int32_t core_pct_busy;
u64 aperf;
u64 mperf;
- unsigned long long tsc;
int freq;
};
u64 prev_aperf;
u64 prev_mperf;
- unsigned long long prev_tsc;
struct sample sample;
};
struct sample *sample)
{
int32_t core_pct;
- int32_t c0_pct;
core_pct = div_fp(int_tofp((sample->aperf)),
int_tofp((sample->mperf)));
core_pct = mul_fp(core_pct, int_tofp(100));
FP_ROUNDUP(core_pct);
- c0_pct = div_fp(int_tofp(sample->mperf), int_tofp(sample->tsc));
-
sample->freq = fp_toint(
mul_fp(int_tofp(cpu->pstate.max_pstate * 1000), core_pct));
- sample->core_pct_busy = mul_fp(core_pct, c0_pct);
+ sample->core_pct_busy = core_pct;
}
static inline void intel_pstate_sample(struct cpudata *cpu)
{
u64 aperf, mperf;
- unsigned long long tsc;
rdmsrl(MSR_IA32_APERF, aperf);
rdmsrl(MSR_IA32_MPERF, mperf);
- tsc = native_read_tsc();
aperf = aperf >> FRAC_BITS;
mperf = mperf >> FRAC_BITS;
- tsc = tsc >> FRAC_BITS;
cpu->sample.aperf = aperf;
cpu->sample.mperf = mperf;
- cpu->sample.tsc = tsc;
cpu->sample.aperf -= cpu->prev_aperf;
cpu->sample.mperf -= cpu->prev_mperf;
- cpu->sample.tsc -= cpu->prev_tsc;
intel_pstate_calc_busy(cpu, &cpu->sample);
cpu->prev_aperf = aperf;
cpu->prev_mperf = mperf;
- cpu->prev_tsc = tsc;
}
static inline void intel_pstate_set_sample_time(struct cpudata *cpu)