Messages in this thread | | | Date | Tue, 17 Feb 2009 16:45:47 -0800 | From | mark gross <> | Subject | Re: [RFD] Automatic suspend |
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On Mon, Feb 16, 2009 at 11:23:30PM +0000, Matthew Garrett wrote: > On Tue, Feb 17, 2009 at 12:19:38AM +0100, Rafael J. Wysocki wrote: > > > This, again, seems to be a bit x86-centric. :-) The Android people are telling > > us that on the hardware they deal with it does make sense to put the entire > > system to sleep even for relatively short periods of time, since the latencies > > involved are not too bad. > > Arve said that the power state was equivalent in idle and suspend, but > that they preferred suspend because it stopped any periodic timers. I'd > be more interested in making sure that unnecessary timers aren't running > than focusing on automatically entering system-wide suspend - Nokia have > been managing this since 2005 with good results. >
I think they where talking timers as hardware devices pulling electrons, not SW timers triggering wake ups. I guess the timer hardware could be running, and pulling power, even when not programmed to trigger any event or IRQ.
--mgross
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