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From: javier Martin <javier.martin@vista-silicon.com>
To: Jarkko Nikula <jarkko.nikula@bitmer.com>
Cc: Kevin Hilman <khilman@ti.com>,
	linux-omap@vger.kernel.org, Koen Kooi <koen@beagleboard.org>
Subject: Re: cpuidle status in mainline for Beagleboard xM
Date: Fri, 2 Sep 2011 09:23:52 +0200	[thread overview]
Message-ID: <CACKLOr1h23n-dSCZ6Dqzo_EW_6fyieZodCKfXFmn7i2tL=hQCQ@mail.gmail.com> (raw)
In-Reply-To: <4E607241.8000704@bitmer.com>

On 2 September 2011 08:05, Jarkko Nikula <jarkko.nikula@bitmer.com> 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

  reply	other threads:[~2011-09-02  7:23 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-01 14:14 cpuidle status in mainline for Beagleboard xM javier Martin
2011-09-01 15:10 ` Kevin Hilman
2011-09-01 15:33   ` javier Martin
2011-09-01 17:46     ` Kevin Hilman
2011-09-02  6:05       ` Jarkko Nikula
2011-09-02  7:23         ` javier Martin [this message]
2011-09-02 17:14           ` Kevin Hilman
2011-09-05  8:04             ` javier Martin
2011-09-06 21:04               ` Kevin Hilman

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