standard STREAM on IBM eServer p5 575 (1500 MHz, 16cpu)

From: Ly Vu (lyvu@us.ibm.com)
Date: Tue Aug 09 2005 - 10:00:07 CDT

  • Next message: Ly Vu: "tuned STREAM on IBM eServer p5 575 (1500 MHz, 16cpu)"

    These are standard STREAM results on an IBM eServer p5 575
    with sixteen 1.5 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: 38218.6049 .1123 .1123 .1124
    Scale: 37825.6681 .1135 .1135 .1136
    Add: 42179.1238 .1527 .1527 .1528
    Triad: 42631.8617 .1512 .1510 .1514

    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 = 2560
    ----------------------------------------------
     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: 38218.6049 .1123 .1123 .1124
    Scale: 37825.6681 .1135 .1135 .1136
    Add: 42179.1238 .1527 .1527 .1528
    Triad: 42631.8617 .1512 .1510 .1514
     ----------------------------------------------------
     Solution Validates!
     ----------------------------------------------------

    ______________________________________________
    Ly Vu
    IBM Corp. - Austin, Texas.
    RS/6000 Performance Analysis.
    Phone : (512) 838-8228
    Email : lyvu@us.ibm.com



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