Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!haven!ncifcrf!palmer
From: palmer@ncifcrf.gov (Thomas Palmer)
Newsgroups: comp.sys.sgi
Subject: Benchmark comparison of DEC 3100 and 4D/70GT
Keywords: benchmarks, R2000
Message-ID: <771@fcs280s.ncifcrf.gov>
Date: 31 Mar 89 03:05:38 GMT
Organization: NCI Supercomputer Center, Frederick, MD
Lines: 18


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
 PO Box B, Bldg. 430	Uucp: ...!uunet!ncifcrf.gov!palmer
 Frederick, MD 21701	Arpanet: palmer@ncifcrf.gov