Date: Tue, 05 May 2009 00:47:11 +0200 From: Oleg Baranov <ol@csa.ru> To: freebsd-net@freebsd.org Subject: Awful forwarding rate [7.2-Release, igb] Message-ID: <49FF706F.1050209@csa.ru>
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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!!!!
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