diff options
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index b46fc7054831..0102c3e1441f 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -982,6 +982,7 @@ static int hybrid_get_cost(struct device *dev, unsigned long freq, unsigned long *cost) { struct pstate_data *pstate = &all_cpu_data[dev->id]->pstate; + struct cpu_cacheinfo *cacheinfo = get_cpu_cacheinfo(dev->id); /* * The smaller the perf-to-frequency scaling factor, the larger the IPC @@ -994,6 +995,22 @@ static int hybrid_get_cost(struct device *dev, unsigned long freq, * of the same type in different "utilization bins" is different. */ *cost = div_u64(100ULL * INTEL_PSTATE_CORE_SCALING, pstate->scaling) + freq; + /* + * Increase the cost slightly for CPUs able to access L3 to avoid + * touching it in case some other CPUs of the same type can do the work + * without it. + */ + if (cacheinfo) { + unsigned int i; + + /* Check if L3 cache is there. */ + for (i = 0; i < cacheinfo->num_leaves; i++) { + if (cacheinfo->info_list[i].level == 3) { + *cost += 2; + break; + } + } + } return 0; } |