Steve Baker (sbaker++at++link.com)
Tue, 29 Sep 1998 15:58:31 -0500 (CDT)
> HELP!
>
> We have a 3pipe, 16 processor Onyx R10000 with IR graphics.
> Unfortunately, no matter what we do, we cannot seem to avoid
> periodic graphics glitches (unable to meet frame rate) even
> with VERY simple scenes.
>
> I cannot even run (as root)
> perfly -C -L -M0 -m6 -N -P1 -r60 esprit.flt
> without missing frames. It seems to miss every second or so. The
> problem isn't there all the time, but if you spin the model and wait
> a minute, you will see this periodic glitch about 1/2 the time.
>
> We have SGI software and hardware support, but the Systems Support Engineer
> and the phone support have not been able to figure out the problem. They
> swapped every board and even sent a new systme disk configured at Mt View.
>
> Any Ideas???
Here are a few:
* Are all three pipes genlocked?
* Have you disabled everything you don't need using chkconfig (stuff like
mediad has screwed me up on occasions) ?
* Are all your processes tied to processors and are those processors
isolated/restricted/etc?
* Have you rerouted interrupts to an un-needed CPU and disabled 'sprayed
interrupts'?
* Do you have any heavyweight processes running on CPU 0 ? (DONT!)
* Try to avoid checking X events within your Performer processes (ie
don't read the keyboard or mouse in APP/CULL/DRAW).
...there are probably others. I'd hope that your Systems Support
Engineer had covered most of these already.
Steve Baker (817)619-2657 (Vox/Vox-Mail)
Raytheon Systems Inc. (817)619-2466 (Fax)
Work: SBaker++at++link.com http://www.hti.com
Home: SJBaker1++at++airmail.net http://web2.airmail.net/sjbaker1
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