Single-processor, fixing frame rate

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Eric S. Hirschorn (erich++at++pike.cecer.army.mil)
Thu, 27 Apr 1995 23:23:06 -0500 (CDT)

We're trying to get a Performer 1.2 application to stop doing a "free
run" on a single processor Crimson (IRIX 5.2), but without success.
The code we're testing is a modified perfly. Our method of testing is
to set up pfSync or pfVClockSync so as to make the simulation run at 1
Hz, so it should appear to run really slow.

We've tried using pfSync with pfPhase(PFPHASE_LOCK),
pfPhase(PFPHASE_LIMIT), and setting the pfFrameRate. Also, we have
tried pfVClockSync.

Do all of the Performer real-time synchronization routines assume a
multiprocessor machine?

Or should we be falling back on IRIX Real-time features such as
interval timers, signals, and so forth?

Eric
erich++at++pike.cecer.army.mil

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