Re: [RFC][PATCH] Runtime switching of the idle function [take 2]

On Tue, 2005-11-29 at 15:50 +0100, Andi Kleen wrote:
> On Tue, Nov 29, 2005 at 09:19:31AM -0500, Steven Rostedt wrote:
> > > And in practice the CPU will run so hot that only benchmarkers like it.
> > 
> > Why would it run hot?  What's the difference between polling and doing
> > other things.  How many transistors does it take to poll?
> 
> It will prevent the CPU from going into sleep states and essentially
> keep most of it enabled.  

Well, there's one thing that my patch _does_ help with.  (And it has
just helped me now).  If you boot up with idle=poll and forget about it,
you can check what idle routine is being used and switch out of poll
without rebooting. (like I'm doing right now :-)

-- Steve

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---

• References:
  • Re: 2.6.14-rt13
    • From: Ingo Molnar <[email protected]>
  • [RFC][PATCH] Runtime switching to idle_poll (was: Re: 2.6.14-rt13)
    • From: Steven Rostedt <[email protected]>
  • Re: [RFC][PATCH] Runtime switching to idle_poll (was: Re: 2.6.14-rt13)
    • From: Ingo Molnar <[email protected]>
  • [RFC][PATCH] Runtime switching of the idle function [take 2]
    • From: Steven Rostedt <[email protected]>
  • Re: [RFC][PATCH] Runtime switching of the idle function [take 2]
    • From: Andrew Morton <[email protected]>
  • Re: [RFC][PATCH] Runtime switching of the idle function [take 2]
    • From: Steven Rostedt <[email protected]>
  • Re: [RFC][PATCH] Runtime switching of the idle function [take 2]
    • From: Andrew Morton <[email protected]>
  • Re: [RFC][PATCH] Runtime switching of the idle function [take 2]
    • From: Ingo Molnar <[email protected]>
  • Re: [RFC][PATCH] Runtime switching of the idle function [take 2]
    • From: Andi Kleen <[email protected]>
  • Re: [RFC][PATCH] Runtime switching of the idle function [take 2]
    • From: Steven Rostedt <[email protected]>
  • Re: [RFC][PATCH] Runtime switching of the idle function [take 2]
    • From: Andi Kleen <[email protected]>

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