Date: Tue, 02 Sep 2003 10:37:36 -0700 From: Sam Leffler <sam@errno.com> To: Poul-Henning Kamp <phk@phk.freebsd.dk>, current@freebsd.org Subject: Re: TESTERS: if_sis patch Message-ID: <752234866.1062499054@melange.errno.com> In-Reply-To: <44516.1062495892@critter.freebsd.dk> References: <44516.1062495892@critter.freebsd.dk>
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> 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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