Date: Mon, 4 May 2009 16:23:41 -0700 From: Jack Vogel <jfvogel@gmail.com> To: Oleg Baranov <ol@csa.ru> Cc: freebsd-net@freebsd.org Subject: Re: Awful forwarding rate [7.2-Release, igb] Message-ID: <2a41acea0905041623s1b7793d5s16c0375ce1b5e606@mail.gmail.com> In-Reply-To: <49FF706F.1050209@csa.ru> References: <49FF706F.1050209@csa.ru>
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Turn off LRO, its on by default, you can do it with sysctl, be sure to down and up the interface. In FreeBSD 8 this will be automagic but for 7.2 its manual. Jack On Mon, May 4, 2009 at 3:47 PM, Oleg Baranov <ol@csa.ru> wrote: > Hello! > > I have extremely low forwarding speed on 7.2-Release box with dual Intel > 82575. > > Box "B" with dual 82575 nic is connected between A and C using gigabit > swithes > A <---> B <----> C > > > iperf run from A to C shows: > > $ iperf -w 128k -c 192.168.111.3 > ------------------------------------------------------------ > Client connecting to 192.168.111.3, TCP port 5001 > TCP window size: 129 KByte (WARNING: requested 128 KByte) > ------------------------------------------------------------ > [ 3] local 192.168.1.15 port 51077 connected with 192.168.111.3 port 5001 > [ ID] Interval Transfer Bandwidth > [ 3] 0.0-11.2 sec 160 KBytes 117 Kbits/sec > > > > the same run from A to B shows: > > ]$ iperf -w 128k -c 192.168.1.153 > ------------------------------------------------------------ > Client connecting to 192.168.1.153, TCP port 5001 > TCP window size: 129 KByte (WARNING: requested 128 KByte) > ------------------------------------------------------------ > [ 3] local 192.168.1.15 port 60907 connected with 192.168.1.153 port 5001 > [ ID] Interval Transfer Bandwidth > [ 3] 0.0-10.0 sec 1.09 GBytes 933 Mbits/sec > > > and from B to C shows: > > $ iperf -w 128k -c 192.168.111.3 > ------------------------------------------------------------ > Client connecting to 192.168.111.3, TCP port 5001 > TCP window size: 129 KByte (WARNING: requested 128 KByte) > ------------------------------------------------------------ > [ 3] local 192.168.111.254 port 64290 connected with 192.168.111.3 port > 5001 > [ ID] Interval Transfer Bandwidth > [ 3] 0.0-10.0 sec 1.08 GBytes 930 Mbits/sec > > > Boxes B and C are both dual quad-core e5420 CPUs on Supermicro X7DWN+ > motherboard. > As A I tried several machines including dual quad-core Phenom system as > well as some portable PCs and workstations residing in the same LAN. > > Here is ifconfig from B > > $ ifconfig > igb0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4> > ether 00:30:48:c8:19:66 > inet 192.168.1.153 netmask 0xffffff00 broadcast 192.168.1.255 > media: Ethernet autoselect (1000baseTX <full-duplex>) > status: active > igb1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4> > ether 00:30:48:c8:19:67 > media: Ethernet autoselect (1000baseTX <full-duplex>) > status: active > lagg: laggdev lagg0 > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384 > inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 > inet6 ::1 prefixlen 128 > inet 127.0.0.1 netmask 0xff000000 > lagg0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4> > ether 00:30:48:c8:19:67 > inet 192.168.111.254 netmask 0xffffff00 broadcast 192.168.111.255 > media: Ethernet autoselect > status: active > laggproto lacp > laggport: igb1 flags=1c<ACTIVE,COLLECTING,DISTRIBUTING> > gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1280 > tunnel inet 192.168.1.153 --> 192.168.1.156 > inet 192.168.111.254 --> 192.168.112.254 netmask 0xffffffff > > > I tried to remove lagg & gif interfaces, boot GENERIC kernel and even set > up same net config from LiveFS cd - nothing helps. Forwarding speed > sometimes goes up to 1-2 Mbit/sec while local speeds are always above > 900Mbit. > System load is less 1%, logs contain nothing interesting... > > Any clues and ideas would be appreciated!!!! > > > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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