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cpufreq: intel_pstate: report correct CPU frequencies during trace 

The intel_pstate CPU frequency scaling driver has always
calculated CPU frequency incorrectly.  Recent changes have
eliminted most of the issues, however the frequency reported
in the trace buffer, if used, is incorrect.

It remains desireable that cpu->pstate.scaling still be a nice
round number for things such as when setting max and min frequencies.
So the proposal is to just fix the reported frequency in the trace data.

Fixes what remains of [1].

Link: https://bugzilla.kernel.org/show_bug.cgi?id=96521 # [1]
Signed-off-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Doug Smythies 2017-08-08 14:05:12 -07:00 committed by Rafael J. Wysocki
parent aae4e7a8bc
commit c587c79f90
1 changed files with 1 additions and 2 deletions
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3
drivers/cpufreq/intel_pstate.c
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@ -1613,8 +1613,7 @@ static inline bool intel_pstate_sample(struct cpudata *cpu, u64 time)
static inline int32_t get_avg_frequency(struct cpudata *cpu)
{
return mul_ext_fp(cpu->sample.core_avg_perf,
cpu->pstate.max_pstate_physical * cpu->pstate.scaling);
return mul_ext_fp(cpu->sample.core_avg_perf, cpu_khz);
}
static inline int32_t get_avg_pstate(struct cpudata *cpu)