SGI Origin 3800, 400 MHz MIPS R12K: 16 CPU STREAM Result

From: Wesley Jones (wesley@sgi.com)
Date: Fri Aug 25 2000 - 17:49:59 CDT

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    SGI Origin 3800
    16 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 = 80000000
     Offset = 0
     The total memory requirement is 1831 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 154598 microseconds
        (= 154598 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: 5534.40 0.2313 0.2318 0.2317 0.2317 0.2318
    Scale: 5493.65 0.2330 0.2342 0.2339 0.2339 0.2342
    Add: 6438.57 0.2982 0.2982 0.2982 0.2982 0.2982
    Triad: 6397.87 0.3001 0.3002 0.3002 0.3002 0.3002
    -----------------------------------------------------------------------------
     All times are
        0.2313 0.2330 0.2982 0.3001
        0.2318 0.2342 0.2982 0.3002
        0.2318 0.2342 0.2982 0.3002
        0.2318 0.2342 0.2982 0.3001
    -----------------------------------------------------------------------------
     Sum of a is = 1582.031250087564
     Sum of b is = 316.4062499721689
     Sum of c is = 421.8749999448031

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



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