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    SubjectRe: [PATCHSET 1][PATCH 0/6] Filesystem AIO read/write

    * Suparna Bhattacharya <suparna@in.ibm.com> wrote:

    > The following is a sampling of comparative aio-stress results with the
    > patches (each run starts with uncached files):
    >
    > ---------------------------------------------
    >
    > aio-stress throughput comparisons (in MB/s):
    >
    > file size 1GB, record size 64KB, depth 64, ios per iteration 8
    > max io_submit 8, buffer alignment set to 4KB
    > 4 way Pentium III SMP box, Adaptec AIC-7896/7 Ultra2 SCSI, 40 MB/s
    > Filesystem: ext2
    >
    > ----------------------------------------------------------------------------
    > Buffered (non O_DIRECT)
    > Vanilla Patched O_DIRECT
    > ----------------------------------------------------------------------------
    > Vanilla Patched
    > Random-Read 10.08 23.91 18.91, 18.98
    > Random-O_SYNC-Write 8.86 15.84 16.51, 16.53
    > Sequential-Read 31.49 33.00 31.86, 31.79
    > Sequential-O_SYNC-Write 8.68 32.60 31.45, 32.44
    > Random-Write 31.09 (19.65) 30.90 (19.65)
    > Sequential-Write 30.84 (28.94) 30.09 (28.39)

    the numbers look very convincing to me!

    Ingo
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