Re: Processor Selection

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Jim Helman (jimh++at++surreal)
Sat, 20 Nov 93 12:54:59 -0800


re: 2 pipes on 4 CPUs.

The appropriage Performer multiprocessing mode depends on how APP,
CULL or DRAW intensive your application is. And whether you need
absolute realtime behavior (Unix out of your hair).

If neither the APP or CULL is too long, but the DRAW is heavy, you
might run PFMP_APP_CULL_DRAW, get 5 processes (APP + CULL1 + CULL2
+ DRAW1 + DRAW2) for your 2 pipes and have the Unix + CULL1 share
a processor and have APP + CULL2 share another with each DRAW
taking one of the remaining two.

If your APP is heavy, but CULL or DRAW isn't you could run
PFAPP_CULLDRAW, get 3 processes (APP + CULLDRAW1 + CULLDRAW2).
Then you can lock everything down and still have one for Unix.

Performer 1.2 has a cull direct mode which should be faster than
the sequential CULLDRAW in the last example.

rgds,

-jim helman

jimh++at++surreal.asd.sgi.com
415/390-1151


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