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From: csrdh@marlin.jcu.edu.au (Rowan Hughes)
Newsgroups: comp.benchmarks,comp.sys.hp
Subject: A benchmark
Summary: A benchmark
Keywords: snake performance
Message-ID: <1991May3.023705.5616@marlin.jcu.edu.au>
Date: 3 May 91 02:37:05 GMT
Organization: James Cook University
Lines: 56

Some benchmarks for a typical large scale scientific program.

------------------------
     CPU times for the Geophysical Fluid Dynamics Model MOM_1.0 (Fortran).

     From the Geophysical Fluid Dynamics Lab - NOAA, Princeton, New Jersey.
     Written by Ron Pacanowski, Keith Dixon, and Tony Rosati; based on the
     original Cox-Bryan model.
     The code is well vectorized, and consists mostly of floating point
     multiplies/additions. The single and double precision times for
     the IBM were exactly the same. The cpu time for the two processor
     Convex is total sum from each processor (63 secs each).
     The estimated benchmark for the IBM540 is 11Mflops, and 22Mflops
     for the IBM550.

                                         Job
          Machine   | CPU secs | Mflop | Size MB |     Comments
        ----------------------------------------------------------------
        IBM-320         195       5.1      7.7     REAL*8, optimized.
                        195       5.1      4.0     REAL*4, "        "

	HP-720 "Coral"  197       5.1      8.0     REAL*8, optimized O2.
                        132       7.6      4.0     REAL*4, "           "

        DS5100          495       2.0      7.9     REAL*8, optimized O2.
                        330       3.0      4.0     REAL*4, "           "

   **   Convex C2400     97      10.8      8.9     REAL*8, vectorized,
                         73      14.2      4.5     REAL*4, 1 processor.
                       126/2     16.3      8.9     REAL*8, 2 processors


        Cray Y/MP        14      71.0     ~8.0     REAL*8, vectorized,
        (GFDL, NOAA)                                       1 processor.
        ----------------------------------------------------------------
**  Real time for 1 proc = 99sec, 2 proc = 78sec  using REAL*8.

Machine Specifics:
      Machine     Memory(MB)    Disk(MB)
      ----------------------------------
      IBM-320          16         340
      HP-720           32         340
      DS5100           24        1200
      C2400           512       ~3000
      Y/MP           ~512         ?
------------------------

You'd need more dollars than cents to even think of buying a Convex.
7.6/5.1Mflops for the HP-720 is just a touch below the 17Mflops quoted in
the HP blurb. Perhaps its time than ANSI created an "official" set
of benchmarks.

-- 
Rowan Hughes                                James Cook University
Marine Modelling Unit                       Townsville, Australia.
Dept. Civil and Systems Engineering         csrdh@marlin.jcu.edu.au