Re: SMP cpu deep sleep

[Jeff Sipek]

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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.

- -- 
"If I have trouble installing Linux, something is wrong. Very wrong."
  - Linus Torvalds
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