Re: PM related performance degradation on OMAP3

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Hi,

On Thu, Apr 12, 2012 at 09:57:32AM -0700, Kevin Hilman wrote:
> +Felipe for EHCI question
> 
> Gary Thomas <gary@xxxxxxxxxxxx> writes:
> 
> [...]
> 
> > This worked a treat, thanks.  My network performance is better
> > now, but still not what it was.  The same TFTP transfer now takes
> > 71 seconds, so about 50% slower than on the 3.0 kernel.  Applying the
> > second [unnamed] patch (arch/arm/mach-omap2/cpuidle34xx.c) made no difference.
> 
> And does a CONFIG_PM=n kernel get you back to your v3.0 performance?
> 
> > I am interested in having PM working as I'm designing a battery powered
> > portable unit, so I need to keep pursuing this.
> 
> So do I. :)

we all are :-p

> > Note: I noticed that when I built with CONFIG_PM off and no other
> > changes, my EHCI USB didn't work properly.  Should this be the case?
> 
> Probably not, but haven't tested EHCI USB.  I've Cc'd Felipe to see if
> he has any ideas why EHCI wouldn't work with CONFIG_PM=n.

Govind, Keshava... can you look into this at some point next week ? Or
maybe give us a good reason why it doesn't work without PM ;-)

-- 
balbi

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