Messages in this thread | | | Subject | Re: sched: deep power-saving states | From | Peter Zijlstra <> | Date | Wed, 22 Oct 2008 22:05:25 +0200 |
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On Wed, 2008-10-22 at 12:55 -0700, Arjan van de Ven wrote: > On Wed, 22 Oct 2008 21:49:52 +0200 > Peter Zijlstra <peterz@infradead.org> wrote: > > > > This still leaves us with the worst case IRQ response as given by the > > deepest C state. Which might be un-desirable. > > that's a different problem in a different problem space.
Ah right, so the only point was trying to wake shallow cpus so as to try and let deep cpus idle longer?
> > jcm was, once upon a time, working on dynamically changing the idle > > routine, so that people who care about wakeup latency can run > > idle=poll while their application runs, and the acpi C state stuff > > when nobody cares. > > > > This could of course then be tied into the PM QoS stuff Mark has been > > doing. > > in fact you already have this *exactly* today; this isn't future > technology.
Interesting, what knob do I turn to get idle=poll dynamically?
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