Re: "Force HWP min perf before offline" triggers unchecked MSR access errors

From: Qian Cai
Date: Tue Oct 29 2019 - 18:01:36 EST




> On Oct 29, 2019, at 5:47 PM, Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
>
> The MSR_IA32_ENERGY_PERF_BIAS MSR appears to be not present, which
> should be caught by the X86_FEATURE_EPB check in
> intel_pstate_set_epb().
>
> Do you run this in a guest perchance?

No, it is a baremetal HPE server. The dmesg does say something like energy perf bias changed from performance to normal, and the cpuflag contains epb which I thought that would pass the feature check? I could upload the whole dmesg a bit later if that helps.