/* * drivers/cpufreq/cpufreq_hotplug.c * * Copyright (C) 2001 Russell King * (C) 2003 Venkatesh Pallipadi . * Jun Nakajima * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern unsigned int get_normal_max_freq(void); extern unsigned int mt_dvfs_power_dispatch_safe(void); extern int mt_gpufreq_target(int idx); /* * dbs is used in this file as a shortform for demandbased switching * It helps to keep variable names smaller, simpler */ #define DEF_FREQUENCY_DOWN_DIFFERENTIAL (10) #define DEF_FREQUENCY_OD_THRESHOLD (98) #define DEF_FREQUENCY_UP_THRESHOLD (80) #define DEF_SAMPLING_DOWN_FACTOR (1) #define MAX_SAMPLING_DOWN_FACTOR (100000) #define MICRO_FREQUENCY_DOWN_DIFFERENTIAL (15) #define MIN_FREQUENCY_DOWN_DIFFERENTIAL (5) #define MAX_FREQUENCY_DOWN_DIFFERENTIAL (20) #define MICRO_FREQUENCY_UP_THRESHOLD (85) #define MICRO_FREQUENCY_MIN_SAMPLE_RATE (30000) #define MIN_FREQUENCY_UP_THRESHOLD (21) #define MAX_FREQUENCY_UP_THRESHOLD (100) #define DEF_CPU_DOWN_DIFFERENTIAL (10) #define MICRO_CPU_DOWN_DIFFERENTIAL (10) #define MIN_CPU_DOWN_DIFFERENTIAL (0) #define MAX_CPU_DOWN_DIFFERENTIAL (30) #define DEF_CPU_UP_THRESHOLD (90) #define MICRO_CPU_UP_THRESHOLD (90) #define MIN_CPU_UP_THRESHOLD (80) #define MAX_CPU_UP_THRESHOLD (100) #define CPU_UP_AVG_TIMES (10) #define CPU_DOWN_AVG_TIMES (50) #define THERMAL_DISPATCH_AVG_TIMES (30) #define DEF_CPU_PERSIST_COUNT (10) //#define DEBUG_LOG #define INPUT_BOOST (1) /* * The polling frequency of this governor depends on the capability of * the processor. Default polling frequency is 1000 times the transition * latency of the processor. The governor will work on any processor with * transition latency <= 10mS, using appropriate sampling * rate. * For CPUs with transition latency > 10mS (mostly drivers with CPUFREQ_ETERNAL) * this governor will not work. * All times here are in uS. */ #define MIN_SAMPLING_RATE_RATIO (2) static unsigned int min_sampling_rate; #define LATENCY_MULTIPLIER (1000) #define MIN_LATENCY_MULTIPLIER (100) #define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000) static void do_dbs_timer(struct work_struct *work); static int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event); #ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_BALANCE static #endif struct cpufreq_governor cpufreq_gov_balance = { .name = "hotplug", .governor = cpufreq_governor_dbs, .max_transition_latency = TRANSITION_LATENCY_LIMIT, .owner = THIS_MODULE, }; #ifdef CONFIG_SMP static int g_next_hp_action = 0; static long g_cpu_up_sum_load = 0; static int g_cpu_up_count = 0; static long g_cpu_down_sum_load = 0; static int g_cpu_down_count = 0; static int g_max_cpu_persist_count = 0; static int g_thermal_count = 0; static void hp_work_handler(struct work_struct *work); static struct delayed_work hp_work; #if INPUT_BOOST static struct task_struct *freq_up_task; #endif #endif static int cpu_loading = 0; static int cpus_sum_load = 0; /* Sampling types */ enum {DBS_NORMAL_SAMPLE, DBS_SUB_SAMPLE}; struct cpu_dbs_info_s { cputime64_t prev_cpu_idle; cputime64_t prev_cpu_iowait; cputime64_t prev_cpu_wall; cputime64_t prev_cpu_nice; struct cpufreq_policy *cur_policy; struct delayed_work work; struct cpufreq_frequency_table *freq_table; unsigned int freq_lo; unsigned int freq_lo_jiffies; unsigned int freq_hi_jiffies; unsigned int rate_mult; int cpu; unsigned int sample_type:1; /* * percpu mutex that serializes governor limit change with * do_dbs_timer invocation. We do not want do_dbs_timer to run * when user is changing the governor or limits. */ struct mutex timer_mutex; }; static DEFINE_PER_CPU(struct cpu_dbs_info_s, hp_cpu_dbs_info); static unsigned int dbs_enable; /* number of CPUs using this policy */ static unsigned int dbs_ignore = 1; static unsigned int dbs_thermal_limited; static unsigned int dbs_thermal_limited_freq; /* dvfs thermal limit */ void dbs_freq_thermal_limited(unsigned int limited, unsigned int freq) { dbs_thermal_limited = limited; dbs_thermal_limited_freq = freq; } EXPORT_SYMBOL(dbs_freq_thermal_limited); /* * dbs_mutex protects dbs_enable in governor start/stop. */ static DEFINE_MUTEX(dbs_mutex); /* * dbs_hotplug protects all hotplug related global variables */ static DEFINE_MUTEX(hp_mutex); DEFINE_MUTEX(bl_onoff_mutex); static struct dbs_tuners { unsigned int sampling_rate; unsigned int od_threshold; unsigned int up_threshold; unsigned int down_differential; unsigned int ignore_nice; unsigned int sampling_down_factor; unsigned int powersave_bias; unsigned int io_is_busy; unsigned int cpu_up_threshold; unsigned int cpu_down_differential; unsigned int cpu_up_avg_times; unsigned int cpu_down_avg_times; unsigned int thermal_dispatch_avg_times; unsigned int cpu_num_limit; unsigned int cpu_num_base; unsigned int is_cpu_hotplug_disable; #if INPUT_BOOST unsigned int cpu_input_boost_enable; #endif } dbs_tuners_ins = { .od_threshold = DEF_FREQUENCY_OD_THRESHOLD, .up_threshold = DEF_FREQUENCY_UP_THRESHOLD, .sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR, .down_differential = DEF_FREQUENCY_DOWN_DIFFERENTIAL, .ignore_nice = 0, .powersave_bias = 0, .cpu_up_threshold = DEF_CPU_UP_THRESHOLD, .cpu_down_differential = DEF_CPU_DOWN_DIFFERENTIAL, .cpu_up_avg_times = CPU_UP_AVG_TIMES, .cpu_down_avg_times = CPU_DOWN_AVG_TIMES, .thermal_dispatch_avg_times = THERMAL_DISPATCH_AVG_TIMES, .cpu_num_limit = 1, .cpu_num_base = 1, .is_cpu_hotplug_disable = 1, #if INPUT_BOOST .cpu_input_boost_enable = 1, #endif }; static void dbs_freq_increase(struct cpufreq_policy *p, unsigned int freq); static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall) { u64 idle_time; u64 cur_wall_time; u64 busy_time; cur_wall_time = jiffies64_to_cputime64(get_jiffies_64()); busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER]; busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM]; busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ]; busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ]; busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL]; busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE]; idle_time = cur_wall_time - busy_time; if (wall) *wall = jiffies_to_usecs(cur_wall_time); return jiffies_to_usecs(idle_time); } /* static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall) */ /* { */ /* u64 idle_time = get_cpu_idle_time_us(cpu, NULL); */ /* if (idle_time == -1ULL) */ /* return get_cpu_idle_time_jiffy(cpu, wall); */ /* else */ /* idle_time += get_cpu_iowait_time_us(cpu, wall); */ /* return idle_time; */ /* } */ static inline cputime64_t get_cpu_iowait_time(unsigned int cpu, cputime64_t *wall) { u64 iowait_time = get_cpu_iowait_time_us(cpu, wall); if (iowait_time == -1ULL) return 0; return iowait_time; } void force_two_core(void) { bool raise_freq = false; mutex_lock(&hp_mutex); g_cpu_down_count = 0; g_cpu_down_sum_load = 0; if (num_online_cpus() < dbs_tuners_ins.cpu_num_limit) { raise_freq = true; g_next_hp_action = 1; schedule_delayed_work_on(0, &hp_work, 0); } mutex_unlock(&hp_mutex); if (raise_freq == true) { wake_up_process(freq_up_task); } mt_gpufreq_target(0); } /* * Find right freq to be set now with powersave_bias on. * Returns the freq_hi to be used right now and will set freq_hi_jiffies, * freq_lo, and freq_lo_jiffies in percpu area for averaging freqs. */ static unsigned int powersave_bias_target(struct cpufreq_policy *policy, unsigned int freq_next, unsigned int relation) { unsigned int freq_req, freq_reduc, freq_avg; unsigned int freq_hi, freq_lo; unsigned int index = 0; unsigned int jiffies_total, jiffies_hi, jiffies_lo; struct cpu_dbs_info_s *dbs_info = &per_cpu(hp_cpu_dbs_info, policy->cpu); if (!dbs_info->freq_table) { dbs_info->freq_lo = 0; dbs_info->freq_lo_jiffies = 0; return freq_next; } cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_next, relation, &index); freq_req = dbs_info->freq_table[index].frequency; freq_reduc = freq_req * dbs_tuners_ins.powersave_bias / 1000; freq_avg = freq_req - freq_reduc; /* Find freq bounds for freq_avg in freq_table */ index = 0; cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg, CPUFREQ_RELATION_H, &index); freq_lo = dbs_info->freq_table[index].frequency; index = 0; cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg, CPUFREQ_RELATION_L, &index); freq_hi = dbs_info->freq_table[index].frequency; /* Find out how long we have to be in hi and lo freqs */ if (freq_hi == freq_lo) { dbs_info->freq_lo = 0; dbs_info->freq_lo_jiffies = 0; return freq_lo; } jiffies_total = usecs_to_jiffies(dbs_tuners_ins.sampling_rate); jiffies_hi = (freq_avg - freq_lo) * jiffies_total; jiffies_hi += ((freq_hi - freq_lo) / 2); jiffies_hi /= (freq_hi - freq_lo); jiffies_lo = jiffies_total - jiffies_hi; dbs_info->freq_lo = freq_lo; dbs_info->freq_lo_jiffies = jiffies_lo; dbs_info->freq_hi_jiffies = jiffies_hi; return freq_hi; } static void hotplug_powersave_bias_init_cpu(int cpu) { struct cpu_dbs_info_s *dbs_info = &per_cpu(hp_cpu_dbs_info, cpu); dbs_info->freq_table = cpufreq_frequency_get_table(cpu); dbs_info->freq_lo = 0; } static void hotplug_powersave_bias_init(void) { int i; for_each_online_cpu(i) { hotplug_powersave_bias_init_cpu(i); } } /************************** sysfs interface ************************/ static ssize_t show_sampling_rate_min(struct kobject *kobj, struct attribute *attr, char *buf) { return sprintf(buf, "%u\n", min_sampling_rate); } define_one_global_ro(sampling_rate_min); /* cpufreq_hotplug Governor Tunables */ #define show_one(file_name, object) \ static ssize_t show_##file_name \ (struct kobject *kobj, struct attribute *attr, char *buf) \ { \ return sprintf(buf, "%u\n", dbs_tuners_ins.object); \ } show_one(sampling_rate, sampling_rate); show_one(io_is_busy, io_is_busy); show_one(up_threshold, up_threshold); show_one(od_threshold, od_threshold); show_one(down_differential, down_differential); show_one(sampling_down_factor, sampling_down_factor); show_one(ignore_nice_load, ignore_nice); show_one(powersave_bias, powersave_bias); show_one(cpu_up_threshold, cpu_up_threshold); show_one(cpu_down_differential, cpu_down_differential); show_one(cpu_up_avg_times, cpu_up_avg_times); show_one(cpu_down_avg_times, cpu_down_avg_times); show_one(thermal_dispatch_avg_times, thermal_dispatch_avg_times); show_one(cpu_num_limit, cpu_num_limit); show_one(cpu_num_base, cpu_num_base); show_one(is_cpu_hotplug_disable, is_cpu_hotplug_disable); #if INPUT_BOOST show_one(cpu_input_boost_enable, cpu_input_boost_enable); #endif /** * update_sampling_rate - update sampling rate effective immediately if needed. * @new_rate: new sampling rate * * If new rate is smaller than the old, simply updaing * dbs_tuners_int.sampling_rate might not be appropriate. For example, * if the original sampling_rate was 1 second and the requested new sampling * rate is 10 ms because the user needs immediate reaction from hotplug * governor, but not sure if higher frequency will be required or not, * then, the governor may change the sampling rate too late; up to 1 second * later. Thus, if we are reducing the sampling rate, we need to make the * new value effective immediately. */ static void update_sampling_rate(unsigned int new_rate) { int cpu; dbs_tuners_ins.sampling_rate = new_rate = max(new_rate, min_sampling_rate); for_each_online_cpu(cpu) { struct cpufreq_policy *policy; struct cpu_dbs_info_s *dbs_info; unsigned long next_sampling, appointed_at; policy = cpufreq_cpu_get(cpu); if (!policy) continue; dbs_info = &per_cpu(hp_cpu_dbs_info, policy->cpu); cpufreq_cpu_put(policy); mutex_lock(&dbs_info->timer_mutex); if (!delayed_work_pending(&dbs_info->work)) { mutex_unlock(&dbs_info->timer_mutex); continue; } next_sampling = jiffies + usecs_to_jiffies(new_rate); appointed_at = dbs_info->work.timer.expires; if (time_before(next_sampling, appointed_at)) { mutex_unlock(&dbs_info->timer_mutex); cancel_delayed_work_sync(&dbs_info->work); mutex_lock(&dbs_info->timer_mutex); schedule_delayed_work_on(dbs_info->cpu, &dbs_info->work, usecs_to_jiffies(new_rate)); } mutex_unlock(&dbs_info->timer_mutex); } } void bl_enable_timer(int enable) { static unsigned int sampling_rate_backup = 0; if (enable && !sampling_rate_backup) return; if (enable) update_sampling_rate(sampling_rate_backup); else { struct cpufreq_policy *policy; struct cpu_dbs_info_s *dbs_info; unsigned int new_rate = 30000 * 100; // change to 3s /* restore original sampling rate */ sampling_rate_backup = dbs_tuners_ins.sampling_rate; update_sampling_rate(new_rate); policy = cpufreq_cpu_get(0); if (!policy) return; dbs_info = &per_cpu(hp_cpu_dbs_info, 0); cpufreq_cpu_put(policy); mutex_lock(&dbs_info->timer_mutex); if (!delayed_work_pending(&dbs_info->work)) { mutex_unlock(&dbs_info->timer_mutex); return; } mutex_unlock(&dbs_info->timer_mutex); cancel_delayed_work_sync(&dbs_info->work); mutex_lock(&dbs_info->timer_mutex); schedule_delayed_work_on(dbs_info->cpu, &dbs_info->work, usecs_to_jiffies(new_rate)); mutex_unlock(&dbs_info->timer_mutex); } } EXPORT_SYMBOL(bl_enable_timer); static ssize_t store_sampling_rate(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1) return -EINVAL; update_sampling_rate(input); return count; } static ssize_t store_io_is_busy(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1) return -EINVAL; dbs_tuners_ins.io_is_busy = !!input; return count; } static ssize_t store_up_threshold(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1 || input > MAX_FREQUENCY_UP_THRESHOLD || input < MIN_FREQUENCY_UP_THRESHOLD) { return -EINVAL; } dbs_tuners_ins.up_threshold = input; return count; } static ssize_t store_od_threshold(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1 || input > MAX_FREQUENCY_UP_THRESHOLD || input < MIN_FREQUENCY_UP_THRESHOLD) { return -EINVAL; } dbs_tuners_ins.od_threshold = input; return count; } static ssize_t store_down_differential(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1 || input > MAX_FREQUENCY_DOWN_DIFFERENTIAL || input < MIN_FREQUENCY_DOWN_DIFFERENTIAL) { return -EINVAL; } dbs_tuners_ins.down_differential = input; return count; } static ssize_t store_sampling_down_factor(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input, j; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1 || input > MAX_SAMPLING_DOWN_FACTOR || input < 1) return -EINVAL; dbs_tuners_ins.sampling_down_factor = input; /* Reset down sampling multiplier in case it was active */ for_each_online_cpu(j) { struct cpu_dbs_info_s *dbs_info; dbs_info = &per_cpu(hp_cpu_dbs_info, j); dbs_info->rate_mult = 1; } return count; } static ssize_t store_ignore_nice_load(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; unsigned int j; ret = sscanf(buf, "%u", &input); if (ret != 1) return -EINVAL; if (input > 1) input = 1; if (input == dbs_tuners_ins.ignore_nice) { /* nothing to do */ return count; } dbs_tuners_ins.ignore_nice = input; /* we need to re-evaluate prev_cpu_idle */ for_each_online_cpu(j) { struct