* Suparna Bhattacharya <[email protected]> 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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