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    SubjectRe: UDMA Support for ALI1543?
    Greg wrote:
    >
    ...
    > 2.2.1-ac6 (Standard IDE Driver)
    ...
    > Timing buffered disk reads: 64 MB in 9.51 seconds = 6.73 MB/sec
    > Timing buffered disk reads: 64 MB in 9.39 seconds = 6.82 MB/sec
    >
    > 2.2.2-ac1-uniform-ide
    ...
    > Timing buffered disk reads: 64 MB in 8.33 seconds = 7.68 MB/sec
    > Timing buffered disk reads: 64 MB in 10.19 seconds = 6.28 MB/sec
    >
    > So.. there is most definitly an improvement. Got any suggestions for a
    > better disk speed suite than "hdparm"?

    There is nothing better for this purpose.

    "hdparm" tries very hard to accurately measure the data transfer rate (DTR)
    of a drive: a very narrow test, agreed, but the DTR is the *only* thing
    that the driver can affect (access patterns, seek rates, settling times etc..
    are all pretty much constant, regardless of any existing driver changes).

    So if you want to measure the effects of driver updates, "hdparm" is the
    only meaningful measure.

    But if you want to measure overall system performance, which dilutes the
    driver component to a tiny fraction, then there are tons of superior tools
    (iozone, bonnie, ..).
    --
    mlord@pobox.com

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