Hi, I am not really an intel-pstate driver guy, just wrote the patch based on software-review of the stuff :)
On 22-02-16, 10:17, Chen, Yu C wrote: > IIRC, > 1.HWP is hardwarely per-package, CPUs inside one package have one shared HWP. > 2.Currently all the CPUs share the same HWP settings according to > intel_pstate design. > 3. The policy is per-cpu in intel_pstate driver.(policy->cpus only contains > one cpu) > > So with this patch applied, it is likely CPUs may have different HWP > settings? I think the hardware should be able to cope with that, and should be selecting the frequency based on the highest frequency requested for the same package. Otherwise, why should there be an option to supply per-cpu settings ? > For example: > CPU 0 belongs to package A with policy 0, and CPU 1 belongs to package B with > policy 1, > If you change the policy 0 from powersave to performance, then only CPU0 will > update its > min/max freq in HWP, however we should also update CPU 2's min/max in HWP > settings? > Plz correct me if I'm wrong.. I will let the official intel-pstate guys reply to that. -- viresh
