> Please try out this patch if you have a "sis" based network card.
>
> It sets a 400usec interrupt holdoff, and this seems to have a profound
> impact on network performance.
>
> The patch is relative to FreeBSD-current but probably applies on
> 5.0, 5.1 and even 4.x as well.
>
> In my tests, using a soekris 4801 computer I have found:
>
> fetch(1)'ing a ftp:// file from a server on the local segment
> is 43.2% +/-0.7% faster (from around 385 to 640 kBps).
>
> FTP of the same file is 10.6% +/-1.2% faster (from 3.11 to
> 3.44 MB/sec)
>
> Checking out src/sbin from a NFS mounted CVSROOT was 17.0%
> +/-1.0% faster.
It is especially important that folks with Soekris 45xx boards try this.
My tests appeared to indicate there might be issues, but my operating
environment is so different from -current that is was hard to tell if the
problems I saw (lost packets) were due to this change or others.
Sam
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