diff options
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r-- | drivers/cpufreq/cpufreq.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 8412ce5f93a7..46a7d62c8174 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -347,6 +347,31 @@ static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci) #endif } +/********************************************************************* + * FREQUENCY INVARIANT CPU CAPACITY * + *********************************************************************/ + +static DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE; + +static void +scale_freq_capacity(struct cpufreq_policy *policy, struct cpufreq_freqs *freqs) +{ + unsigned long cur = freqs ? freqs->new : policy->cur; + unsigned long scale = (cur << SCHED_CAPACITY_SHIFT) / policy->max; + int cpu; + + pr_debug("cpus %*pbl cur/cur max freq %lu/%u kHz freq scale %lu\n", + cpumask_pr_args(policy->cpus), cur, policy->max, scale); + + for_each_cpu(cpu, policy->cpus) + per_cpu(freq_scale, cpu) = scale; +} + +unsigned long cpufreq_scale_freq_capacity(struct sched_domain *sd, int cpu) +{ + return per_cpu(freq_scale, cpu); +} + static void __cpufreq_notify_transition(struct cpufreq_policy *policy, struct cpufreq_freqs *freqs, unsigned int state) { @@ -450,6 +475,8 @@ wait: spin_unlock(&policy->transition_lock); + scale_freq_capacity(policy, freqs); + cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE); } EXPORT_SYMBOL_GPL(cpufreq_freq_transition_begin); @@ -2126,6 +2153,8 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy, blocking_notifier_call_chain(&cpufreq_policy_notifier_list, CPUFREQ_NOTIFY, new_policy); + scale_freq_capacity(new_policy, NULL); + policy->min = new_policy->min; policy->max = new_policy->max; |