I have a late 2013 6-cpu Mac Pro running Big Sur. Within the past month or so, I'm getting cpu spikes lasting 5-10 minutes. Activity monitor shows kernel task consuming >800% CPU. I ran spindump and discovered that of 17 seconds (!) of time in kernel task, there were 10 or so threads consuming about 14sec of cpu, with
*319 slave_block + 37 (AppleIntelCPUPowerManagement + 22430) [0xffffff80017ab79e]
in the call stack. All the threads were blocked waiting on machine_switch_context, a couple were in some forced idle call and one looks like it was in some queue wait.
So what's changed over the past couple months? A couple of Big Sur updates, and the addition of MS office software; I really needed ms remote desktop functionality. Also updates from Avid, their bg processes use a lot of resources.
Any ideas or suggestions? It wouldn't break my heart to remove MS if I can find a suitable RDC replacement.
BTW, has anyone noticed the swastika-like nature of the MSRDC icon? Just sayin'