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| author | Doug Smythies <doug.smythies@gmail.com> | 2017-08-08 23:05:12 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-08-11 01:25:53 +0200 |
| commit | c587c79f90632df59c61383c6abebb2e07a81911 (patch) | |
| tree | 71e8938a77a416661fe6544abd282a964601fda1 /drivers/cpufreq | |
| parent | Linux 4.13-rc4 (diff) | |
| download | linux-c587c79f90632df59c61383c6abebb2e07a81911.tar.xz linux-c587c79f90632df59c61383c6abebb2e07a81911.zip | |
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>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 0566455f233e..65ee4fcace1f 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -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) |