[PD] pd and cpu frequency scaling

[Roman Haefeli]

hi all

i noticed, that the cpu frequency scaling doesn't react on cpu load
caused by pd. even if i have a constant high load - for instance when
running several hundred [osc~]s - the cpu frequency stays at the lowest
value of 800 MHz. i need to run another program, such as 'yes' or
'burnMMX' in order to trigger the scaling to set the frequency to the
maximum of 2401000 MHz. 
so far i only noticed this behaviour with pd. other programs don't seem
to 'fool' frequency scaling. 

specs:
pd 0.41.4 running in -rt -jack mode
2.6.24-21-rt (from ubuntu hardy)
Intel Core 2 Duo CPU T8300 @ 2.40GHz
scaling_governor: on_demand (default)

i know, that it is most likely not a direct pd problem, but probably
some other pd-linux users encountered a similar behaviour. as a
workaround, i currently manually switch the scaling_governor to
'performance', when i am in a 'performative' situation. i wonder, if
there is a real fix for that problem.

roman



		
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