[Bug 1802691] Autopkgtest regression report (linux-oracle-5.4/5.4.0-1019.19~18.04.1)

All autopkgtests for the newly accepted linux-oracle-5.4 (5.4.0-1019.19~18.04.1) for bionic have finished running.
The following regressions have been reported in tests triggered by the package:

zfs-linux/unknown (armhf)


Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-
migration/bionic/update_excuses.html#linux-oracle-5.4

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

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https://bugs.launchpad.net/bugs/1802691

Title:
Slow send speed with Intel I219-V on Ubuntu 18.04.1

Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux-oem-osp1 package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Fix Committed
Status in linux-oem-osp1 source package in Bionic:
In Progress
Status in linux source package in Eoan:
Fix Committed
Status in linux source package in Focal:
Fix Committed
Status in linux-oem-5.6 source package in Focal:
Fix Committed
Status in linux source package in Groovy:
In Progress

Bug description:
[Impact]
The throughput measured by iperf3 is around 70% of 1Gbps (Intel I219-LM
[8086:15b7])
I219 is a rather cheap NIC and it impacts its throughput if TSO(TCP
segmentation offload) is enabled.

[Fix]
Disable TSO on NIC and move this task back to CPU fixes this issue.
The impact of CPU loading is little to none.
On target machine with Xeon(R) CPU E3-1505L v6 @ 2.20GHz(4c8t), the CPU
usage of iperf3 increases from 1% to 4%

[Verify]
Origin
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 918 MBytes 770 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 916 MBytes 769 Mbits/sec receiver

Becomes
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 1.09 GBytes 936 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 1.09 GBytes 934 Mbits/sec receiver

[Regression Potential]
Low, disable TSO on Ethernet chip will move the TCP segmentation task
to CPU. This increase CPU loading a little bit, and should not introduce
any regression.

=============================

Testing with iperf3 send speed is only 750mbps while receive speed is
normal - 940mbps.

Ubuntu 18.04.1
Msi b250m mortar
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: django 1016 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2018-11-09 (6 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
IwConfig:
 enp0s31f6 no wireless extensions.

 lo no wireless extensions.
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: MSI MS-7A69
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-39-generic root=UUID=991b4393-3308-4615-97c8-9854b3bdc67e ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-39-generic N/A
 linux-backports-modules-4.15.0-39-generic N/A
 linux-firmware 1.173.1
RfKill:

Tags: bionic
Uname: Linux 4.15.0-39-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 06/29/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: A.60
dmi.board.asset.tag: Default string
dmi.board.name: B250M MORTAR ARCTIC (MS-7A69)
dmi.board.vendor: MSI
dmi.board.version: 2.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 2.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrA.60:bd06/29/2018:svnMSI:pnMS-7A69:pvr2.0:rvnMSI:rnB250MMORTARARCTIC(MS-7A69):rvr2.0:cvnMSI:ct3:cvr2.0:
dmi.product.family: Default string
dmi.product.name: MS-7A69
dmi.product.version: 2.0
dmi.sys.vendor: MSI

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