Benchmark comparison of DEC 3100 and 4D/70GT

[Thomas Palmer]

We received a DEC 3100 demo unit today and I've run some benchmarks
comparing it to our 4D/70GT.  The results are somewhat perplexing.
On a floating point test (just raw +,-,*,divide) the 3100 performs at
about 2.2 mflops; the 4D/70GT at only 1.02 mflops.  With a Dhrystone
the 3100 produced 24590 dhrystones/sec; the 4D/70GT only 10204.
Our Cray only churns out 14705 dhrystones/sec!

What gives here?  They have the same chip set (R2000 plus R2010 fpa,
right?)  The compilers are the same.  Are the clock speeds the same?
Is DEC using more cache?  Any ideas?

  -Tom

 Thomas C. Palmer	National Cancer Institute Supercomputer Facility
 c/o PRI, Inc.		Phone: (301) 698-5797
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 Frederick, MD 21701	Arpanet: palmer at ncifcrf.gov