On Feb 8, 2004, at 10:04 AM, sr ferenczy wrote: >> Does the VT cluster run Mac OS X -- and is it really relevant to our >> issue? >> >> f > > yes it does, and yes, i believe it is highly relevant. it is the > largest working example of SMP we have on the macintosh, and i believe > it shows how well the OS handles SMP. The VT cluster is not an SMP machine, and OS X isn't directly responsible for it's process scheduling. It is a relevant case for parallelism in general, and the Apple hardware has some advantageous properties that are being exploited in this system, but in this case the OS has less to do with performance than you might think.