[LAU] Balance between performance and noise

[Fernando Lopez-Lezcano]

On 12/09/2010 12:10 PM, Robin Gareus wrote:
> On 12/09/2010 06:39 PM, rosea.grammostola wrote:
>> On 12/09/2010 06:35 PM, Robin Gareus wrote:
>>> On 11/27/10 13:11, Arnold Krille wrote:
>>>
>>>> Set ther cpu-governor to performance (so it doesn't switch
>>>> frequencies which
>>>> produces xruns) but reduce the maximum allowed frequency.
>>>>
>>> what kernel are you running?
>>>
>>
>>>    2.6.33.7-rt29
>>>
>>
>> That one ^
>>
>> You tested it with yoshimi, hammond or other heavy patches? Foo-yc20 ?
>
> different toolset here, but I can go from naught to 16 jconvolvers,
> csound, fluidsynth, ardour&  jamin in a few seconds. causing the CPU
> usage to jump up and change freq w/o x-runs.
>
> ..what does cause problems here is FSBus frequency scaling, I've
> disabled that in the BIOS.

Turns out that there are two parameters in my laptop's BIOS (Lenovo 
T510) that can disable both pci and pci express power management.

I'll be darned! Guess what? The xruns are gone! Like magic!! Just on a 
preliminary test (I don't have all the hardware I would need here) but 
running with the "Ondemand" governor.

This is a _golden_ tip. Thanks much!

-- Fernando