Messages in this thread |  | | Date | Fri, 20 Aug 2004 04:58:29 -0400 | From | Jeff Sipek <> | Subject | Re: SMP cpu deep sleep |
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On Friday 20 August 2004 04:06, Hans Kristian Rosbach wrote: > While reading through hotplug and speedstep patches > I came to think of a feature I think might be useful. > > In an SMP system there are several cpus, this generates > extra heat and power consuption even on idle load. > Is there a way to put all cpus but cpu1 into a kind of > deep sleep? Cpu1 would have to do all work (including irqs) > of course.
With Rusty's Hotplug CPU, a userspace script should be able to do this by cat'ing 1 or 0 into the appropriate sysfs file.
Jeff.
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