[Bug 894608] Re: Implementing a bridge slows 10G network
Christopher M. Penalver
christopher.penalver at gmx.com
Tue Jul 31 12:26:12 UTC 2012
Mike Imelfort, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test the latest upstream kernel available
following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow
additional upstream developers to examine the issue. Please do not test
the kernel in the daily folder, but the one all the way at the bottom.
Once you've tested the upstream kernel, please comment on which kernel
version specifically you tested and remove the 'needs-upstream-testing'
tag. This can be done by clicking on the yellow pencil icon next to the
tag located at the bottom of the bug description and deleting the
'needs-upstream-testing' text.
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.
If you are unable to test the mainline kernel, please comment as to why
specifically you were unable to test it and add the tag: 'kernel-unable-
to-test-upstream'.
Please let us know your results. Thanks in advance.
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** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/894608
Title:
Implementing a bridge slows 10G network
Status in “bridge-utils” package in Ubuntu:
Invalid
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
Installing bridge-utils and then setting up a bridge in
/etc/netwrok/interfaces decimates my netwrok speed. Uninstalling the
package and doing a reboot restores the speed.
This bug was originally posted here:
https://bugs.launchpad.net/qemu/+bug/861141 but I now realise it is
bridge-utils specific.
Hardware:
I have two identical machines (DELL poweredge R815), each with Broadcom NetXtreme II BCM57711 10-Gigabit PCIe connected via a 10G switch.
Each machine runs 4 socket 12 core AMD Opteron(tm) Processor 6174 and 128GB of ram
Software:
Both machines ar running ubuntu server 10.04 lts Kernels are:
Linux whitlam 2.6.32-28-server #55-Ubuntu SMP Mon Jan 10 23:57:16 UTC 2011 x86_64 GNU/Linux
Linux fraser 2.6.32-28-server #55-Ubuntu SMP Mon Jan 10 23:57:16 UTC 2011 x86_64 GNU/Linux
I have installed iperf on both machines.
The tests here involve running whitlam as the iperf server and fraser as the client.
On whitlam I run:
bioadmin at whitlam:~# iperf -sm
On fraser I run:
bioadmin at fraser:~# iperf -c whitlam -d
before installation I get:
bioadmin at whitlam:~# iperf -sm
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 5] local 10.168.48.14 port 5001 connected with 10.168.48.13 port 37960
------------------------------------------------------------
Client connecting to 10.168.48.13, TCP port 5001
TCP window size: 110 KByte (default)
------------------------------------------------------------
[ 6] local 10.168.48.14 port 49627 connected with 10.168.48.13 port 5001
Waiting for server threads to complete. Interrupt again to force quit.
[ 5] 0.0-10.0 sec 10.8 GBytes 9.23 Gbits/sec
[ 5] MSS size 1448 bytes (MTU 1500 bytes, ethernet)
[ 6] 0.0-10.0 sec 10.6 GBytes 9.11 Gbits/sec
[ 6] MSS size 1448 bytes (MTU 1500 bytes, ethernet)
Which is nice.
Next I run:
sudo aptitude -y install bridge-utils
and then I add a bridge to the interfaces file like thus:
FROM:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth4
iface eth4 inet static
address xx.xx.xx.xx
netmask 255.255.255.0
network xx.xx.xx.0
broadcast xx.xx.xx.255
gateway xx.xx.xx.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers blah blah
TO:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
#auto eth4
#iface eth4 inet manual
auto br0
iface br0 inet static
address xx.xx.xx.xx
netmask 255.255.255.0
network xx.xx.xx.0
broadcast xx.xx.xx.255
gateway xx.xx.xx.1
bridge_ports eth4
bridge_stp off
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers blah blah
And restart networking
sudo /etc/init.d/netwroking restart
Which results in:
bioadmin at whitlam:~# iperf -sm
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 4] local 10.168.48.14 port 5001 connected with 10.168.48.13 port 56405
------------------------------------------------------------
Client connecting to 10.168.48.13, TCP port 5001
TCP window size: 1.25 MByte (default)
------------------------------------------------------------
[ 6] local 10.168.48.14 port 57001 connected with 10.168.48.13 port 5001
Waiting for server threads to complete. Interrupt again to force quit.
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.0 sec 10.5 GBytes 9.00 Gbits/sec
[ 4] MSS size 1448 bytes (MTU 1500 bytes, ethernet)
[ 6] 0.0-10.0 sec 2.51 GBytes 2.15 Gbits/sec
[ 6] MSS size 1448 bytes (MTU 1500 bytes, ethernet)
Note that the connection from the machine with bridge-utils installed
(fraser) to the other machine (whitlam) is not affected. Only the
connection from whitlam to fraser.
Both machines are fresh installs with nfs-common, iperf installed.
Fraser also has bridge-utils
Any help is very much appreciated!
---
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu-Server 10.04.2 LTS "Lucid Lynx" - Release amd64 (20110211.1)
MachineType: Dell Inc. PowerEdge R815
Package: linux (not installed)
PackageArchitecture: amd64
PciMultimedia:
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.32-35-server root=UUID=cfbcc41d-7968-457b-971a-6b7d5d56e6d2 ro quiet
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-35.78-server 2.6.32.46+drm33.20
Regression: No
Reproducible: Yes
Tags: lucid lucid networking needs-upstream-testing
Uname: Linux 2.6.32-35-server x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 08/02/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.2.1
dmi.board.name: 04Y8PT
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.2.1:bd08/02/2010:svnDellInc.:pnPowerEdgeR815:pvr:rvnDellInc.:rn04Y8PT:rvrA00:cvnDellInc.:ct23:cvr:
dmi.product.name: PowerEdge R815
dmi.sys.vendor: Dell Inc.
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