Re: [Linux-pm-devel] Re: IBM/MontaVista Dynamic Power Management Project

Hollis Blanchard
2002-12-03T18:16:43Z

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On Tue, 2002-12-03 at 11:57, Arjan van de Ven wrote:
> On Tue, 2002-12-03 at 18:46, Bishop Brock wrote:
> > IBM and MontaVista have initiated a joint project to develop a
> > dynamic power management control and policy mechanism for Linux
> > for processors supporting dynamic voltage and frequency scaling.
> > A paper describing the proposal can be obtained from
> >
> > http://www.research.ibm.com/arl/projects/dpm.html
> >
> > A working prototype of the proposed framework for
> > the IBM PowerPC 405LP processor exists and will be made
> > public in the near future.
>
> any idea if/how this will fit into the existing cross platform cpufreq
> framework ?

It subsumes it, similar to Dominik's ideas in "[RFC] Dynamic Frequency
and Voltage Scaling Infrastructure" (on the cpufreq list). The idea is
that you want scaling events to be generated by the kernel rather than
only scaling on userland input. The paper (and Dominik's mail) give you
some ideas of when and why...

-Hollis
--
PowerPC Linux
IBM Linux Technology Center

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