int single_freq_init (actuator_t *act)
{
int err;
struct cpufreq_policy *policy;
struct cpufreq_available_frequencies *freq_list;
freq_scaler_data_t *data;
unsigned long freq_min, freq_max;
act->data = data = malloc(sizeof(freq_scaler_data_t));
fail_if(!data, "cannot allocate freq data block");
err = cpufreq_get_hardware_limits(act->core, &freq_min, &freq_max);
fail_if(err, "cannot get cpufreq hardware limits");
act->min = freq_min;
act->max = freq_max;
policy = cpufreq_get_policy(act->core);
fail_if(!policy, "cannot get cpufreq policy");
if (strcmp(policy->governor, "userspace") != 0) {
err = cpufreq_modify_policy_governor(act->core, "userspace");
policy = cpufreq_get_policy(act->core);
fail_if (strcmp(policy->governor, "userspace") != 0, "cannot set cpufreq policy to userspace");
}
freq_list = cpufreq_get_available_frequencies(act->core);
data->freq_count = create_freq_array(freq_list, &data->freq_array);
fail_if(data->freq_count < 1, "cannot get frequency list");
act->value = act->set_value = cpufreq_get_freq_kernel(act->core);
data->cur_index = get_freq_index(data, act->value);
return 0;
fail:
return -1;
}
static int boost_mig_sync_thread(void *data)
{
int dest_cpu = (int) data;
int src_cpu, ret;
struct cpu_sync *s = &per_cpu(sync_info, dest_cpu);
struct cpufreq_policy dest_policy;
struct cpufreq_policy src_policy;
unsigned long flags;
while (1) {
wait_event(s->sync_wq, s->pending || kthread_should_stop());
if (kthread_should_stop())
break;
spin_lock_irqsave(&s->lock, flags);
s->pending = false;
src_cpu = s->src_cpu;
spin_unlock_irqrestore(&s->lock, flags);
ret = cpufreq_get_policy(&src_policy, src_cpu);
if (ret)
continue;
ret = cpufreq_get_policy(&dest_policy, dest_cpu);
if (ret)
continue;
if (dest_policy.cur >= src_policy.cur) {
pr_debug("No sync. CPU%d@%dKHz >= CPU%d@%dKHz\n",
dest_cpu, dest_policy.cur,
src_cpu, src_policy.cur);
continue;
}
if (sync_threshold && (dest_policy.cur >= sync_threshold))
continue;
cancel_delayed_work_sync(&s->boost_rem);
if (sync_threshold)
s->boost_min = min(sync_threshold, src_policy.cur);
else
s->boost_min = src_policy.cur;
/* Force policy re-evaluation to trigger adjust notifier. */
get_online_cpus();
if (cpu_online(dest_cpu)) {
cpufreq_update_policy(dest_cpu);
queue_delayed_work_on(dest_cpu, cpu_boost_wq,
&s->boost_rem, msecs_to_jiffies(boost_ms));
} else {
s->boost_min = 0;
}
put_online_cpus();
}
return 0;
}
static void run_boost_migration(unsigned int cpu)
{
int dest_cpu = cpu;
int src_cpu, ret;
struct cpu_sync *s = &per_cpu(sync_info, dest_cpu);
struct cpufreq_policy dest_policy;
struct cpufreq_policy src_policy;
unsigned long flags;
spin_lock_irqsave(&s->lock, flags);
s->pending = false;
src_cpu = s->src_cpu;
spin_unlock_irqrestore(&s->lock, flags);
ret = cpufreq_get_policy(&src_policy, src_cpu);
if (ret)
return;
ret = cpufreq_get_policy(&dest_policy, dest_cpu);
if (ret)
return;
if (src_policy.min == src_policy.cpuinfo.min_freq) {
pr_debug("No sync. Source CPU%d@%dKHz at min freq\n",
src_cpu, src_policy.cur);
return;
}
cancel_delayed_work_sync(&s->boost_rem);
if (sync_threshold)
s->boost_min = min(sync_threshold, src_policy.cur);
else
s->boost_min = src_policy.cur;
/* Force policy re-evaluation to trigger adjust notifier. */
get_online_cpus();
if (cpu_online(src_cpu))
/*
* Send an unchanged policy update to the source
* CPU. Even though the policy isn't changed from
* its existing boosted or non-boosted state
* notifying the source CPU will let the governor
* know a boost happened on another CPU and that it
* should re-evaluate the frequency at the next timer
* event without interference from a min sample time.
