2014/04/18 (Fri)
    [memo]
    word count の再計測

    ./word_count -file 1gb.txt -cpu 12 -division 128 -block 48 -m
    (CPU num = 12)
    < mmap               > 22.713 0.878
    < read               > 12.520 1.469
    < bread & IO_0       > 10.295 0.886
    < bread & SPE_ANY    > 14.028 0.882

    (CPU num = 8)
    < mmap               > 22.789 0.952
    < read               > 14.785 1.571
    < bread & IO_0       > 14.774 0.857
    < bread & SPE_ANY    > 15.287 1.009

    (CPU num = 4)
    < mmap               > 22.861 1.739
    < read               > 15.737 2.303
    < bread & IO_0       > 14.634 1.565
    < bread & SPE_ANY    > 15.646 1.941

    (CPU num = 1)
    < mmap               > 20.179 6.521
    < read               > 21.351 6.832
    < bread & IO_0       > 13.930 6.009
    < bread & IO_0       > 18.531 6.775



    ./word_count -file X gb.txt -cpu 12 -division 128 -block 48 -m
    (file size 2GB)
    < mmap               > 38.208
    < read               >
    < bread & IO_0       > 24.201
    < bread & SPE_ANY    > 28.411

    (file size 3GB)
    < mmap               > 58.514 2.290
    < read               >
    < bread & IO_0       > 36.397
    < bread & SPE_ANY    > 41.740

    (file size 4GB)
    < mmap               > 73.767
    < read               >
    < bread & IO_0       > 47.967
    < bread & SPE_ANY    > 53.813




    ./word_count -file 1gb.txt -cpu 12 -division 16 -block 48 -m
    < mmap               > 11.137 0.854
    < read               > 11.437 1.487
    < bread & IO_0       > 11.412 0.847
    < bread & SPE_ANY    > 11.146 0.866

    ./word_count -file 1gb.txt -cpu 1 -division 16 -block 48 -m
    < mmap               > 17.421 6.739
    < read               > 19.285 7.037
    < bread & IO_0       > 
    < bread & SPE_ANY    >