Date: Mon, 12 Apr 2004 17:42:21 +0300 From: Ruslan Ermilov <ru@FreeBSD.org> To: Christian Weisgerber <naddy@mips.inka.de> Cc: freebsd-net@FreeBSD.org Subject: Re: re(4): puzzling netperf result Message-ID: <20040412144221.GA1420@ip.net.ua> In-Reply-To: <c5e9c3$1iv6$1@kemoauc.mips.inka.de> References: <c5e9c3$1iv6$1@kemoauc.mips.inka.de>
next in thread | previous in thread | raw e-mail | index | archive | help
[-- Attachment #1 --] On Mon, Apr 12, 2004 at 02:33:39PM +0000, Christian Weisgerber wrote: > I just did some quick and dirty checks with netperf and noticed a > somewhat surprising result. > > Machine A: Alpha PC164, FreeBSD 5.2-CURRENT, re(4), 1000Base-T > Machine B: Alpha PC164SX, OpenBSD 3.5, de(4), 100Base-TX > Switch: StarChip SGS-1008 (10/100/1000Base-T) > > Running netperf -t UDP_STREAM on machine A with target B reports a > throughput of ~200(!) Mbit/s. > > How does the machine get the idea it is pushing 200 Mbit/s down a > 100 Mbit/s link? > Does ``netstat -I re0 -w 1'' show the same numbers while you're running the UDP_STREAM test? Cheers, -- Ruslan Ermilov ru@FreeBSD.org FreeBSD committer [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAeqrNUkv4P6juNwoRAkDlAKCHWkq7lzJ0yH4USci7ATOoNkOR6QCffwbG N/cUuzdjnnQpdIVXLWyxhho= =EDTP -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040412144221.GA1420>