RE: [info-performer] PERFORmance on 9700?

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From: Braun, Tom (tom.braun++at++lmco.com)
Date: 02/19/2003 05:54:22

Hello Peter and Performer users,

I saw your email about the Radeon 9700 posted to the Performer mailing list.
I have not yet specifically seen the problem that you are referring to.

I was wondering if you wouldn't mind comparing notes with me. I also have a
Radeon 9700 Pro. I was wondering if you might be experiencing some of the
same problems that I am. I see Z-Buffer fighting in places on my terrain
that do not occur on other video cards. My video card manufacturer happens
to be Hercules. The Hercules driver allow you to choose "Force Z-Buffer
Depth" of Disabled, 16 bit, or 24 bit. With "Force Z-buffer depth" set to
"Disabled" or "Force 24-bit" I get really fast rendering speeds but Z depth
is incorrectly calculated to give me flashing polygons or no polygons at all
(depending on the application). "Force Z-buffer depth" of "Force 16-bit'
gives me exceedingly slow scene rendering rates on the order of 1 or 2 Hz
and texture swim which appears to be mapped at the correct size (not zoomed
in so that one pixel covers 300 feet of ground).

-----Original Message-----
From: Blomqvist Peter [mailto:peter.blomqvist++at++volvo.com]
Sent: Wednesday, February 19, 2003 5:05 AM
To: info-performer
Subject: [info-performer] PERFORmance on 9700?

Hi all,

I have this annoying behaviour of PF 3.0 on my Radeon 9700 card running
under RH 8.0:
occasionally, frames are dropped, seemingly for no reason.
(There are no obvios "hotspots" in the database that should cause load
problems
 and the dropped frames seems to be dropped more or less randomly).

When digging deeper into this, i discovered that Perfly also reports dropped
frames, even when run without arguments(!)
(No arguments and "DFT" statistics).

Anyone got any clues to this?

BR
/Peter

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