pfDispList and parallel drawing (bug?)

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Andreas Loesch (loesch++at++leonardo.gsf.de)
Thu, 13 Mar 1997 17:57:35 +0100

Hi Performers,

we are in a situation where we want to get two pfDispList with identical
contents drawn by two parallel processes (multipipe configuration). We are
sure that we get everything we need packed in our pfDispLists, but when we
try to pfDispList::draw() them in parallel we get awful flickering, wrong
colors, positions ...
Obviously the two processes are competing for pfState changes!?

Everything works fine when we omit the parallel drawing either by ignoring
one of them (nothing gets draw in this channel) or by making sure that they
are drawn one after the other (using locks).

All together it looks like pfDispLists are not designed for parallel. Is this
true or a bug and if so will it be fixed in future releases? Here is our
configuration:

12 R4400 200MHz Onyx
2 iR pipes with 2 RM6 each
Iris 6.2
Performer 2.1

Please, could someone shed some light on this, we ran out of ideas...

Thanks and happy performing

Andi

-- 
Andreas Lösch		GSF - Forschungszentrum für Umwelt und Gesundheit
MEDIS/M3				Phone   : (+49 89) 3187 4458
Ingolstädter Landstr. 1			FAX     : (+49 89) 3187 4243 o. 3326
85764 Neuherberg / GERMANY		E-mail  : loesch++at++gsf.de





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