Patch 3229 and Synchronisation of Pipes

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RUS (Daniela.Rainer++at++rus.uni-stuttgart.de)
Tue, 20 Jul 1999 18:51:44 +0000

Hi,

recently we upgraded from Performer 2.2 to 2.2.2 by installing patch 3229.

We use 2 pipes of our IR to drive a CAVE.
We tested 3 methods of pipe synchronisation in Performer (in all cases the
genlock cable and swap ready cable is connected, although method 1 doesn't
require swap ready from my understanding):

1. share PFCHAN_SWAPBUFFERS and attach left channel 1, 2, 3 to left channel 0
   and right channel 1, 2, 3 to right channel 0

2. share PFCHAN_SWAPBUFFERS_HW and attach channel 1, 2, 3 to channel 0

3. pwin->attachSwapGroup attach pwin 1, 2, 3 to pwin 0

In Performer 2.2 method 1 worked well.

With the upgrade it doesn't synchronise any more.
Method 2 and 3 work but produce warnings in the syslog
"WARNING: IR2: Pipe hung: no TBUS or ARM activity" and "WARNING: IR2:
swapbuffer timeout (rnp=0xc000000001425818)" but don't cause problems.

Our configuration:

- Onyx2 14 CPUs
- 3 x IR2 , 2 pipes used for the CAVE
- IRIX 6.4

Thanks for any help!

Best Regards
Daniela

-- 
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Daniela Rainer                       | email: rainer++at++hlrs.de
Rechenzentrum Uni Stuttgart (RUS)    | http://www.hlrs.de/people/rainer/
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