*/
cpufreq_update_policy(src_cpu);
if (cpu_online(dest_cpu)) {
cpufreq_update_policy(dest_cpu);
queue_delayed_work_on(dest_cpu, cpu_boost_wq,
&s->boost_rem, msecs_to_jiffies(boost_ms));
} else {
s->boost_min = 0;
}
put_online_cpus();
}
static void run_boost_migration(unsigned int cpu)
{
int dest_cpu = cpu;
int src_cpu, ret;
struct cpu_sync *s = &per_cpu(sync_info, dest_cpu);
struct cpufreq_policy dest_policy;
struct cpufreq_policy src_policy;
unsigned long flags;
spin_lock_irqsave(&s->lock, flags);
s->pending = false;
src_cpu = s->src_cpu;
spin_unlock_irqrestore(&s->lock, flags);
ret = cpufreq_get_policy(&src_policy, src_cpu);
if (ret)
return;
ret = cpufreq_get_policy(&dest_policy, dest_cpu);
if (ret)
return;
if (src_policy.min == src_policy.cur &&
src_policy.min <= dest_policy.min) {
pr_debug("No sync. CPU%d@%dKHz == min freq@%dKHz\n",
src_cpu, src_policy.cur,
src_policy.min);
return;
}
cancel_delayed_work_sync(&s->boost_rem);
if (sync_threshold) {
if (src_policy.cur >= sync_threshold)
s->boost_min = sync_threshold;
else
s->boost_min = src_policy.cur;
} else {
s->boost_min = src_policy.cur;
}
/* Force policy re-evaluation to trigger adjust notifier. */
get_online_cpus();
if (cpu_online(dest_cpu)) {
cpufreq_update_policy(dest_cpu);
queue_delayed_work_on(dest_cpu, cpu_boost_wq,
&s->boost_rem, msecs_to_jiffies(boost_ms));
} else {
s->boost_min = 0;
}
put_online_cpus();
}
static void run_boost_migration(unsigned int cpu)
{
int dest_cpu = cpu;
int src_cpu, ret;
struct cpu_sync *s = &per_cpu(sync_info, dest_cpu);
struct cpufreq_policy dest_policy;
struct cpufreq_policy src_policy;
unsigned long flags;
unsigned int req_freq;
spin_lock_irqsave(&s->lock, flags);
s->pending = false;
src_cpu = s->src_cpu;
spin_unlock_irqrestore(&s->lock, flags);
ret = cpufreq_get_policy(&src_policy, src_cpu);
if (ret)
return;
ret = cpufreq_get_policy(&dest_policy, dest_cpu);
if (ret)
return;
req_freq = max((dest_policy.max * s->task_load) / 100,
src_policy.cur);
if (req_freq <= dest_policy.cpuinfo.min_freq) {
pr_debug("No sync. Sync Freq:%u\n", req_freq);
return;
}
if (sync_threshold)
req_freq = min(sync_threshold, req_freq);
cancel_delayed_work_sync(&s->boost_rem);
s->boost_min = req_freq;
/* Force policy re-evaluation to trigger adjust notifier. */
get_online_cpus();
if (cpu_online(dest_cpu)) {
cpufreq_update_policy(dest_cpu);
queue_delayed_work_on(dest_cpu, cpu_boost_wq,
&s->boost_rem, msecs_to_jiffies(boost_ms));
} else {
s->boost_min = 0;
}
put_online_cpus();
}
static int
syf_pwm_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, void *arg)
{
int i;
unsigned int freq;
cpu_ctrl_t *cc = (cpu_ctrl_t *) arg;
pmu_results_t *r = &(cc->pmu);
unsigned int amt_cpu = cc->amt_cpu;
unsigned int amt_counter = cc->amt_counter;
for (i = 0; i < amt_cpu; ++i) {
struct syf_info_t *_sinfo = &per_cpu(_syf_info, i);
switch (cmd) {
case SYFPWM_TESTING:
printk("TESTING.\n");
break;
case SYFPWM_PMU_START:
pmu_start(amt_counter, cc->evt_t);
break;
case SYFPWM_PMU_STOP:
pmu_stop(amt_counter);
memcpy(r, &pmu, sizeof(pmu_results_t));
break;
case SYFPWM_GET_FEQU:
mutex_lock(&_syf_mutex);
cpufreq_get_policy(&_sinfo->cur_policy, i);
freq = cpufreq_get(_sinfo->cur_policy.cpu);
