** Description changed:
[Impact]
- iperf3 performance is only 70% of 1Gbps (Intel I219-LM [8086:15b7])
-
- [Fix]
- Disable TSO on NIC and offload this task to CPU fix this issue.
+ 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%
-
+ 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
+ [ 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
+ [ 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 offload the TCP segmentation task to
CPU. This increase CPU loading a little bit, and should not introduce any
regression.
+ 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
** Also affects: linux-oem-osp1 (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu Bionic)
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-oem-osp1 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.6 (Ubuntu Bionic)
Importance: Undecided
Status: New
** No longer affects: linux-oem-5.6 (Ubuntu Bionic)
** No longer affects: linux-oem-osp1 (Ubuntu Focal)
** Changed in: linux-oem-osp1 (Ubuntu)
Status: New => Invalid
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => AceLan Kao (acelankao)
** Changed in: linux-oem-osp1 (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux-oem-osp1 (Ubuntu Bionic)
Assignee: (unassigned) => AceLan Kao (acelankao)
--
You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1802691
Title:
Slow send speed with Intel I219-V on Ubuntu 18.04.1
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