My experience with our Ultra60 is that Java3D performance is about 15 times
SLOWER
than on a 750 MHz PIII with a Diamond Fire GL 1 video card, PIIIs and
Athlons with
GeForce cards, etc. It would appear that Sun's graphics hardware is just
not equal
to the latest PC cards. The Ultra60 is great for number crunching but I
would not
recommend it as a cost effective solution for high performance graphics.
Jim Schatzman
At 11:58 AM 6/13/2000 -0400, you wrote:
>We recently got some Ultra60s with both Elite-m6 and Expert3D cards in
>them. We're now trying out some of our Java-3D programs that use large
>textures (the Expert3D is the first card for the sun that may have
>decent texture performance for our apps).
>
>However, we are seeing a disturbing artifact we didn't see on (slower) NT
>machines.
>
>The simple program we tried creates a simple polygon with a large-ish
>(512x512) texture on it, and spins it in the center of the screen.
>
>On the NT machines, it's nice and smooth. On the Elite-3D, it
>"stutters" occasionally. Surprisingly, on the Expert-3D, the polygon
>motion has a lot more stutter in it.
>
>By stutter, I mean that it pauses occasionally (short pauses), and then
>jumps when it starts (since this is a time-based animation). This is the
>kind of thing I was used to seeing when I used Modula-3 with a
>non-incremental garbage collector or with non-native threads. But, we are
>using Hotspot, have incremental GC enabled, and are using native threads.
>
>We tried the verbose heap debugging and there is no global collections
>happening. Our program is not generating any garbage itself (of course,
>who knows what J3D is doing).
>
>We are using the newest software: 1.3 beta of Java2, and 1.2 Java3D.
>
>Any ideas what might be causing the non-smooth performance? There is
>nothing running on the machine that would cause it: my own Modula-3
>programs (which use garbage collection, threads and opengl, but not
>native threads) run perfectly smoothly.
>
>thanks for any pointers.
>
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