apport information ** Tags added: apport-collected uec-images
** Description changed: Utilizing kvms with ubuntu we face this inconsistent issue where an instance only uses a single rx queue (4 vCPUs): ethtool -S ens7 | egrep 'rx-.\.|rx_discards: ' rx_discards: 0 rx-0.packets: 2653705823 rx-0.bytes: 561319217396 rx-1.packets: 0 rx-1.bytes: 0 rx-2.packets: 0 rx-2.bytes: 0 rx-3.packets: 0 rx-3.bytes: 0 building another identical instances however sometimes works on all 4 (4 vCPUs): ethtool -S ens6 | egrep 'rx-.\.|rx_discards: ' rx_discards: 0 rx-0.packets: 234661700 rx-0.bytes: 49678565503 rx-1.packets: 231886603 rx-1.bytes: 49022714157 rx-2.packets: 232424910 rx-2.bytes: 49313057910 rx-3.packets: 235776722 rx-3.bytes: 49863841179 Applying the following workaround to the non-working instance: ethtool -L ens7 combined 2 ethtool -L ens7 combined 4 makes all RSS queues work properly (4). This looks like a race condition during boot or a kernel bug. The kernel used during the tests is: 5.4.0-81-generic #91-Ubuntu SMP Thu Jul 15 19:09:17 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux + --- + ProblemType: Bug + AlsaDevices: + total 0 + crw-rw---- 1 root audio 116, 1 Aug 24 13:23 seq + crw-rw---- 1 root audio 116, 33 Aug 24 13:23 timer + AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' + ApportVersion: 2.20.11-0ubuntu27.18 + 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: N/A + CasperMD5CheckResult: skip + DistroRelease: Ubuntu 20.04 + IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' + Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub + Lsusb-t: /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M + MachineType: OpenStack Foundation OpenStack Nova + Package: linux (not installed) + PciMultimedia: + + ProcEnviron: + TERM=vt220 + PATH=(custom, no user) + LANG=C.UTF-8 + SHELL=/bin/bash + ProcFB: + + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-81-generic root=UUID=c77fa46f-24bd-4fdb-8dd9-a1d1a98b3ecf ro console=tty1 console=ttyS0 + ProcVersionSignature: Ubuntu 5.4.0-81.91-generic 5.4.128 + RelatedPackageVersions: + linux-restricted-modules-5.4.0-81-generic N/A + linux-backports-modules-5.4.0-81-generic N/A + linux-firmware N/A + RfKill: Error: [Errno 2] No such file or directory: 'rfkill' + Tags: focal uec-images + Uname: Linux 5.4.0-81-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: N/A + _MarkForUpload: True + dmi.bios.date: 04/01/2014 + dmi.bios.vendor: SeaBIOS + dmi.bios.version: 1.10.2-1ubuntu1 + dmi.chassis.type: 1 + dmi.chassis.vendor: QEMU + dmi.chassis.version: pc-i440fx-4.2 + dmi.modalias: dmi:bvnSeaBIOS:bvr1.10.2-1ubuntu1:bd04/01/2014:svnOpenStackFoundation:pnOpenStackNova:pvr21.2.0:cvnQEMU:ct1:cvrpc-i440fx-4.2: + dmi.product.family: Virtual Machine + dmi.product.name: OpenStack Nova + dmi.product.version: 21.2.0 + dmi.sys.vendor: OpenStack Foundation ** Attachment added: "CurrentDmesg.txt" https://bugs.launchpad.net/bugs/1940928/+attachment/5520407/+files/CurrentDmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1940928 Title: Inconsistent behavior in NIC RSS queue loading To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1940928/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
