Re: problems with pfFrame and pfSync on multipipe

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From: Yair Kurzion (yair++at++polygon.engr.sgi.com)
Date: 08/31/2000 11:36:25

Hi Eylon !

How many DCS nodes do you update every frame ?
What Performer version are you running ?

Thanks,
-yair

>
> Hi everybody
>
> Our system has 8 performer processes (APP + 3xDRAW + 3xCULL + COMPUTE),
> running on a 3 pipes and 10 cpu's (each process runs on it's own locked
> cpu).
> The basic stages are :
> call pfFrame;
> update dcs's;
> call pfSync;
>
> The problem is that when the scene become complicated (a lot of dcs's)
> the time it takes pfFrame to finish become extremely large and pfSync
> misses the next frame.
> I checked the time it takes each stage on a complicated scene and i got:
> pfFrame - 16 msec
> update dcs's - 29 msec
> pfSync - 55 msec
> so we miss a frame and we are running 10 HZ instead of 20 HZ
>
> The question is Why does pfFrame take so much time and is that what
> cause pfSync to miss the next frame?
>
>
> Greetings
>
> Eylon
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