Thank you for following up Ody. Last night I was going through the upstream perf code, and I think I found the issue. I suspect it has to do with the commits from the LWN article. I will try to verify today or possibly tomorrow, and update with any progress.
In the meantime, you can try using one of the Ubuntu Mainline builds which likely contain the updated perf tool. Info is available at: https://wiki.ubuntu.com/Kernel/MainlineBuilds But that may introduce other stability issues, so maybe not something to do if you care about stability, but it would work for a quick test. -- 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/2077153 Title: perf c2c record is not working Status in linux package in Ubuntu: New Bug description: For example running $ perf c2c record ls event syntax error: '..em-loads,ldlat=30/P' \___ Bad event or PMU Unable to find PMU or event on a PMU of 'cpu_atom' Initial error: event syntax error: '..em-loads,ldlat=30/P' \___ unknown term 'ldlat' for pmu 'cpu_atom' valid terms: event,pc,edge,inv,umask,cmask,config,config1,config2,config3,name,period,freq,branch_type,time,call-graph,stack-size,no-inherit,inherit,max-stack,nr,no-overwrite,overwrite,driver-config,percore,aux-output,aux-sample-size,metric-id,raw,legacy-cache,hardware Run 'perf list' for a list of valid events Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -e, --event <event> event selector. use 'perf list' to list available events $ perf c2c record -e list ldlat-loads : available ldlat-stores : available $ lsb_release -rd No LSB modules are available. Description: Ubuntu 24.04 LTS Release: 24.04 ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-tools-6.8.0-40-generic 6.8.0-40.40 ProcVersionSignature: Ubuntu 6.8.0-40.40-generic 6.8.12 Uname: Linux 6.8.0-40-generic x86_64 ApportVersion: 2.28.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/seq: gdm 1062 F.... pipewire /dev/snd/controlC0: gdm 1067 F.... wireplumber CRDA: N/A CasperMD5CheckResult: pass Date: Fri Aug 16 08:46:54 2024 InstallationDate: Installed on 2024-08-15 (0 days ago) InstallationMedia: Ubuntu-Server 24.04 LTS "Noble Numbat" - Release amd64 (20240423) Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 26ce:01a2 ASRock LED Controller Bus 001 Device 003: ID 8087:0033 Intel Corp. AX211 Bluetooth Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Lsusb-t: /: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/16p, 480M |__ Port 013: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 014: Dev 003, If 0, Class=Wireless, Driver=btusb, 12M |__ Port 014: Dev 003, If 1, Class=Wireless, Driver=btusb, 12M /: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/9p, 20000M/x2 MachineType: To Be Filled By O.E.M. H670M-ITX/ax ProcEnviron: LANG=en_GB.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-40-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet nohz=on nohz_full=1-5 rcu_nocbs=1-5 isolcpus=1-5 mitigations=off transparent_hugepage=never intel_pstate=disable nosoft lockup irqaffinity=0 processor.max_cstate=1 RelatedPackageVersions: linux-restricted-modules-6.8.0-40-generic N/A linux-backports-modules-6.8.0-40-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/22/2022 dmi.bios.release: 5.25 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: 8.02 dmi.board.name: H670M-ITX/ax dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvr8.02:bd06/22/2022:br5.25:svnToBeFilledByO.E.M.:pnH670M-ITX/ax:pvrToBeFilledByO.E.M.:rvnASRock:rnH670M-ITX/ax:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:skuToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: H670M-ITX/ax dmi.product.sku: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2077153/+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