cpu_dbs_info_s *dbs_info; dbs_info = &per_cpu(hp_cpu_dbs_info, j); dbs_info->prev_cpu_idle = get_cpu_idle_time(j, &dbs_info->prev_cpu_wall, dbs_tuners_ins.io_is_busy); if (dbs_tuners_ins.ignore_nice) dbs_info->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE]; } return count; } static ssize_t store_powersave_bias(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1) return -EINVAL; if (input > 1000) input = 1000; dbs_tuners_ins.powersave_bias = input; hotplug_powersave_bias_init(); return count; } static ssize_t store_cpu_up_threshold(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1 || input > MAX_CPU_UP_THRESHOLD || input < MIN_CPU_UP_THRESHOLD) { return -EINVAL; } dbs_tuners_ins.cpu_up_threshold = input; return count; } static ssize_t store_cpu_down_differential(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1 || input > MAX_CPU_DOWN_DIFFERENTIAL || input < MIN_CPU_DOWN_DIFFERENTIAL) { return -EINVAL; } dbs_tuners_ins.cpu_down_differential = input; return count; } static ssize_t store_cpu_up_avg_times(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); dbs_tuners_ins.cpu_up_avg_times = input; return count; } static ssize_t store_cpu_down_avg_times(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); dbs_tuners_ins.cpu_down_avg_times = input; return count; } static ssize_t store_thermal_dispatch_avg_times(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); dbs_tuners_ins.thermal_dispatch_avg_times = input; return count; } static ssize_t store_cpu_num_limit(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); dbs_tuners_ins.cpu_num_limit = input; return count; } static ssize_t store_cpu_num_base(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; bool raise_freq = false; int ret; struct cpufreq_policy *policy; policy = cpufreq_cpu_get(0); ret = sscanf(buf, "%u", &input); dbs_tuners_ins.cpu_num_base = input; mutex_lock(&hp_mutex); if (num_online_cpus() < dbs_tuners_ins.cpu_num_base && num_online_cpus() < dbs_tuners_ins.cpu_num_limit) { raise_freq = true; g_next_hp_action = 1; schedule_delayed_work_on(0, &hp_work, 0); } mutex_unlock(&hp_mutex); if(raise_freq == true) dbs_freq_increase(policy, policy->max); return count; } static ssize_t store_is_cpu_hotplug_disable(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); dbs_tuners_ins.is_cpu_hotplug_disable = input; return count; } #if INPUT_BOOST static ssize_t store_cpu_input_boost_enable(struct kobject *a, struct attribute *b, const char *buf, size_t count) { unsigned int input; int ret; ret = sscanf(buf, "%u", &input); if (ret != 1 || input > 1 || input < 0) { return -EINVAL; } mutex_lock(&hp_mutex); dbs_tuners_ins.cpu_input_boost_enable = input; mutex_unlock(&hp_mutex); return count; } #endif define_one_global_rw(sampling_rate); define_one_global_rw(io_is_busy); define_one_global_rw(up_threshold); define_one_global_rw(od_threshold); define_one_global_rw(down_differential); define_one_global_rw(sampling_down_factor); define_one_global_rw(ignore_nice_load); define_one_global_rw(powersave_bias); define_one_global_rw(cpu_up_threshold); define_one_global_rw(cpu_down_differential); define_one_global_rw(cpu_up_avg_times); define_one_global_rw(cpu_down_avg_times); define_one_global_rw(thermal_dispatch_avg_times); define_one_global_rw(cpu_num_limit); define_one_global_rw(cpu_num_base); define_one_global_rw(is_cpu_hotplug_disable); #if INPUT_BOOST define_one_global_rw(cpu_input_boost_enable); #endif static struct attribute *dbs_attributes[] = { &sampling_rate_min.attr, &sampling_rate.attr, &up_threshold.attr, &od_threshold.attr, &down_differential.attr, &sampling_down_factor.attr, &ignore_nice_load.attr, &powersave_bias.attr, &io_is_busy.attr, &cpu_up_threshold.attr, &cpu_down_differential.attr, &cpu_up_avg_times.attr, &cpu_down_avg_times.attr, &thermal_dispatch_avg_times.attr, &cpu_num_limit.attr, &cpu_num_base.attr, &is_cpu_hotplug_disable.attr, #if INPUT_BOOST &cpu_input_boost_enable.attr, #endif NULL }; static struct attribute_group dbs_attr_group = { .attrs = dbs_attributes, .name = "hotplug", }; /************************** sysfs end ************************/ static void dbs_freq_increase(struct cpufreq_policy *p, unsigned int freq) { if (dbs_tuners_ins.powersave_bias) freq = powersave_bias_target(p, freq, CPUFREQ_RELATION_H); else if (p->cur == p->max) { if (dbs_ignore == 0) dbs_ignore = 1; else return; } __cpufreq_driver_target(p, freq, dbs_tuners_ins.powersave_bias ? CPUFREQ_RELATION_L : CPUFREQ_RELATION_H); } int mt_cpufreq_cur_load(void) { return cpu_loading; } EXPORT_SYMBOL(mt_cpufreq_cur_load); void hp_set_dynamic_cpu_hotplug_enable(int enable) { mutex_lock(&hp_mutex); dbs_tuners_ins.is_cpu_hotplug_disable = !enable; mutex_unlock(&hp_mutex); } EXPORT_SYMBOL(hp_set_dynamic_cpu_hotplug_enable); void hp_limited_cpu_num(int num) { mutex_lock(&hp_mutex); dbs_tuners_ins.cpu_num_limit = num; if (num < num_online_cpus()) { printk("%s: CPU off due to thermal