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    SubjectRe: Testing the effects of the low latency patch
    J Sloan wrote:
    >
    > I had earlier posted reports about the low latency patch in terms
    > that are too subjective - e.g. saying that "quake 3 arena feels much
    > smoother and I frag a lot more" isn't the kind of hard statistical
    > evidence demanded by some. I have attempted to quanitify the latency
    > differences in one of the workloads where I see and feel a difference.

    mm. Numbers. Nice.

    >
    > 2.4.18-pre6+tux+nfs-fixes
    > -------------
    > ...
    > 7.6 1
    > 7.8 1
    > 21.1 1

    This is the stock kernel. In twenty minutes you suffered
    precisely *one* scheduling overrun which is perceptible
    by a human. The rest are much shorter than your monitor's
    refresh interval. Interesting, yes?

    These results are better than the ones I normally measure.

    > ...
    > The dbench results:
    >
    > 2.4.18-pre6+tux+nfs-fixes
    > ---------------------------------
    > ...
    > Throughput 48.9432 MB/sec (NB=61.179 MB/sec 489.432 MBit/sec) 16 procs
    > ...
    >
    > 2.4.18-pre6+tux+nfs-fixes + low latency patch
    > ---------------------------------
    > ...
    > Throughput 106.361 MB/sec (NB=132.951 MB/sec 1063.61 MBit/sec) 16 procs
    > ...

    Now that's odd.

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