Stream results for an HP Integrity rx2620

From: Kirby L. Collins (kcollins@rsn.hp.com)
Date: Mon Nov 08 2004 - 11:08:40 CST

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    Below are single cpu stream results for an HP Integrity rx2620-2, configured as follows:

    HP Integrity rx2620-2
    2x1.6GHz/3M Itanium 2 processors
    24GB memory (12x2GB DIMMs)
    HP-UX 11.23.09

    ----------------------------------------------
     Double precision appears to have 16 digits of accuracy
     Assuming 8 bytes per DOUBLE PRECISION word
    ----------------------------------------------
     Array size = 32000960
     Offset = 0
     The total memory requirement is 732 MB
     You are running each test 10 times
     --
     The *best* time for each test is used
     *EXCLUDING* the first and last iterations
     ----------------------------------------------------
     Your clock granularity/precision appears to be 1 microseconds
     ----------------------------------------------------
    Function Rate (MB/s) Avg time Min time Max time
    Copy: 3459.4462 0.1482 0.1480 0.1487
    Scale: 3469.5511 0.1479 0.1476 0.1484
    Add: 4029.8614 0.1908 0.1906 0.1910
    Triad: 4033.9642 0.1906 0.1904 0.1910
     ----------------------------------------------------

    I used Revision 5.0 of the stream code, modified to set the array size and to place the a,b,c arrays in common:

    63c63
    < PARAMETER (n=2000000,offset=0,ndim=n+offset,ntimes=10) 

    ---
>       PARAMETER (n=32000960,offset=0,ndim=n+offset,ntimes=10)
88c88
< *     COMMON a,b,c
---
>       COMMON a,b,c

    and compiled with HP Fortran 90 :

    f90 -o stream_d.uni +O3 +DSitanium2 +DD64 +Onoopenmp +extend_source +autodbl4 +noppu -Wl,+pd,16M stream_d.uni.f second_wall.o

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