Summary:
A patch to reduce audio skipping and X jerking under load.

It's looking seriously like I'm talking to myelf here, but just in case there 
are lurkers testing this patch, there's a big bug that made it think jiffy 
wraparound was occurring so interactive tasks weren't receiving the boost 
they deserved. Here is a patch with the fix in. 

How to use if you're still thinking of testing:
Use with Hz 1000, and use the granularity patch I posted as well for smoothing 
X off. 

Con