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-rw-r--r--drivers/cpufreq/intel_pstate.c45
1 files changed, 8 insertions, 37 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index cc3a8e6c92be..c6e10d02b795 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -48,12 +48,7 @@ static inline int32_t div_fp(int32_t x, int32_t y)
}
struct sample {
- ktime_t start_time;
- ktime_t end_time;
int core_pct_busy;
- int pstate_pct_busy;
- u64 duration_us;
- u64 idletime_us;
u64 aperf;
u64 mperf;
int freq;
@@ -91,8 +86,6 @@ struct cpudata {
int min_pstate_count;
int idle_mode;
- ktime_t prev_sample;
- u64 prev_idle_time_us;
u64 prev_aperf;
u64 prev_mperf;
int sample_ptr;
@@ -450,48 +443,26 @@ static inline void intel_pstate_calc_busy(struct cpudata *cpu,
struct sample *sample)
{
u64 core_pct;
- sample->pstate_pct_busy = 100 - div64_u64(
- sample->idletime_us * 100,
- sample->duration_us);
core_pct = div64_u64(sample->aperf * 100, sample->mperf);
sample->freq = cpu->pstate.max_pstate * core_pct * 1000;
- sample->core_pct_busy = div_s64((sample->pstate_pct_busy * core_pct),
- 100);
+ sample->core_pct_busy = core_pct;
}
static inline void intel_pstate_sample(struct cpudata *cpu)
{
- ktime_t now;
- u64 idle_time_us;
u64 aperf, mperf;
- now = ktime_get();
- idle_time_us = get_cpu_idle_time_us(cpu->cpu, NULL);
-
rdmsrl(MSR_IA32_APERF, aperf);
rdmsrl(MSR_IA32_MPERF, mperf);
- /* for the first sample, don't actually record a sample, just
- * set the baseline */
- if (cpu->prev_idle_time_us > 0) {
- cpu->sample_ptr = (cpu->sample_ptr + 1) % SAMPLE_COUNT;
- cpu->samples[cpu->sample_ptr].start_time = cpu->prev_sample;
- cpu->samples[cpu->sample_ptr].end_time = now;
- cpu->samples[cpu->sample_ptr].duration_us =
- ktime_us_delta(now, cpu->prev_sample);
- cpu->samples[cpu->sample_ptr].idletime_us =
- idle_time_us - cpu->prev_idle_time_us;
-
- cpu->samples[cpu->sample_ptr].aperf = aperf;
- cpu->samples[cpu->sample_ptr].mperf = mperf;
- cpu->samples[cpu->sample_ptr].aperf -= cpu->prev_aperf;
- cpu->samples[cpu->sample_ptr].mperf -= cpu->prev_mperf;
-
- intel_pstate_calc_busy(cpu, &cpu->samples[cpu->sample_ptr]);
- }
+ cpu->sample_ptr = (cpu->sample_ptr + 1) % SAMPLE_COUNT;
+ cpu->samples[cpu->sample_ptr].aperf = aperf;
+ cpu->samples[cpu->sample_ptr].mperf = mperf;
+ cpu->samples[cpu->sample_ptr].aperf -= cpu->prev_aperf;
+ cpu->samples[cpu->sample_ptr].mperf -= cpu->prev_mperf;
+
+ intel_pstate_calc_busy(cpu, &cpu->samples[cpu->sample_ptr]);
- cpu->prev_sample = now;
- cpu->prev_idle_time_us = idle_time_us;
cpu->prev_aperf = aperf;
cpu->prev_mperf = mperf;
}