DynamicClocks on R200

[Alex Deucher]

On 7/24/05, Patrick McFarland <pmcfarland at downeast.net> wrote:
> On Sunday 24 July 2005 11:21 am, Alex Deucher wrote:
> > On 7/24/05, Patrick McFarland <pmcfarland at downeast.net> wrote:
> > > I was reading the radeon manpage, and I saw DynamicClocks, and it said I
> > > could save power, but it possibly could decrease speed in some cases. So,
> > > I thought to my self, "my machine uses a lot of power as it is, so lets
> > > turn that on."
> > >
> > > Before turning it on, I ran the good ole glxgears, and it gave me
> > > consistant scores if slightly below 2000 fps. With it on, however,
> > > glxgears gives me scores consistently slightly above 2100 fps. What
> > > gives?
> >
> > tough to say.  It could be that the default clocks as the bios sets
> > them up are not quite optimal and when dynamicclocks is enabled, the
> > high end gets a little higher.  One thing to note, if you have a
> > desktop chip, dynamicclocks does nothing as the code is only executed
> > on mobility chips.
> 
> Oh. Boy.
> 
> I'm on a desktop using a desktop chip,using a Radeon 9100, lspci says:
> 
> 0000:01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R200 QM
> [Radeon 9100]
> 
> So wtf is going on? I've done the test several times, with it on, ~2100, with
> it off, ~2000. (Not that I'm actually complaining, its just that if it gives
> more people speed boosts, its worth looking at why)

it doesn't do anything though.  none of the dynamicclocks code is even
executed on desktop cards.  I suspect there is some difference in your
operating evironment.

Alex

> 
> --
> Patrick "Diablo-D3" McFarland || pmcfarland at downeast.net
> "Computer games don't affect kids; I mean if Pac-Man affected us as kids, we'd
> all be running around in darkened rooms, munching magic pills and listening to
> repetitive electronic music." -- Kristian Wilson, Nintendo, Inc, 1989
>