Original Question (2/17/98)::
I'd appreciate suggestions for improving the graphics performance
of DEC Personal Workstations running Digital Unix.
Our users who typically run their apps on Sun Ultras have complained that
the DEC PWs are 8-10 times slower on their benchmarks. They got a bunch of
extra speedup on the Ultras using an optimized XIL (I think) library.
Is this library (or an equivalent) available for the PWs?
But even without XIL, an Ultra1 is ~25% faster.
Followup Post (2/18/98):
The goal:
I am interested in finding ways of increasing the "frames/second" rate of this
benchmark [code snipped, available upon request], or in why this runs so much
faster on Ultras. The benchmark should complete in only a few seconds.
Any information in this area would be greatly appreciated.
I'll summarize the runs (non-DEC gladly accepted).
The Summary:
Thanks to
Don Rothkugel (Donald.Rothkugel_at_digital.com)
Ed Bolson (BOLSON_at_FRANGO.HS.WASHINGTON.EDU)
Larry Church (lchurch_at_moriarty.corp.adobe.com)
Paul Watson (phwatso_at_cooper-energy-services.com)
Marco Campani (campani_at_fisica.unige.it)
Don Rothkugel provided a modified version of the benchmark
[source available upon request] that uses the SHM-MIT extension.
Ed, Larry, Paul, and Marco ran benchmarks for me.
Summary Table
/------------------------------------------------------------------------\
| | ORIGINAL | SHM-MIT Extension |
|---------------------------------+------------------+-------------------|
|Model Card | 176x144 352x288 | 176x144 352x288 |
|---------------------------------+------------------+-------------------|
|DEC | | |
| PW433 4D60T | 345 95 | 454 122 ?? |
| AS500/400 4D50T | 278 83 | --- --- |
| AS500/500(winterz) ZLXp2 | 263 71 | 833 263 |
| AS500/500(lchurch) ZLXp2 | 233 64 | --- --- |
| PW433 4D20T | 256 64 | 588 156 |
| AS255/300 ZLXp2 | 116 28 | --- --- |
|---------------------------------+------------------+-------------------|
|SUN | | |
| Ultra3 2x300 Creator| 694 169 | 1973 522 |
| Ultra2 2x200 Creator| 595 155 | 1785 528 |
| Ultra1 167 Creator | 320 87 | --- --- |
|---------------------------------+------------------+-------------------|
|SGI | | |
| R10K Indy^2 IMPACT | 204 56 | 769 232 |
|---------------------------------+------------------+-------------------|
|HP | | |
| Visualize C180 ?? | 455 67 | 357 95 |
\------------------------------------------------------------------------/
Again, source code for both benchmarks is available upon request.
And I'm still curious why the Creator card performs so well.
-Allen Winter, winterz_at_clark.net
Received on Fri Apr 03 1998 - 01:52:06 NZST