SGI Origin 3800, 400 MHz MIPS R12K: 64 CPU STREAM Result

From: Wesley Jones (wesley@sgi.com)
Date: Fri Aug 25 2000 - 17:46:27 CDT

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    SGI Origin 3800
    64 CPUs
    400 MHz MIPS R12K
    8 MB cache
    96 GB Main Memory
    IRIX 6.5.9

    Results:
    ----------------------------------------------
     Double precision appears to have 16 digits of accuracy
     Assuming 8 bytes per DOUBLE PRECISION word
    ----------------------------------------------
     Array size = 320000000
     Offset = 0
     The total memory requirement is 7324 MB
     You are running each test 4 times
     The *best* time for each test is used
     ----------------------------------------------------
     Your clock granularity/precision appears to be 1 microseconds
     The tests below will each take a time on the order
     of 156029 microseconds
        (= 156029 clock ticks)
     Increase the size of the arrays if this shows that
     you are not getting at least 20 clock ticks per test.
     ----------------------------------------------------
     WARNING -- The above is only a rough guideline.
     For best results, please be sure you know the
     precision of your system timer.
     ----------------------------------------------------
    Function Rate (MB/s) Min time Max time Mean time RMS time Median
    Copy: 21824.30 0.2346 0.2357 0.2354 0.2354 0.2357
    Scale: 21953.05 0.2332 0.2344 0.2341 0.2341 0.2344
    Add: 24815.98 0.3095 0.3095 0.3095 0.3095 0.3095
    Triad: 25201.69 0.3047 0.3048 0.3048 0.3048 0.3048
    -----------------------------------------------------------------------------
     All times are
        0.2346 0.2332 0.3095 0.3048
        0.2357 0.2344 0.3095 0.3048
        0.2357 0.2344 0.3095 0.3047
        0.2357 0.2344 0.3095 0.3048
    -----------------------------------------------------------------------------
     Sum of a is = 395.5078125218910
     Sum of b is = 79.10156249304222
     Sum of c is = 105.4687499862008

    -- 
    Wesley B. Jones, PhD                    wesley@sgi.com
    SGI, Boulder, CO                        Phone: (303)-448-1165
    Performance Engineering                 FAX:
    



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