Hi Jörg,
On 05/28/2013 08:02 AM, Jörg Otte wrote:
Hi,
the sysfs-interface of intel_pstate is different to that of the acpi driver:
- intel_pstate shows current cpu-frequency in "cpuinfo_cur_freq" whereas
the acpi counterpart uses "scaling_cur_freq".
- moreover cpuinfo_cur_freq is readable by root only, whereas
scaling_cur_freq is world readable.
A monitoring tool must take care of theese differences.
Is this intentional?
This is a side effect of the interface that intel_pstate presents to the cpufreq
core.
cpuinfo_cur_freq reports the value returned from the scaling driver.
scaling_cur_freq reports the current frequency in the governors policy
structure.
intel_pstate has an internal governor so the core does not try to interpret
the policy structure.
I don't know why cpuinfo_cur_info is read-only root maybe Rafael knows the
history.
Thanks, Jörg
Please CC me in answeres, I'm not subscribed.
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