Does anyone have issues with turbo unlock and linux kvm VMs? I am running a 2660v3 with a supermicro x10sra8-f-o board. Microcode is removed and loading freecableguys v3x4 rc9 efi driver at boot. I am using this one because it allows uncore to throttle down, which saves me 10W at idle.
In unraid kvm, it locks up the entire system, including the hypervisor. It only seems to lockup when I have a VM active, and the it happens randomly after that. It could be within 30 minutes or several hours later. I got package limit set to c1/c0, c3 and c6 report are disabled. Interesting, according to powertop utility, it says my cores are still idling at c6 even though I have c6 report disabled. Package c state is not at c3 or c6. Even modified the bios with amibcp to have c3 and c6 disabled in the IntelRCSetup menu, but that didn't help. Still showing cores are hitting c6 state, but not package.
In baremetal windows, it is working great. Even with c6 report on, I don't have issues and that helps the cores idle at c6 and saves some watts. Seems to me that if cores are at c6, its fine as long as its not package c state hitting c6. If I disable c6 in bios, in windows it shows cores do not enter c6. So that is different than what I seem to be getting in linux.
I have pinpointed the problem to be related to the no microcode. If I use stock bios, theres no problem. But if I use a bios with removed microcode, I get the problems, even without loading any turbo efi driver. My unraid build has the latest microcode.