mutex_unlock(&_syf_mutex);
break;
case SYFPWM_SET_FEQU:
mutex_lock(&_syf_mutex);
cpufreq_get_policy(&_sinfo->cur_policy, i);
freq = __cpufreq_driver_target(&_sinfo->cur_policy,
(unsigned int) cc->cpu_freq,
CPUFREQ_RELATION_H);
mutex_unlock(&_syf_mutex);
break;
}
}
return 0;
}
static void do_input_boost(struct work_struct *work)
{
unsigned int i, ret, freq;
struct cpu_sync *i_sync_info;
struct cpufreq_policy policy;
for_each_online_cpu(i) {
i_sync_info = &per_cpu(sync_info, i);
ret = cpufreq_get_policy(&policy, i);
if (ret)
continue;
// ensure, touch boost freq does never exceed max scaling freq
if (input_boost_freq > policy.max)
freq = policy.max;
else
freq = input_boost_freq;
if (policy.cur >= freq)
continue;
cancel_delayed_work_sync(&i_sync_info->input_boost_rem);
i_sync_info->input_boost_min = freq;
cpufreq_update_policy(i);
queue_delayed_work_on(i_sync_info->cpu, cpu_boost_wq,
&i_sync_info->input_boost_rem,
msecs_to_jiffies(input_boost_ms));
}
}
static void screen_off_limit(bool on)
{
unsigned int i, ret;
struct cpufreq_policy policy;
struct ip_cpu_info *l_ip_info;
/* not active, so exit */
if (screen_off_max == UINT_MAX)
return;
for_each_online_cpu(i) {
l_ip_info = &per_cpu(ip_info, i);
ret = cpufreq_get_policy(&policy, i);
if (ret)
continue;
if (on) {
/* save current instance */
l_ip_info->curr_max = policy.max;
policy.max = screen_off_max;
} else {
/* restore */
policy.max = l_ip_info->curr_max;
}
cpufreq_update_policy(i);
}
}
static void do_input_boost(struct work_struct *work)
{
unsigned int i, ret;
struct cpufreq_policy policy;
/*
* to avoid concurrency issues we cancel rem_input_boost
* and wait for it to finish the work
*/
cancel_delayed_work_sync(&rem_input_boost);
for_each_online_cpu(i)
{
ret = cpufreq_get_policy(&policy, i);
if (ret)
continue;
if (policy.cur < input_boost_freq)
{
boost_freq_buf = input_boost_freq;
cpufreq_update_policy(i);
}
}
queue_delayed_work_on(0, input_boost_wq,
&rem_input_boost, msecs_to_jiffies(30));
}
static void do_input_boost(struct work_struct *work)
{
unsigned int i, ret;
struct cpu_sync *i_sync_info;
struct cpufreq_policy policy;
get_online_cpus();
for_each_online_cpu(i) {
i_sync_info = &per_cpu(sync_info, i);
ret = cpufreq_get_policy(&policy, i);
if (ret)
continue;
if (policy.cur >= input_boost_freq)
continue;
cancel_delayed_work_sync(&i_sync_info->input_boost_rem);
i_sync_info->input_boost_min = input_boost_freq;
cpufreq_update_policy(i);
queue_delayed_work_on(i_sync_info->cpu, cpu_boost_wq,
&i_sync_info->input_boost_rem,
msecs_to_jiffies(input_boost_ms));
}
put_online_cpus();
}
static unsigned int get_curr_load(unsigned int cpu)
{
int ret;
unsigned int idle_time, wall_time;
unsigned int cur_load;
u64 cur_wall_time, cur_idle_time;
struct cpu_load_data *pcpu = &per_cpu(cpuload, cpu);
struct cpufreq_policy policy;
ret = cpufreq_get_policy(&policy, cpu);
if (ret)
return -EINVAL;
cur_idle_time = get_cpu_idle_time(cpu, &cur_wall_time, 0);
wall_time = (unsigned int) (cur_wall_time - pcpu->prev_cpu_wall);
pcpu->prev_cpu_wall = cur_wall_time;
idle_time = (unsigned int) (cur_idle_time - pcpu->prev_cpu_idle);
pcpu->prev_cpu_idle = cur_idle_time;
if (unlikely(!wall_time || wall_time < idle_time))
return 0;
