Created attachment 152067 [details] A modified page which shows the non functioning graphs (This is a 8-core system with 4 cores disabled), also htop which successfully recognized these cores as "offline". SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** STEPS TO REPRODUCE 1. Open a superuser terminal. 2. Set a CPU core offline by entering: "echo 0 > /sys/devices/system/cpu/cpu1/online" (This disables the second core of the CPU) 3. Open System Monitor OBSERVED RESULT All pages except "Processes" stops functioning, components showing blank charts everywhere. Persists after application relaunch. EXPECTED RESULT Components that aren't CPU related keep functioning, while multicore CPU charts should show "Offline" on these cores (or simply hide them from view) SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Fedora Linux 35 (KDE Plasma) x86_64 (available in About System) KDE Plasma Version: 5.25.4 KDE Frameworks Version: 5.96.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION
A possibly relevant merge request was started @ https://invent.kde.org/plasma/ksystemstats/-/merge_requests/42
Git commit fda80732b5953d2b554864d34149966297ebe84d by Arjen Hiemstra. Committed on 11/01/2023 at 11:00. Pushed by ahiemstra into branch 'master'. cpu: Account for offline processors when adding CPU objects Processors can be marked as offline. In that case, they will not be reported by /proc/cpuinfo . However, the processor ID in /proc/stat will account for the missing processor. In that case, we end up trying to perform an out of bounds read on the vector of CPU objects. To account for missing processors, store the CPU objects in a hash rather than a vector so that we can store them based on the actual processor ID. In addition, rework the naming so we report a more proper core name if cores are offline. M +4 -4 plugins/cpu/linuxcpu.cpp M +4 -3 plugins/cpu/linuxcpu.h M +44 -12 plugins/cpu/linuxcpuplugin.cpp M +2 -2 plugins/cpu/linuxcpuplugin.h https://invent.kde.org/plasma/ksystemstats/commit/fda80732b5953d2b554864d34149966297ebe84d