Re: [RFD] Automatic suspend

[Matthew Garrett]

On Tue, Feb 17, 2009 at 06:14:34AM -0800, Brian Swetland wrote:
> [Matthew Garrett <mjg59@xxxxxxxxxxxxx>]
> > https://lists.linux-foundation.org/pipermail/linux-pm/2009-January/019493.html 
> > says that they're the same on their current platform.
> 
> Well on the Qualcomm MSM72xx SoCs, yeah they're pretty similar -- we can
> reasonably enter power collapse (full shutdown of the ARM11 and
> peripherals) from idle.  But this is not (to my knowledge) true of *all*
> SoCs out there.  Also, resuming from this state can take 5-30ms
> (depending on how distracted the baseband processor is by what's going
> on on the network).

Mm. Resume from deep idle on x86 is typically in the usec range, but 
this is the kind of constraint that pm_qos exposes nicely.

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
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