neowin[.]net/news/windows-11-cpu-usage-reporting-is-apparently-buggy-including-on-task-manager/
CapFrameX [CapFrameX[.]com] discovered a problem with the reported CPU use per core during a test run:
During such a test run, CapFrameX, which developed a useful frametime analysis tool, noticed a weird anomaly when gauging the performance of the Ryzen 7 5800X3D on Lara Croft Shadow of the Tomb Raider (SotTR).The processor usage reported on Windows 11 is seemingly unusually low in one of the scenes in the game which is typically known to be quite intense on the CPU. Only one out the 16 threads seem to be reporting the correct usage whereas all the other threads are under 10% utilization.
While it is possible that the bug noticed here is an application specific issue, CapFrameX insists it is persistent in all games testedIt is noteworthy here that CapFrameX and possibly HWiNFO too is based on the Event tracing for Windows (ETW) tracing mechanism. So it is possible that there is some kind of bug in the ETW which is causing this misreading.
CapFrameX found these results running Win11 22621 -- when the author of the Neowin article checked, Google didn't show anyone else reporting the *same* error, so it's unconfirmed whether this is a problem, as well as if it only effects this most recent build. The free CPUID HWMonitor shows core frequency [MHz] & CPU utilization per thread in case anyone is interested in checking this out on your own PC/laptop.