Dan Malek wrote: >> So my question is, is there some minor detail that my >> FPU-state-save/restore >> code is missing, that would cause these sort of symptoms? > >Just get all of this out of the kernel. If you used the standard ALSA >drivers and framework, lots of mixing features are available to you. >If you need some custom mixing, just write a plug-in to do it. >Your data rates are so low they don't justify making any hacks >like this.
.. or if you *do* need hard-realtime feedback, you may consider using Xenomai[1] (formerly known as RTAI/Fusion) instead of a hack of the interrupt handler. Thanks to this nice project, FPU on PQ2 works fine in kernel-land, and if need be, it will let you move to user-land seamlessly while keeping the constraints. Feel free to join the xenomai-help mailing list to get more help on specific questions. Disclaimer: I'm not affiliated with Xenomai, I am just a happy user :-) [1] http://xenomai.org Regards, -- Stephane
