Re: userspace not supported for longrun?

[Bruno Ducrot <ducrot@poupinou.org>]

On Wed, Jun 02, 2004 at 02:19:17PM +0200, Dominik Brodowski wrote:
> On Tue, Jun 01, 2004 at 07:52:05PM -0400, Wayne Wylupski wrote:
> > Thank you.  The issue is that Fedora Core 2 ships with 'cpuspeed' as a
> > service, which fails on machines with Crusoe chips because it assumes
> > there's a userspace governor without first checking whether there it is
> > available.
> > 
> > Would it really violate patents if the userspace governor were allowed
> > to work along the existing policies ("powersave" and "performance")?
> 
> No, that's a purely technical issue: The Crusoe chip can only be set to a
> _frequency range_, and the chip itself (actually, the Code Morphing
> Software) decides which actual frequency is best for the current workload.

You can run a crusoe chip on a fixed frequency.

Some people also think that on some situation, the longrun will consume
more power than their algorithm (search for "vertigo OSDI2002", I don't
remmeber the exact link) for an example.

Of course the userspace stuff is completely useless anyway.

Cheers,

-- 
Bruno Ducrot

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.