** Tags added: amaro oem-priority originate-from-1877239 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 source package in Bionic: In Progress Status in linux source package in Eoan: In Progress Status in linux source package in Focal: In Progress Status in linux-oem-5.6 source package in Focal: In Progress Status in linux source package in Groovy: In Progress Bug description: [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 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 offload 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 To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1802691/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
