[LAU] rt kernel in debian/squeeze

[Robin Gareus]

On 01/08/2011 08:06 PM, Atte André Jensen wrote:
> On 01/08/2011 03:55 PM, Robin Gareus wrote:
> 
>> It really depends on your system (CPU, mainboard, BIOS settings) but
>> the ondemand gov works/ed fine on the Indamixx-1 release (Atom CPU,
> 
> I kinda hoped we didn't have to do this...
> 
> The exact same computer running ubuntu 10.04 with rt kernel (from ubuntu
> repos) works fine with ondemand, although I can push it harder when set
> to performance. 

Probably you can push it harder because if it is a multi-core system
(and you're using jack2 or tschack): The system-load may still be too
low for a ondemand CPU governor to react while DSP load is already at
the limit, causing x-runs.

> This kernel gives xruns and audible glitches with
> ondemand even at light loads.

Thanks for the pointer. I'll look into differences of the .config
between pengutronix and ubuntu-10.4's linux-rt next week.
But it could be related to additionally applied patches as well, let's see.

> And the reason why I wrote "not really a problem" (besides the hope of
> not having to go here) is that I am perfectly aware of the potential
> problems with ondemand govenor.

I'm glad you went and came here :) Sometimes small bits of information
in slightly OT conversations reveil interesting details.

Cheers!
robin

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Robin Gareus
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