** Also affects: linux-mtk (Ubuntu Jammy) Importance: Undecided Status: New
** Changed in: linux-mtk (Ubuntu Jammy) Assignee: (unassigned) => Jian Hui Lee (jianhuilee) ** Changed in: linux-mtk (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-mtk in Ubuntu. https://bugs.launchpad.net/bugs/2060063 Title: PMU counters for Cortex-A78 not working correctly Status in linux-mtk package in Ubuntu: Invalid Status in linux-mtk source package in Jammy: New Bug description: I am seeing an issue with the Cortex-A78 PMU counters on the Genio1200-evk. Linux perf reports <not counted> for Cortex-A78 PMUs when I run the following commands: taskset -c 7 perf stat -e cycles sleep 5 taskset -c 7 perf stat -r r11 sleep 5 Infact none of the standard PMU events on the Cortex-A78 work when using the raw PMU event register values such as: -e r08 -e r11 -e r13 : ...... etc. I also see this behaviour when an application using libpfm4 OR perf_event_open() API is pinned to one of the 4xCortex-A78 on the board. When I run the above perf commands and applications pinned to the Cortex-A55 cores the PMU events get reported correctly. Please let me know if you need more details. Kind regards, Umair To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-mtk/+bug/2060063/+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