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  • 1.  AIX 6.1 Power7 Performance (Java)

    Posted Thu July 25, 2013 05:23 PM

    Originally posted by: doit_ksa


    We are facing a performance problem with a AIX / Power7 LPAR running WAS/ Portal. to try to slove the problem we used a benchmark to compare the LPAR with PC performance, and we found out that the PC (Intel i7)  is much faster.

     
    The Benchmark we used is Scimark http://math.nist.gov/scimark2/
     
    Here is our results : 
    • AIX Dev LPAR : 250 Mflops  (1 core)
    • Win XP / Intel i5: 752 Mflops (1 core)
    • Linux / Intel i7 : 1366 Mflops (1 core) // 5-6 faster than AIX !!!
    We have done all the JPA (Java Performance Advisory) and the number didn't changed, is this normal ?
     
     
    Below is the part config 
     
    # prtconf
    System Model: IBM,9117-MMB
    Machine Serial Number: 10C78CP
    Processor Type: PowerPC_POWER7
    Processor Implementation Mode: POWER 7
    Processor Version: PV_7_Compat
    Number Of Processors: 4
    Processor Clock Speed: 3500 MHz
    CPU Type: 64-bit
    Kernel Type: 64-bit
    LPAR Info: *****************
    Memory Size: 16384 MB
    Good Memory Size: 16384 MB
    Platform Firmware level: AM730_066
    Firmware Version: IBM,AM730_066
    Console Login: enable
    Auto Restart: true
    Full Core: false
     

    Thanks in advance !


    #AIX-Forum


  • 2.  Re: AIX 6.1 Power7 Performance (Java)

    Posted Sat July 27, 2013 11:16 PM

    Originally posted by: flodstrom


    Does indeed look like something is not okay. I just tried this on an old POWER4+ (1.45GHz) with AIX 6.1 and I got around 250. Also by using java6 64bit I got almost 300 on the same old machine.

    Are your available processors by any chance micro partitions?

     

     


    #AIX-Forum


  • 3.  Re: AIX 6.1 Power7 Performance (Java)

    Posted Sun July 28, 2013 02:00 AM

    Originally posted by: doit_ksa


    Thanks a lot for the reply, not sure about the "micro partitions" , what is the command to check that ?

    Also I do need a favor , could you please run the command again as this :

    time(java -cp scimark2lib.jar jnt.scimark2.commandline -large)

    And please share the result here.

    We get score of 540~ for normal (no argument) but with "-large" we get the 250~ ( the above tests were all done with "-large" argument. )

    I have noticed something, when using command "time" in AIX we get something like this :

    real   0m24.000s

    user   0m16.000s <--- Not full utilization of the CPU power, in Linux the real time almost equal the user time

    sys   0m0.140s

     

    Thanks in advance .


    #AIX-Forum


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