diff options
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 1c7b91c5805b..6c8c897d0a2d 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1232,6 +1232,7 @@ static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu) { struct sample *sample = &cpu->sample; int32_t busy_frac, boost; + int target, avg_pstate; busy_frac = div_fp(sample->mperf, sample->tsc); @@ -1242,7 +1243,26 @@ static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu) busy_frac = boost; sample->busy_scaled = busy_frac * 100; - return get_avg_pstate(cpu) - pid_calc(&cpu->pid, sample->busy_scaled); + + target = limits->no_turbo || limits->turbo_disabled ? + cpu->pstate.max_pstate : cpu->pstate.turbo_pstate; + target += target >> 2; + target = mul_fp(target, busy_frac); + if (target < cpu->pstate.min_pstate) + target = cpu->pstate.min_pstate; + + /* + * If the average P-state during the previous cycle was higher than the + * current target, add 50% of the difference to the target to reduce + * possible performance oscillations and offset possible performance + * loss related to moving the workload from one CPU to another within + * a package/module. + */ + avg_pstate = get_avg_pstate(cpu); + if (avg_pstate > target) + target += (avg_pstate - target) >> 1; + + return target; } static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu) |