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view 2014/February/memo/MMAPvsDivideRead.txt @ 39:4a4d6e475571

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add 07th.txt
author Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
date Sat, 08 Feb 2014 03:51:57 +0900
parents 85f3125dd461
children 2b55530913a2
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[program]
    [実験環境]
        firefly で計測
        2*2.66 GHz, HHD 1TB, memory 16GB
        読み込んだ file size : 10740996168 Byte (10GB)

        読み込んでから Task が終了するまでの時間を測定

        divide read で一度に読み込む量 : 4*4096*1024 Byte


    % ./fileread -file ../regex_mas/10gb.txt -cpu 12 -dr

    bm_search one task size 16k
    [結果]
          |          -SPE_ANY-|--IO_0---|
    CPUNUM|    MMAP      DRead|   DRead|
        2                      95.865063
        3
        4                      104.667434
        8                      114.974203
       12  111.810354          147.010479
       24                      99.040944

       12 MMAP 111.810354 63.559829 77.970525
    IO_0 BRead  79.868357 115.067654 107.77211 96.924706
 SPE_NUM BRead  102.420338 120.658969 102.126428 118.725368

       11 MMAP 
    IO_0 BRead 99.384507 116.714300 134.678377 97.970632

        4
    IO_0 BRead 102.480095 

        filesize 15GB
        12
    mmap        160.332098 224.448694
    IO_0 BRead     276.518567  205.553947

        12   1 Task size 65536
    mmap       210.000087
    IO_0 BRead 209.456416