Working and testing if the kernel livepatch theory that Kprobe registers as a ftrace handler could be the cause of the problem. But my old I5 is making this process difficult.
-- 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/1973434 Title: massive performance issues since 22.04 upgrade Status in linux package in Ubuntu: Confirmed Bug description: Hi, After upgrading to 22.04 i had to fight with massive performance issues. Browsers appeared to hang every other minute, youtube videos being laggy and hang in between, applications in a virtualbox VM where slow and also hanging every other minute to a level of not being useable. On a pretty recent and powerful system just 2 years old. I noticed CPU jumps in top, but also somehow thought it could be a graphics issue so invested some time installing nvidia drivers properly. Also I wondered if it might be the lowlatency kernel I normally use because I do audio stuff, and switched to generic. But nothing helped. ThenI had the idea it could be a kernel/scheduler issue because the system wasn't always slow, but it appeared certain things kept hanging when other processed had a lot of cpu for a few seconds. So I got a recent mainline kernel, configured it with my last running config from 21.10 before the update, made the debs and installed them, and now can tell that a mainline kernel 5.17.7 with all the dkms modules that i had before which got compiled automatically at installation brings back a "normal" performance. I can browse the web, run multiple youtube vids at once, even in another browser, have thunderbird running, and a virtualbox machine open with another browser for some web app testing and everything runs fine and smooth, no lagging. Not sure yet what the real reason is - either the kernel version, or a patch in the ubuntu version, or the 22.04 kernel config so far, or some configuration made in 21.10 that isn't good with 22.04 and it's kernel anymore. I will go ahead tomorrow and see if I can build a vanilla kernel with the config from the ubuntu 22.04 kernel and "make oldconfig", then I will be able to tell if only the config is making the difference. Please let me know of there is anything I should test to further analyze this issue, or any ideas I can try to solve it without having to run a mainline manually installed kernel. Thanks. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: linux-image-generic 5.15.0.30.33 ProcVersionSignature: Ubuntu 5.15.0-30.31-generic 5.15.30 Uname: Linux 5.15.0-30-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu82 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: henning 6198 F.... pulseaudio /dev/snd/controlC1: henning 6198 F.... pulseaudio CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Sat May 14 23:02:38 2022 InstallationDate: Installed on 2020-04-12 (761 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) MachineType: LENOVO 20QV00CEGE ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-30-generic root=/dev/mapper/vgubuntu-root ro RelatedPackageVersions: linux-restricted-modules-5.15.0-30-generic N/A linux-backports-modules-5.15.0-30-generic N/A linux-firmware 20220329.git681281e4-0ubuntu3 SourcePackage: linux UpgradeStatus: Upgraded to jammy on 2022-04-28 (15 days ago) dmi.bios.date: 12/06/2021 dmi.bios.release: 1.42 dmi.bios.vendor: LENOVO dmi.bios.version: N2OET55W (1.42 ) dmi.board.asset.tag: Not Available dmi.board.name: 20QV00CEGE dmi.board.vendor: LENOVO dmi.board.version: SDK0T08861 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.23 dmi.modalias: dmi:bvnLENOVO:bvrN2OET55W(1.42):bd12/06/2021:br1.42:efr1.23:svnLENOVO:pn20QV00CEGE:pvrThinkPadX1Extreme2nd:rvnLENOVO:rn20QV00CEGE:rvrSDK0T08861WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20QV_BU_Think_FM_ThinkPadX1Extreme2nd: dmi.product.family: ThinkPad X1 Extreme 2nd dmi.product.name: 20QV00CEGE dmi.product.sku: LENOVO_MT_20QV_BU_Think_FM_ThinkPad X1 Extreme 2nd dmi.product.version: ThinkPad X1 Extreme 2nd dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1973434/+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
