> On Jan 17, 2020, at 7:21 AM, Krzysztof Piecuch <piecuch@xxxxxxxxxxxxxx> wrote: > > Changing base clock frequency directly impacts tsc hz but not CPUID.16h > values. An overclocked CPU supporting CPUID.16h and partial CPUID.15h > support will set tsc hz according to "best guess" given by CPUID.16h > relying on tsc_refine_calibration_work to give better numbers later. > tsc_refine_calibration_work will refuse to do its work when the outcome is > off the early tsc hz value by more than 1% which is certain to happen on an > overclocked system. > Wouldn’t it be better to have an option tsc_max_refinement= to increase the 1%?
