Draw lock-up

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From: Hans-Peter.Hofer++at++se.admin.ch
Date: 04/03/2000 08:36:34

Hello Performer's

My system:
Onyx2 InfiniteReality
2 RM 7
512 MB memory
IRIX 6.5.5 / Performer_eoe 2.2.6

I have a 4 channel application.
Process model: APP_CULL_DRAW
The database uses 17 1024x1024 rgb-textures for the terrain and a lot of
smaller textures
for the objects. (64 MB texture memory is filled to 93%). No cliptextures.

Now I have the following strange problem:

When I drive through the database, sometimes the frame rate drops down
dramatically
(display stand still for 1-2 sec.) When I enable the statistic at the same
time, the display
output locks up (no frame update visible, sar -g shows buffer swap/sec: 0,
gr_osview shows 100% CPU
load for the draw, but nothing happens!).
The APP and the CULL process are running on (can terminate
the application via a normal keyboard input which is handled in the APP main
loop).

Reducing the viewport size or changing the LOD scale shows no significant
improvment.
But when I reduce the texture size from 104x1024 to 512x512 this strange
effects disappears .

Does anybody know something about an effect like this?

Thanks to all.

Hans-Peter Hofer

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