cur_load = 100 * (wall_time - idle_time) / wall_time;
return cur_load;
}
static int do_new_policy(unsigned int cpu, struct cpufreq_policy *new_pol)
{
struct cpufreq_policy *cur_pol = cpufreq_get_policy(cpu);
int ret;
if (!cur_pol) {
printf(_("wrong, unknown or unhandled CPU?\n"));
return -EINVAL;
}
if (!new_pol->min)
new_pol->min = cur_pol->min;
if (!new_pol->max)
new_pol->max = cur_pol->max;
if (!new_pol->governor)
new_pol->governor = cur_pol->governor;
ret = cpufreq_set_policy(cpu, new_pol);
cpufreq_put_policy(cur_pol);
return ret;
}
static int cpu_has_cpufreq(unsigned int cpu)
{
struct cpufreq_policy policy;
if (!acpi_thermal_cpufreq_is_init || cpufreq_get_policy(&policy, cpu))
return 0;
return 1;
}
static int set_cpufreq(int cpu, int min_freq, int max_freq)
{
int ret;
struct cpufreq_policy policy;
pr_debug("set cpu freq: min %d, max %d\n", min_freq, max_freq);
ret = cpufreq_get_policy(&policy, cpu);
if (ret < 0) {
pr_err("usecase-gov: failed to read policy\n");
return ret;
}
if (policy.min > max_freq) {
ret = cpufreq_update_freq(cpu, min_freq, policy.max);
if (ret)
pr_err("usecase-gov: update min cpufreq failed (1)\n");
}
if (policy.max < min_freq) {
ret = cpufreq_update_freq(cpu, policy.min, max_freq);
if (ret)
pr_err("usecase-gov: update max cpufreq failed (2)\n");
}
ret = cpufreq_update_freq(cpu, min_freq, max_freq);
if (ret)
pr_err("usecase-gov: update min-max cpufreq failed\n");
return ret;
}
static int update_cpu_max_freq(int cpu, int throttled_bin, unsigned temp)
{
int ret;
int max_frequency = max_freq(throttled_bin);
ret = msm_cpufreq_set_freq_limits(cpu, MSM_CPUFREQ_NO_LIMIT, max_frequency);
if (ret)
return ret;
ret = cpufreq_update_policy(cpu);
if (ret)
return ret;
if (max_frequency != MSM_CPUFREQ_NO_LIMIT) {
struct cpufreq_policy policy;
if ((ret = cpufreq_get_policy(&policy, cpu)) == 0)
ret = cpufreq_driver_target(&policy, max_frequency, CPUFREQ_RELATION_L);
}
if (max_frequency != MSM_CPUFREQ_NO_LIMIT)
pr_info("msm_thermal: limiting cpu%d max frequency to %d at %u degC\n",
cpu, max_frequency, temp);
else
pr_info("msm_thermal: Max frequency reset for cpu%d at %u degC\n", cpu, temp);
return ret;
}
static int cd_set_cur_state(struct thermal_cooling_device *cdev,
unsigned long state)
{
struct thermal_freq *therm = cdev->devdata;
struct cpufreq_policy policy;
int trip, i;
if (!state && therm->state) {
if (cpufreq_get_policy(&policy, 0))
return -EINVAL;
maximum_freq = policy.cpuinfo.max_freq;
therm->current_trip = -1;
therm->state = 0;
therm->tdev->polling_delay = therm->idle_polling_delay;
cpufreq_update_policy(0);
return 0;
}
trip = -1;
therm->state = state;
for (i = 0; i < therm->trip_count; i++) {
if (therm->current_temp < therm->trip_table[i].temp)
break;
trip = i;
}
if (i == therm->current_trip)
return 0;
if (cpufreq_get_policy(&policy, 0))
return -EINVAL;
if (i < 0) {
therm->tdev->polling_delay = therm->idle_polling_delay;
maximum_freq = policy.cpuinfo.max_freq;
} else {
therm->tdev->polling_delay =
therm->trip_table[i].polling_interval;
maximum_freq = therm->trip_table[i].freq;
}
cpufreq_update_policy(0);
therm->current_trip = i;
return 0;
}
void cpufreq_save_default_governor(void)
{
int ret;
struct cpufreq_policy current_policy;
