oprofile and ARM A9 hardware counter

Will Deacon will.deacon at arm.com
Thu Apr 26 14:07:19 EDT 2012


On Wed, Apr 04, 2012 at 12:15:24PM +0100, Will Deacon wrote:
> On Wed, Apr 04, 2012 at 12:29:49AM +0100, Paul Walmsley wrote:
> > 
> > Part of the problem is that the clockdomain data for the emu_sys 
> > clockdomain is wrong.  Here's something to try to fix it.  It might just 
> > be enough to get it to work.
> 
> Hmm, doesn't seem to work but I do see the following in dmesg when I try to
> use perf:
> 
>  powerdomain: waited too long for powerdomain emu_pwrdm to complete transition
> 
> which is new with your patch.

Sorry to nag, but does anybody have a clue where to go from here? I can
start digging in the OMAP PM code, but it's all new territory for me.

Cheers,

Will



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