Gergő Sályi 24a9886952 Handle offline CPUs and CPU hotplug ...

First of all in case when the number CPUs change
prevent out-of-bound index access in
waybar::modules::CpuUsage::getCpuUsage()

Secondly on Linux when updating CPU usage
read /sys/devices/system/cpu/present
and use it to detect the offline CPUs missing from /proc/stat

For offline CPUs report 0 usage and "offline" in the tooltip

Fixes issue #3498

On Linux one can test this functionality with:
echo 0 > /sys/devices/system/cpu/cpu1/online
echo 1 > /sys/devices/system/cpu/cpu1/online

On non-Linux OSes I'm not sure how to detect offline CPUs,
so I didn't add the offline CPU detection there
but at least CPU number change should not cause a crash there anymore
or cause memory safety issues after this fix

2024-08-02 17:32:07 +02:00

..

bsd.cpp

cpu_usage: Fix ScopeGuard renaming in bsd-only file

2023-10-26 17:30:48 +02:00

common.cpp

Handle offline CPUs and CPU hotplug

2024-08-02 17:32:07 +02:00

linux.cpp

Handle offline CPUs and CPU hotplug

2024-08-02 17:32:07 +02:00