protection! limit_num = %d < online = %d\n", __func__, num, num_online_cpus()); g_next_hp_action = 0; schedule_delayed_work_on(0, &hp_work, 0); g_cpu_down_count = 0; g_cpu_down_sum_load = 0; } mutex_unlock(&hp_mutex); } EXPORT_SYMBOL(hp_limited_cpu_num); void hp_based_cpu_num(int num) { mutex_lock(&hp_mutex); dbs_tuners_ins.cpu_num_base = num; mutex_unlock(&hp_mutex); } EXPORT_SYMBOL(hp_based_cpu_num); #ifdef CONFIG_SMP static void hp_work_handler(struct work_struct *work) { if (mutex_trylock(&bl_onoff_mutex)) { if (!dbs_tuners_ins.is_cpu_hotplug_disable) { int onlines_cpu_n = num_online_cpus(); if (g_next_hp_action) // turn on CPU { if (onlines_cpu_n < num_possible_cpus()) { printk("hp_work_handler: cpu_up(%d) kick off\n", onlines_cpu_n); cpu_up(onlines_cpu_n); printk("hp_work_handler: cpu_up(%d) completion\n", onlines_cpu_n); dbs_ignore = 0; // force trigger frequency scaling } } else // turn off CPU { if (onlines_cpu_n > 1) { printk("hp_work_handler: cpu_down(%d) kick off\n", (onlines_cpu_n - 1)); cpu_down((onlines_cpu_n - 1)); printk("hp_work_handler: cpu_down(%d) completion\n", (onlines_cpu_n - 1)); dbs_ignore = 0; // force trigger frequency scaling } } } mutex_unlock(&bl_onoff_mutex); } } #endif static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) { unsigned int max_load_freq; bool raise_freq = false; struct cpufreq_policy *policy; unsigned int j; this_dbs_info->freq_lo = 0; policy = this_dbs_info->cur_policy; /* * Every sampling_rate, we check, if current idle time is less * than 20% (default), then we try to increase frequency * Every sampling_rate, we look for a the lowest * frequency which can sustain the load while keeping idle time over * 30%. If such a frequency exist, we try to decrease to this frequency. * * Any frequency increase takes it to the maximum frequency. * Frequency reduction happens at minimum steps of * 5% (default) of current frequency */ /* Get Absolute Load - in terms of freq */ max_load_freq = 0; cpus_sum_load = 0; for_each_cpu(j, policy->cpus) { struct cpu_dbs_info_s *j_dbs_info; cputime64_t cur_wall_time, cur_idle_time, cur_iowait_time; unsigned int idle_time, wall_time, iowait_time; unsigned int load, load_freq; int freq_avg; j_dbs_info = &per_cpu(hp_cpu_dbs_info, j); cur_idle_time = get_cpu_idle_time(j, &cur_wall_time, dbs_tuners_ins.io_is_busy); cur_iowait_time = get_cpu_iowait_time(j, &cur_wall_time); wall_time = (unsigned int) (cur_wall_time - j_dbs_info->prev_cpu_wall); j_dbs_info->prev_cpu_wall = cur_wall_time; idle_time = (unsigned int) (cur_idle_time - j_dbs_info->prev_cpu_idle); j_dbs_info->prev_cpu_idle = cur_idle_time; iowait_time = (unsigned int) (cur_iowait_time - j_dbs_info->prev_cpu_iowait); j_dbs_info->prev_cpu_iowait = cur_iowait_time; if (dbs_tuners_ins.ignore_nice) { u64 cur_nice; unsigned long cur_nice_jiffies; cur_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE] - j_dbs_info->prev_cpu_nice; /* * Assumption: nice time between sampling periods will * be less than 2^32 jiffies for 32 bit sys */ cur_nice_jiffies = (unsigned long) cputime64_to_jiffies64(cur_nice); j_dbs_info->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE]; idle_time += jiffies_to_usecs(cur_nice_jiffies); } /* * For the purpose of hotplug, waiting for disk IO is an * indication that you're performance critical, and not that * the system is actually idle. So subtract the iowait time * from the cpu idle time. */ if (dbs_tuners_ins.io_is_busy && idle_time >= iowait_time) idle_time -= iowait_time; if (unlikely(!wall_time || wall_time < idle_time)) continue; load = 100 * (wall_time - idle_time) / wall_time; cpus_sum_load += load; freq_avg = __cpufreq_driver_getavg(policy, j); if (freq_avg <= 0) freq_avg = policy->cur; load_freq = load * freq_avg; if (load_freq > max_load_freq) max_load_freq = load_freq; #ifdef DEBUG_LOG printk("dbs_check_cpu: cpu = %d\n", j); printk("dbs_check_cpu: wall_time = %d, idle_time = %d, load = %d\n", wall_time, idle_time, load); printk("dbs_check_cpu: freq_avg = %d, max_load_freq = %d, cpus_sum_load = %d\n", freq_avg, max_load_freq, cpus_sum_load); #endif } // record loading information cpu_loading = max_load_freq / policy->cur; // dispatch power budget if(g_thermal_count >= dbs_tuners_ins.thermal_dispatch_avg_times) { g_thermal_count = 0; mt_dvfs_power_dispatch_safe(); if ((dbs_thermal_limited == 1) && (policy->cur > dbs_thermal_limited_freq)) __cpufreq_driver_target(policy, dbs_thermal_limited_freq, CPUFREQ_RELATION_L); } else g_thermal_count++; if (policy->cur >= get_normal_max_freq()){ if ((max_load_freq > dbs_tuners_ins.od_threshold * policy->cur) && (num_online_cpus() == num_possible_cpus())){ g_max_cpu_persist_count++; #ifdef DEBUG_LOG printk("dvfs_od: g_max_cpu_persist_count: %d\n", g_max_cpu_persist_count); #endif if(g_max_cpu_persist_count == DEF_CPU_PERSIST_COUNT){ //only ramp up to OD OPP here #ifdef DEBUG_LOG printk("dvfs_od: cpu loading = %d\n", max_load_freq/policy->cur); #endif if (policy->cur < policy->max) this_dbs_info->rate_mult = dbs_tuners_ins.sampling_down_factor; dbs_freq_increase(policy, policy->max); #ifdef DEBUG_LOG printk("reset g_max_cpu_persist_count, count = 10\n"); #endif g_max_cpu_persist_count = 0; goto hp_check; } } else { g_max_cpu_persist_count = 0; } } else{ if (max_load_freq > dbs_tuners_ins.up_threshold * policy->cur) { /* If switching to max speed, apply sampling_down_factor */ if (policy->cur < get_normal_max_freq()) this_dbs_info->rate_mult = dbs_tuners_ins.sampling_down_factor; dbs_freq_increase(policy, get_normal_max_freq()); if(g_max_cpu_persist_count != 0){ g_max_cpu_persist_count = 0; #ifdef DEBUG_LOG printk("reset g_max_cpu_persist_count, and fallback to normal max\n"); #endif } goto hp_check; } } /* Check for frequency decrease */ /* if we cannot reduce the frequency anymore, break out early */ if (policy->cur == policy->min) goto hp_check; /* * The optimal frequency is the frequency that is the lowest that * can support the current CPU usage without triggering the up * policy. To be safe, we focus 10 points under the threshold. */ if (max_load_freq < (dbs_tuners_ins.up_threshold - dbs_tuners_ins.down_differential) * policy->cur) { unsigned int freq_next; freq_next = max_load_freq / (dbs_tuners_ins.up_threshold - dbs_tuners_ins.down_differential); /* No longer fully busy, reset rate_mult */ this_dbs_info->rate_mult = 1; if (freq_next < policy->min) freq_next = policy->min; if(g_max_cpu_persist_count != 0){ g_max_cpu_persist_count = 0; #ifdef DEBUG_LOG printk("reset g_max_cpu_persist_count, decrease freq accrording to loading\n"); #endif } if (!dbs_tuners_ins.powersave_bias) { __cpufreq_driver_target(policy, freq_next, CPUFREQ_RELATION_L); } else { int freq = powersave_bias_target(policy, freq_next, CPUFREQ_RELATION_L); __cpufreq_driver_target(policy, freq, CPUFREQ_RELATION_L); } } hp_check: /* If Hot Plug policy disable, return directly */ if (dbs_tuners_ins.is_cpu_hotplug_disable) return; #ifdef CONFIG_SMP mutex_lock(&hp_mutex); /* Check CPU loading to power up slave CPU */ if (num_online_cpus() < dbs_tuners_ins.cpu_num_base && num_online_cpus() < dbs_tuners_ins.cpu_num_limit) { raise_freq = true; printk("dbs_check_cpu: turn on CPU by perf service\n"); g_next_hp_action = 1; schedule_delayed_work_on(0, &hp_work, 0); } else if (num_online_cpus() < num_possible_cpus() && num_online_cpus() < dbs_tuners_ins.cpu_num_limit) { g_cpu_up_count++; g_cpu_up_sum_load += cpus_sum_load; if (g_cpu_up_count == dbs_tuners_ins.cpu_up_avg_times) { g_cpu_up_sum_load /= dbs_tuners_ins.cpu_up_avg_times; if (g_cpu_up_sum_load > (dbs_tuners_ins.cpu_up_threshold * num_online_cpus())) { #ifdef DEBUG_LOG printk("dbs_check_cpu: g_cpu_up_sum_load = %d\n", g_cpu_up_sum_load); #endif raise_freq = true; printk("dbs_check_cpu: turn on CPU\n"); g_next_hp_action = 1; schedule_delayed_work_on(0, &hp_work, 0); } g_cpu_up_count = 0; g_cpu_up_sum_load = 0; } #ifdef DEBUG_LOG printk("dbs_check_cpu: g_cpu_up_count = %d, g_cpu_up_sum_load = %d\n", g_cpu_up_count, g_cpu_up_sum_load); printk("dbs_check_cpu: cpu_up_threshold = %d\n", (dbs_tuners_ins.cpu_up_threshold * num_online_cpus())); #endif } /* Check CPU loading to power down slave CPU */ if (num_online_cpus() > 1) { g_cpu_down_count++; g_cpu_down_sum_load += cpus_sum_load; if (g_cpu_down_count == dbs_tuners_ins.cpu_down_avg_times) { g_cpu_down_sum_load /= dbs_tuners_ins.cpu_down_avg_times; if (g_cpu_down_sum_load < ((dbs_tuners_ins.cpu_up_threshold - dbs_tuners_ins.cpu_down_differential) * (num_online_cpus() - 1))) { if (num_online_cpus() > dbs_tuners_ins.cpu_num_base) { #ifdef DEBUG_LOG printk("dbs_check_cpu: g_cpu_down_sum_load = %d\n", g_cpu_down_sum_load); #endif raise_freq = true; printk("dbs_check_cpu: turn off CPU\n"); g_next_hp_action = 0; schedule_delayed_work_on(0, &hp_work, 0); } } g_cpu_down_count = 0; g_cpu_down_sum_load = 0; } #ifdef DEBUG_LOG printk("dbs_check_cpu: g_cpu_down_count = %d, g_cpu_down_sum_load = %d\n", g_cpu_down_count, g_cpu_down_sum_load); printk("dbs_check_cpu: cpu_down_threshold = %d\n", ((dbs_tuners_ins.cpu_up_threshold - dbs_tuners_ins.cpu_down_differential) * (num_online_cpus() - 1))); #endif } mutex_unlock(&hp_mutex); #endif // need to retrieve dbs_freq_increase out of hp_mutex // in case of self-deadlock if(raise_freq == true) dbs_freq_increase(policy, policy->max); return; } static void do_dbs_timer(struct work_struct *work) { struct cpu_dbs_info_s *dbs_info = container_of(work, struct cpu_dbs_info_s, work.work); unsigned int cpu = dbs_info->cpu; int sample_type = dbs_info->sample_type; int delay; mutex_lock(&dbs_info->timer_mutex); /* Common NORMAL_SAMPLE setup */ dbs_info->sample_type = DBS_NORMAL_SAMPLE; if (!dbs_tuners_ins.powersave_bias || sample_type == DBS_NORMAL_SAMPLE) { dbs_check_cpu(dbs_info); if (dbs_info->freq_lo) { /* Setup timer for SUB_SAMPLE */ dbs_info->sample_type = DBS_SUB_SAMPLE; delay = dbs_info->freq_hi_jiffies; } else { /* We want