <tuukka.tikkanen@elektrobit.com>. Patch for 2.6.13-rc5
> > >
> > > Compiles and runs ok here.
> > >
> > > Is there actually any timer frequency that's advisable to set as maximum?
> > > (in the kernel config)
> >
> > I'd recommend 1000.
> 
> Thanks. Currently the system - under X, KDE, no artsd, bottoms at around 
> 300HZ. In total single mode with every module unloaded that I can unload it 
> stops around 22HZ.
> 
> I guess I'll have to go hunting whatever thing is causing the pollings. no 
> timertop yet, I guess? :P

i8042 runs a steady periodic 20Hz timer. You can make it slower to get
even the total low lower, and it will not affect performance under
normal (sane hardware) circumstances. 

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR