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    SubjectRe: [PATCH 1/1] fat: improve sync performance by grouping writes revised
    The performance increase is pretty small. Using an old external dirve
    I had lying around I got:
    diff -y stock/10k modified/10k
    10240+0 records in | 1024+0
    records in
    10240+0 records out | 1024+0
    records out
    5242880 bytes transferred in 18.280922 seconds (286795 bytes/ | 524288
    bytes transferred in 1.824985 seconds (287283 bytes/se
    diff -y stock/1k modified/1k
    1024+0 records in 1024+0
    records in
    1024+0 records out 1024+0
    records out
    524288 bytes transferred in 1.777250 seconds (295000 bytes/se | 524288
    bytes transferred in 1.764748 seconds (297089 bytes/se

    The usual disclaimer of any benchmarking applies, YMMV.

    Cheers,

    Holden :-)

    On 10/31/06, OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> wrote:
    > Holden Karau <holdenk@xandros.com> writes:
    >
    > > From: Holden Karau <holden@pigscanfly.ca> http://www.holdenkarau.com
    > > This is an attempt at improving fat_mirror_bhs in sync mode [namely it
    > > writes all of the data for a backup block, and then blocks untill
    > > finished]. The old behavior would write & block in smaller chunks, so
    > > this should be slightly faster. It also removes the fix me requesting
    > > that it be fixed to behave this way :-)
    >
    > Please post the result of performance test. If it's fairly big, we
    > would be able to use async for mirror FAT. Instead, for hotplug device
    > we can provide the another option.
    > --
    > OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
    >


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