standard STREAM on IBM System p5 575 (16CPUs 1.9 GHz)

From: Ly Vu (lyvu@us.ibm.com)
Date: Sun Feb 12 2006 - 20:33:14 CST

  • Next message: Ly Vu: "tuned STREAM on IBM System p5 575 (8CPUs 2.2 GHz)"

    These are standard STREAM results on an IBM System p5 575
    with sixteen 1.9 GHz cpus. This is a POWER5+ SMP machine.
    Large pages were used in all cases.

    Function Rate (MB/s) Avg time Min time Max time
    Copy: 76301.8114 .0567 .0563 .0571
    Scale: 76921.1549 .0559 .0558 .0559
    Add: 84656.1152 .0761 .0761 .0762
    Triad: 86061.8261 .0752 .0748 .0755

    Here is the full output file:
    --------------------------------------------------
     Requesting Large Pages
     Setting up for 2 CPUs per module
     Number of segments per array = 8
     CPU binding list : 0 2 4 6 8 10 12 14
     Shared Segment Pointer = 504403158265495552
     Shared Segment Pointer = 504403160412979200
     Shared Segment Pointer = 504403162560462848
     Segment Size (B) = 268435456 (MB = 256 )
     Array Size (B) = 2147483648 (MB = 2048 )
     Array Size (DW) = 268435456
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     Num_threads = 16
     rebind: num_parthds is 16
     Starting Initialization
     Done With Initialization
     a(1) 1.00000000000000000
     b(M) 1.00000000000000000
     c(M) 1.00000000000000000

     Incremental Offset = 512
    ----------------------------------------------
     Double precision appears to have 16 digits of accuracy
     Assuming 8 bytes per DOUBLE PRECISION word
    ----------------------------------------------
     Array size = 268301312
     The total memory requirement is 6140 MB
     You are running each test 5 times
     --
     The *best* time for each test is used
     *EXCLUDING* the first and last iterations
     ----------------------------------------------------
     Your clock granularity appears to be less than one microsecond
     Your clock granularity/precision appears to be 1 microseconds
     ----------------------------------------------------
    Function Rate (MB/s) Avg time Min time Max time
    Copy: 76301.8114 .0567 .0563 .0571
    Scale: 76921.1549 .0559 .0558 .0559
    Add: 84656.1152 .0761 .0761 .0762
    Triad: 86061.8261 .0752 .0748 .0755
     ----------------------------------------------------
     Solution Validates!
     ----------------------------------------------------

    ______________________________________________
    Ly Vu
    IBM Corp. - Austin, Texas.
    AIX/pSeries Performance

    Phone : (512) 838-8228
    Email : lyvu@us.ibm.com



    This archive was generated by hypermail 2.1.4 : Sun Feb 12 2006 - 23:21:49 CST