https://lists.ubuntu.com/archives/kernel-team/2017-March/082930.html
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Trusty)
Status: New => In Progress
** Changed in: linux (Ubuntu Trusty)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
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https://bugs.launchpad.net/bugs/1605494
Title:
vmxnet3 LRO IPv6 performance issues (stalling TCP)
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Trusty:
In Progress
Status in linux source package in Xenial:
Fix Released
Status in linux source package in Yakkety:
Fix Released
Bug description:
We have performance problems with TCP over IPv6 with SSH/SCP and HTTP traffic
on Linux guest virtual machines running on VMware ESXi (6.0u2). We are running
Ubuntu 12.04.5 LTS, 14.04.3 LTS and soon 16.04.1 LTS.
If we upload (large) files with these protocols the performance go's down to
200kb/s.
With IPv4, we have a much higher performance.
This is a known issue in the vmxnet3 driver that is fixed upstream on the
21th of April:
"This is due to check sum handling issue in the vmxnet3 driver. Fix is on
the kernel tree." http://comments.gmane.org/gmane.linux.network/401727
Kernel Patch:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f0d437809d23999cb25207cfbe80c61e5703fdc1
Another example of someone who has this problem:
https://lists.debian.org/debian-kernel/2016/03/msg00001.html
https://lists.debian.org/debian-kernel/2016/03/msg00002.html
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-61-generic 3.13.0-61.100
ProcVersionSignature: Ubuntu 3.13.0-61.100-generic 3.13.11-ckt22
Uname: Linux 3.13.0-61-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Jul 12 14:04 seq
crw-rw---- 1 root audio 116, 33 Jul 12 14:04 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Date: Fri Jul 22 08:05:09 2016
HibernationDevice: RESUME=UUID=4b881d72-9266-45cd-a12f-f21b55fe1ae7
InstallationDate: Installed on 2014-05-08 (805 days ago)
InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64
(20140416.2)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize
libusb: -99
MachineType: VMware, Inc. VMware Virtual Platform
PciMultimedia:
ProcFB: 0 svgadrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-61-generic
root=/dev/mapper/system-root ro
RelatedPackageVersions:
linux-restricted-modules-3.13.0-61-generic N/A
linux-backports-modules-3.13.0-61-generic N/A
linux-firmware 1.127.22
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:
dmi.bios.date: 09/21/2015
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 6.00
dmi.board.name: 440BX Desktop Reference Platform
dmi.board.vendor: Intel Corporation
dmi.board.version: None
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd09/21/2015:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
dmi.product.name: VMware Virtual Platform
dmi.product.version: None
dmi.sys.vendor: VMware, Inc.
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