all CPUs to do sampling nearly on * same jiffy */ delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate * dbs_info->rate_mult); if (num_online_cpus() > 1) delay -= jiffies % delay; } } else { __cpufreq_driver_target(dbs_info->cur_policy, dbs_info->freq_lo, CPUFREQ_RELATION_H); delay = dbs_info->freq_lo_jiffies; } schedule_delayed_work_on(cpu, &dbs_info->work, delay); mutex_unlock(&dbs_info->timer_mutex); } static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info) { /* We want all CPUs to do sampling nearly on same jiffy */ int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate); if (num_online_cpus() > 1) delay -= jiffies % delay; dbs_info->sample_type = DBS_NORMAL_SAMPLE; INIT_DELAYED_WORK(&dbs_info->work, do_dbs_timer); schedule_delayed_work_on(dbs_info->cpu, &dbs_info->work, delay); } static inline void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info) { cancel_delayed_work_sync(&dbs_info->work); } /* * Not all CPUs want IO time to be accounted as busy; this dependson how * efficient idling at a higher frequency/voltage is. * Pavel Machek says this is not so for various generations of AMD and old * Intel systems. * Mike Chan (androidlcom) calis this is also not true for ARM. * Because of this, whitelist specific known (series) of CPUs by default, and * leave all others up to the user. */ static int should_io_be_busy(void) { #if defined(CONFIG_X86) /* * For Intel, Core 2 (model 15) andl later have an efficient idle. */ if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model >= 15) return 1; #endif return 1; // io wait time should be subtracted from idle time } #if INPUT_BOOST static void dbs_input_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) { if ((type == EV_KEY) && (code == BTN_TOUCH) && (value == 1) && (dbs_tuners_ins.cpu_input_boost_enable)) { force_two_core(); } } static int dbs_input_connect(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id) { struct input_handle *handle; int error; handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); if (!handle) return -ENOMEM; handle->dev = dev; handle->handler = handler; handle->name = "cpufreq_balance"; error = input_register_handle(handle); if (error) goto err2; error = input_open_device(handle); if (error) goto err1; return 0; err1: input_unregister_handle(handle); err2: kfree(handle); return error; } static void dbs_input_disconnect(struct input_handle *handle) { input_close_device(handle); input_unregister_handle(handle); kfree(handle); } static const struct input_device_id dbs_ids[] = { { .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, .evbit = { BIT_MASK(EV_ABS) }, .absbit = { [BIT_WORD(ABS_MT_POSITION_X)] = BIT_MASK(ABS_MT_POSITION_X) | BIT_MASK(ABS_MT_POSITION_Y) }, }, /* multi-touch touchscreen */ { .flags = INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, .absbit = { [BIT_WORD(ABS_X)] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, }, /* touchpad */ { }, }; static struct input_handler dbs_input_handler = { .event = dbs_input_event, .connect = dbs_input_connect, .disconnect = dbs_input_disconnect, .name = "cpufreq_balance", .id_table = dbs_ids, }; #endif //#ifdef CONFIG_HOTPLUG_CPU static int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event) { unsigned int cpu = policy->cpu; struct cpu_dbs_info_s *this_dbs_info; unsigned int j; int rc; this_dbs_info = &per_cpu(hp_cpu_dbs_info, cpu); switch (event) { case CPUFREQ_GOV_START: if ((!cpu_online(cpu)) || (!policy->cur)) return -EINVAL; mutex_lock(&dbs_mutex); dbs_enable++; for_each_cpu(j, policy->cpus) { struct cpu_dbs_info_s *j_dbs_info; j_dbs_info = &per_cpu(hp_cpu_dbs_info, j); j_dbs_info->cur_policy = policy; j_dbs_info->prev_cpu_idle = get_cpu_idle_time(j, &j_dbs_info->prev_cpu_wall, dbs_tuners_ins.io_is_busy); if (dbs_tuners_ins.ignore_nice) j_dbs_info->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE]; } this_dbs_info->cpu = cpu; this_dbs_info->rate_mult = 1; hotplug_powersave_bias_init_cpu(cpu); /* * Start the timerschedule work, when this governor * is used for first time */ if (dbs_enable == 1) { unsigned int latency; rc = sysfs_create_group(cpufreq_global_kobject, &dbs_attr_group); if (rc) { mutex_unlock(&dbs_mutex); return rc; } /* policy latency is in nS. Convert it to uS first */ latency = policy->cpuinfo.transition_latency / 1000; if (latency == 0) latency = 1; /* Bring kernel and HW constraints together */ min_sampling_rate = max(min_sampling_rate, MIN_LATENCY_MULTIPLIER * latency); dbs_tuners_ins.sampling_rate = max(min_sampling_rate, latency * LATENCY_MULTIPLIER); dbs_tuners_ins.io_is_busy = should_io_be_busy(); #ifdef DEBUG_LOG printk("cpufreq_governor_dbs: min_sampling_rate = %d\n", min_sampling_rate); printk("cpufreq_governor_dbs: dbs_tuners_ins.sampling_rate = %d\n", dbs_tuners_ins.sampling_rate); printk("cpufreq_governor_dbs: dbs_tuners_ins.io_is_busy = %d\n", dbs_tuners_ins.io_is_busy); #endif } #if INPUT_BOOST if (!cpu) rc = input_register_handler(&dbs_input_handler); #endif mutex_unlock(&dbs_mutex); mutex_init(&this_dbs_info->timer_mutex); dbs_timer_init(this_dbs_info); break; case CPUFREQ_GOV_STOP: dbs_timer_exit(this_dbs_info); mutex_lock(&dbs_mutex); mutex_destroy(&this_dbs_info->timer_mutex); dbs_enable--; #if INPUT_BOOST if (!cpu) input_unregister_handler(&dbs_input_handler); #endif mutex_unlock(&dbs_mutex); if (!dbs_enable) sysfs_remove_group(cpufreq_global_kobject, &dbs_attr_group); break; case CPUFREQ_GOV_LIMITS: mutex_lock(&this_dbs_info->timer_mutex); if (get_normal_max_freq() < this_dbs_info->cur_policy->cur) __cpufreq_driver_target(this_dbs_info->cur_policy, get_normal_max_freq(), CPUFREQ_RELATION_H); else if (policy->min > this_dbs_info->cur_policy->cur) __cpufreq_driver_target(this_dbs_info->cur_policy, policy->min, CPUFREQ_RELATION_L); mutex_unlock(&this_dbs_info->timer_mutex); break; } return 0; } /*int cpufreq_gov_dbs_get_sum_load(void) { return cpus_sum_load; }*/ #if INPUT_BOOST static int touch_freq_up_task(void *data) { struct cpufreq_policy *policy; while (1) { policy = cpufreq_cpu_get(0); if(policy != NULL) { dbs_freq_increase(policy, policy->max); cpufreq_cpu_put(policy); } set_current_state(TASK_INTERRUPTIBLE); schedule(); if (kthread_should_stop()) break; } return 0; } #endif static int __init cpufreq_gov_dbs_init(void) { u64 idle_time; int cpu = get_cpu(); #if INPUT_BOOST struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; #endif idle_time = get_cpu_idle_time_us(cpu, NULL); put_cpu(); if (idle_time != -1ULL) { /* Idle micro accounting is supported. Use finer thresholds */ dbs_tuners_ins.up_threshold = MICRO_FREQUENCY_UP_THRESHOLD; dbs_tuners_ins.down_differential = MICRO_FREQUENCY_DOWN_DIFFERENTIAL; dbs_tuners_ins.cpu_up_threshold = MICRO_CPU_UP_THRESHOLD; dbs_tuners_ins.cpu_down_differential = MICRO_CPU_DOWN_DIFFERENTIAL; /* * In nohz/micro accounting case we set the minimum frequency * not depending on HZ, but fixed (very low). The deferred * timer might skip some samples if idle/sleeping as needed. */ min_sampling_rate = MICRO_FREQUENCY_MIN_SAMPLE_RATE; } else { /* For correct statistics, we need 10 ticks for each measure */ min_sampling_rate = MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(10); } dbs_tuners_ins.cpu_num_limit = num_possible_cpus(); dbs_tuners_ins.cpu_num_base = 1; if (dbs_tuners_ins.cpu_num_limit > 1) dbs_tuners_ins.is_cpu_hotplug_disable = 0; #ifdef CONFIG_SMP INIT_DELAYED_WORK(&hp_work, hp_work_handler); #endif #if INPUT_BOOST freq_up_task = kthread_create(touch_freq_up_task, NULL, "touch_freq_up_task"); if (IS_ERR(freq_up_task)) return PTR_ERR(freq_up_task); sched_setscheduler_nocheck(freq_up_task, SCHED_FIFO, ¶m); get_task_struct(freq_up_task); #endif #ifdef DEBUG_LOG printk("cpufreq_gov_dbs_init: min_sampling_rate = %d\n", min_sampling_rate); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.up_threshold = %d\n", dbs_tuners_ins.up_threshold); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.od_threshold = %d\n", dbs_tuners_ins.od_threshold); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.down_differential = %d\n", dbs_tuners_ins.down_differential); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_up_threshold = %d\n", dbs_tuners_ins.cpu_up_threshold); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_down_differential = %d\n", dbs_tuners_ins.cpu_down_differential); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_up_avg_times = %d\n", dbs_tuners_ins.cpu_up_avg_times); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_down_avg_times = %d\n", dbs_tuners_ins.cpu_down_avg_times); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.thermal_di_avg_times = %d\n", dbs_tuners_ins.thermal_dispatch_avg_times); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_num_limit = %d\n", dbs_tuners_ins.cpu_num_limit); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_num_base = %d\n", dbs_tuners_ins.cpu_num_base); printk("cpufreq_gov_dbs_init: dbs_tuners_ins.is_cpu_hotplug_disable = %d\n", dbs_tuners_ins.is_cpu_hotplug_disable); #if INPUT_BOOST printk("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_input_boost_enable = %d\n", dbs_tuners_ins.cpu_input_boost_enable); #endif /* INPUT_BOOST */ #endif /* DEBUG_LOG */ return cpufreq_register_governor(&cpufreq_gov_balance); } static void __exit cpufreq_gov_dbs_exit(void) { #ifdef CONFIG_SMP cancel_delayed_work_sync(&hp_work); #endif cpufreq_unregister_governor(&cpufreq_gov_balance); #if INPUT_BOOST kthread_stop(freq_up_task); put_task_struct(freq_up_task); #endif } MODULE_AUTHOR("Venkatesh Pallipadi "); MODULE_AUTHOR("Alexey Starikovskiy "); MODULE_DESCRIPTION("'cpufreq_balance' - A dynamic cpufreq governor for " "Low Latency Frequency Transition capable processors"); MODULE_LICENSE("GPL"); #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_BALANCE fs_initcall(cpufreq_gov_dbs_init); #else module_init(cpufreq_gov_dbs_init); #endif module_exit(cpufreq_gov_dbs_exit);