Kernel profiling and sound

Hi List,

One of my main interests is in using linuxppc for DSP/Audio related tasks.

I am on the ALSA & audio-dev lists and there has been a lot of discussion
about achieving low-latency audio I/O.

Could anyone enlighten me as to the state of this topic wrt the linuxppc
kernels?  It seems to be almost exclusively x86-related.

Specifically:

How does one profile the kernel?

Is there anyone (else) on the list who is trying to do the same kind of
thing?

Has anyone tried applying the low-latency patches (Ingo's) to *any* ppc
kernel?

does the ppc 2.4 kernel suffer from the (reported) VM issue that causes it
to exhibit *more* latency than 2.2.x kernels (this is the ststus of x86)?

I'm sure I'll have more questions soon...

TIA,
Iain.

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