Date: Tue, 02 Jun 2009 14:17:33 +0200 From: Michael <freebsdusb@bindone.de> To: freebsd-bugs@freebsd.org Subject: Bug in igb driver Message-ID: <4A25185D.2060304@bindone.de>
next in thread | raw e-mail | index | archive | help
Hello, we encountered problems using igb driver on a Supermicro dual quad-core system (X7DWU). It features an Intel Gigabit dual port controller (82575). The IP forwarding performance was extremely bad (5 kb/s up to 50 kb/s) until we disabled Large Receive Offloading in /etc/sysctl.conf: dev.igb.0.enable_lro=0 dev.igb.1.enable_lro=0 (changing it using ifconfig -lro and down/up the interfaces didn't help). With the systctl values set as shown above, we get the expected performance ob 50-60 MB/s. We tested this on 7.1-RELEASE, 7.2-RELEASE and 7-STABLE. Right now we're installing 8-CURRENT on the machine to see if it makes a difference. It think it would be worthwhile to list this issue in the 7.2 release errata section (that would've saved us a significant amount of time :). Cheers Michael
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4A25185D.2060304>