Date: Tue, 12 Jun 2001 13:28:53 -0400 From: "Robin P. Blanchard" <Robin_Blanchard@gactr.uga.edu> To: Jesper Skriver <jesper@skriver.dk> Cc: stable@freebsd.org Subject: Re: gigabit woes Message-ID: <3B265155.ACE63DEF@gactr.uga.edu> References: <3B2647E0.E40A2339@gactr.uga.edu> <20010612190345.A20019@skriver.dk>
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ok. currently in our dell poweredge 4350 there is a 3com 3c985b with alteon-2 chipset plugged into a 64-bit pci slot. the kernel is built to use the ti driver (with kernel NMBCLUSTERS set to 16896). this is directly connected to a gig port on our extreme black diamond. a basic ip test of ftping to a known functional gig interface (an SGI origin 2000 also directly attached to our black diamond -- the same test on this interface with a similar interface on a separate module of this SGI box yields 12.183MB/s) yields a mere 2.37MB/s. both the gig port on the black diamond and the nic in the freebsd box are auto-negotiating. relevant /etc/sysctl.conf: net.inet.tcp.rfc1323=1 net.inet.tcp.sendspace=65536 net.inet.tcp.recvspace=65536 net.inet.udp.sendspace=65536 net.inet.udp.recvspace=65536 relevant /etc/rc.conf: icmp_drop_redirect="YES" inetd_enable="NO" kern_securelevel_enable="NO" moused_enable="NO" nfs_client_enable="YES" ntpdate_enable="YES" ntpdate_flags="10.10.10.11" sendmail_enable="NO" sshd_enable="NO" tcp_drop_synfin="YES" tcp_extensions="YES" tcp_keepalive="YES" usbd_enable="NO" we get similarly poor performance if we swap the 3com with an intel. more performance tuning suggestions are extremely welcomed. thanks in advance. Jesper Skriver wrote: > > On Tue, Jun 12, 2001 at 12:48:32PM -0400, Robin P. Blanchard wrote: > > we've tried both an intel (device xw) gig card > > as well as a 3com (device ti) card in a 4.3-STABLE > > box. the other end of the line is an extreme black > > diamond gig port. both ends are autoconfigured > > and the stats on the extreme show it's autoconfigured > > at 1000. so everything looks good. we are not seeing > > packet loss, either. unfortunately, our transfer > > rates are barely reaching 3MB/s. > > Measured how ? > > Traffic transfered to/from which host ? > > Which protocol ? > > Which HW do you use on the FreeBSD machine > > > are there some options > > on the FreeBSD side we need to fiddle with to get this > > thing to do decent performance? > > sysctl -w net.inet.tcp.sendspace=65536 > sysctl -w net.inet.tcp.recvspace=65536 > sysctl -w net.inet.tcp.rfc1323=1 > > And permanent > > echo "tcp_extensions=\"YES\"" >> /etc/rc.conf > echo "net.inet.tcp.sendspace=65536" >> /etc/sysctl.conf > echo "net.inet.tcp.recvspace=65536" >> /etc/sysctl.conf -- ------------------------------------ Robin P. Blanchard IT Program Specialist Georgia Center for Continuing Ed. fon: 706.542.2404 fax: 706.542.6546 email: Robin_Blanchard@gactr.uga.edu ------------------------------------ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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