Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!agate!eos!phil
From: phil@eos.UUCP (Phil Stone)
Newsgroups: comp.sys.next
Subject: Real Time and Mach
Message-ID: <2897@eos.UUCP>
Date: 14 Mar 89 22:50:36 GMT
Reply-To: phil@eos.UUCP (Phil Stone)
Organization: NASA Ames Research Center, Calif.
Lines: 15

Thanks for the info on sampling rates and the NeXT, everybody.  As I
thought, the maximum stand-alone sampling rate is 44.1 Khz.  Ali Ozer
mentioned a company that has announced an add-on that will allow
88.2 Khz in monoaural.  I will look into this for details.

Next area of concern:  how is Mach for real-time applications?  Have
any of the HP-style kernal-preemption hacks been added?  What's the
scheduling like (timer granularity, signal implementation, etc)?
Note that I only know enough about this stuff to get me into trouble,
but even on so-called Real-Time Unix (tm) on the MassComp, several
shortcomings have appeared in our experiments.  I need to know if things
will be better or worse with Mach.

	Thanks,
		Phil Stone	 (phil@eos.arc.nasa.gov / ames!eos!phil)