Power Mac Dual G5 2.5GHz single proc results

From: Jonas August (jonas@cs.cmu.edu)
Date: Sun Jan 16 2005 - 14:20:58 UTC

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    I just ran stream on a Dual 2.5GHz Power Mac G5 PPC 970FX with 512MB RAM
    and 512kB L2 cache; processor speed was set to "Automatic", but I didn't
    get improvement when I made it "Highest". The OS is Mac OS X 10.3.7
    with gcc 3.3 (apple build 1640). For a single processor test I compiled
    gcc -fast -o stream_d second_wall.c stream_d.c
    which is supposed to optimize for G5. The result is:
    This system uses 8 bytes per DOUBLE PRECISION word.
    Array size = 2000000, Offset = 0
    Total memory required = 45.8 MB.
    Each test is run 10 times, but only
    the *best* time for each is used.
    Your clock granularity/precision appears to be 1 microseconds.
    Each test below will take on the order of 12201 microseconds.
       (= 12201 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) RMS time Min time Max time
    Copy: 1978.5036 0.0169 0.0162 0.0186
    Scale: 1972.8907 0.0168 0.0162 0.0192
    Add: 2208.1095 0.0222 0.0217 0.0229
    Triad: 2215.4477 0.0222 0.0217 0.0229

    I didn't do a dual proc. test because I don't have an openmp compiler.

    Jonas August                              jonas*cs.cmu.edu (*=@)
    www.cs.cmu.edu/~jonas         tel(412)268-1314  fax(412)268-6436
    Robotics Institute, Carnegie Mellon University  
    A409 Newell-Simon Hall, 5000 Forbes Avenue, Pittsburgh, PA 15213

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