Messages in this thread | | | Date | Wed, 3 Jun 2020 11:40:17 +0100 | From | Sudeep Holla <> | Subject | Re: [Question]: about 'cpuinfo_cur_freq' shown in sysfs when the CPU is in idle state |
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On Wed, Jun 03, 2020 at 03:51:59PM +0530, Viresh Kumar wrote: > On 03-06-20, 11:17, Sudeep Holla wrote: > > On Wed, Jun 03, 2020 at 03:40:10PM +0530, Viresh Kumar wrote: > > > On 03-06-20, 11:07, Sudeep Holla wrote: > > > > But I have another question. If we can detect that CPPC on some platforms > > > > rely on CPU registers(I assume FFH registers here and not system/io/... > > > > type of GAS registers), can we set dvfs_on_any_cpu(can't recall exact > > > > flag name) to false if not already done to prevent such issues. Or I am > > > > talking non-sense as it may be applicable only for _set operation and > > > > > > Yes, non-sense :) > > > > > > > Thanks for confirming 👍. > > Hehe. > > So, do you agree that we better do the read from the CPUs themselves ? >
Yes if that is fine. I thought waking up the core was not a good solution in terms of power, but I have no objection for that as well as return 0 as IMO it aligns with the AMU counters when CPU is idle.
-- Regards, Sudeep
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