Re: cpuidle status in mainline for Beagleboard xM

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On 2 September 2011 08:05, Jarkko Nikula <jarkko.nikula@xxxxxxxxxx> wrote:
> Other usual things to check that display is off (echo 1 >
> /sys/class/graphics/fb0/blank) and no cable to musb/otg port.
>
> Haven't tried myself with recent kernel but does EHCI and hub on XM let to
> idle cpu at all? At least on one board having on-board hub I had to disable
> or unload ehci module in order to hit the retention.
>

I've checked that too and I've even disabled USB support in the kernel
just to be sure. But still nothing:

root@beagleboard:~# powertop -d -t 100
PowerTOP 1.12   (C) 2007, 2008 Intel Corporation

Collecting data for 100 seconds


Cn                Avg residency
C0 (cpu running)        ( 0.0%)
C0               58.5ms (100.0%)
C1                0.0ms ( 0.0%)
C2                0.0ms ( 0.0%)
C3                0.0ms ( 0.0%)
C4                0.0ms ( 0.0%)
C5                0.0ms ( 0.0%)
C6                0.0ms ( 0.0%)

Even when CPU has been idle 100% of the time it doesn't hit any state
deeper than C0.


-- 
Javier Martin
Vista Silicon S.L.
CDTUC - FASE C - Oficina S-345
Avda de los Castros s/n
39005- Santander. Cantabria. Spain
+34 942 25 32 60
www.vista-silicon.com
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