On Thu, Dec 14, 2006 at 04:01:58PM +0300, Vitaly Wool wrote: > On 12/14/06, Dave Jones <davej at redhat.com> wrote: > > > > > > But what sense does it make for a user,sysadmin or application > > to change voltage? If any of these want to save power, they do so > > by a) doing less work, and then b) lowering the clock speed as this > > is inherently tied to voltage. > > > > It makes sense to perform changing an operating point dynamically in > userland. An operating point does not have to revolve around the voltage, nor should it. Fill out the following. * A sysadmin wants to set the CPU voltage to 1.5V because _________________ * A user wants to set the CPU voltage to 1.5V because _________________ * An application wants to dynamically set the voltage rather than the frequency because ______________________ > That said, voltage should be accessible from userland. Try again. It's completely the wrong knob to be turning. Dave -- http://www.codemonkey.org.uk
