I received only one reply that suggested to
set the DISPLAY again. This didn't help in
my case. So I am still stuck. If anyone could
point me to where I could find help or
further information, it would be very much
appreciated.
Christian
Original message follows:
I am facing a strange problem with graphics performance.
My hardware/software setup:
DU 4.0d, Open3D 4.7/4.8(tried both)
LX board 533 Mhz, 256Mb Ram, 512 Mb swap,ZLXp-L2
graphics adapter, non-DEC 19" monitor (ELSA Ecomo,
very good multisync)
I started with a benchmark from our postprocessing
software EnSight which uses OpenGL calls. The benchmark
is rotating a wireframe model (-> lines) and the
same model with shaded surfaces (->polygons). The first
time it yielded only 120k lines/sec and 40k polys/sec which
is comparable to a 200Mhz Pentium Pro with S3 Virge
card on NT4.0 (that should not offer any hardware accel I
think). During the benchmark Xdec only gets 4-8% of
the cpu time, the rest of the machine is idle. However
if I turn the window into an icon or switch workspace,
Xdec gets almost 100% cpu time to give 2200k lines/sec and
680k polys/sec. The difference in the performance pretty
well scales with the amount of cpu percentage Xdec gets.
I talked to the guys at EnSight support and they didn't
know a solution, either. The assumed that I don't get
hardware support in the first case.
Similar things acually happen with programs that continously
calculate data and plot on the screen (simple x-y line data)
(via Xlib). It appears to me that there is a serious
misconfiguration. I did gl_ivp which gives no error message.
--
Christian Hasse
Institut fuer Technische Mechanik
RWTH Aachen
http://www.itm.rwth-aachen.de/staff/hasse/Christian.Hasse.html
Received on Mon Dec 07 1998 - 08:06:49 NZDT