ret = cpufreq_get_policy(¤t_policy, 0);
if (ret < 0)
pr_err("%s: cpufreq_get_policy got error", __func__);
memcpy(cpufreq_gov_default, current_policy.governor->name, 32);
}
/*
* Userspace sends cpu#:min_freq_value to vote for min_freq_value as the new
* scaling_min. To withdraw its vote it needs to enter cpu#:0
*/
static int set_cpu_min_freq(const char *buf, const struct kernel_param *kp)
{
int i, j, ntokens = 0;
unsigned int val, cpu;
const char *cp = buf;
struct cpu_status *i_cpu_stats;
struct cpufreq_policy policy;
cpumask_var_t limit_mask;
int ret;
while ((cp = strpbrk(cp + 1, " :")))
ntokens++;
/* CPU:value pair */
if (!(ntokens % 2))
return -EINVAL;
cp = buf;
cpumask_clear(limit_mask);
for (i = 0; i < ntokens; i += 2) {
if (sscanf(cp, "%u:%u", &cpu, &val) != 2)
return -EINVAL;
if (cpu > (num_present_cpus() - 1))
return -EINVAL;
i_cpu_stats = &per_cpu(cpu_stats, cpu);
i_cpu_stats->min = val;
cpumask_set_cpu(cpu, limit_mask);
cp = strchr(cp, ' ');
cp++;
}
/*
* Since on synchronous systems policy is shared amongst multiple
* CPUs only one CPU needs to be updated for the limit to be
* reflected for the entire cluster. We can avoid updating the policy
* of other CPUs in the cluster once it is done for at least one CPU
* in the cluster
*/
get_online_cpus();
for_each_cpu(i, limit_mask) {
i_cpu_stats = &per_cpu(cpu_stats, i);
if (cpufreq_get_policy(&policy, i))
continue;
if (cpu_online(i) && (policy.min != i_cpu_stats->min)) {
ret = cpufreq_update_policy(i);
if (ret)
continue;
}
for_each_cpu(j, policy.related_cpus)
cpumask_clear_cpu(j, limit_mask);
}
static void read_governors() {
unsigned int cpu;
for ( cpu=0; cpu<ncpu; ++cpu ) {
struct cpufreq_policy* policy = cpufreq_get_policy(cpu);
if (policy) {
strcpy(governor[cpu], policy->governor);
cpufreq_put_policy(policy);
} else {
strcpy(governor[cpu], empty);
}
}
}
static gboolean
cpufreq_monitor_libcpufreq_run (CPUFreqMonitor *monitor)
{
guint cpu;
CPUFreqPolicy *policy;
g_object_get (G_OBJECT (monitor), "cpu", &cpu, NULL);
policy = cpufreq_get_policy (cpu);
if (!policy) {
/* Check whether it failed because
* cpu is not online.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
if (!cpufreq_cpu_exists (cpu)) {
#else
if (cpupower_is_cpu_online (cpu)) {
#endif
g_object_set (G_OBJECT (monitor), "online", FALSE, NULL);
return TRUE;
}
return FALSE;
}
g_object_set (G_OBJECT (monitor),
"online", TRUE,
"governor", policy->governor,
"frequency", cpufreq_get_freq_kernel (cpu),
NULL);
cpufreq_put_policy (policy);
return TRUE;
}
static gint
compare (gconstpointer a, gconstpointer b)
{
gint aa, bb;
aa = atoi ((gchar *) a);
bb = atoi ((gchar *) b);
if (aa == bb)
return 0;
else if (aa > bb)
return -1;
else
return 1;
}
static void wakeup_boost(void)
{
unsigned int cpu, ret;
struct cpufreq_policy policy;
for_each_online_cpu(cpu) {
ret = cpufreq_get_policy(&policy, cpu);
if (ret)
continue;
policy.cur = policy.max;
cpufreq_update_policy(cpu);
}
}
static int set_cpu_min_freq(const char *buf, const struct kernel_param *kp)
{
int i, j, ntokens = 0;
unsigned int val, cpu;
const char *cp = buf;
struct cpu_status *i_cpu_stats;
struct cpufreq_policy policy;
cpumask_var_t limit_mask;
int ret;
while ((cp = strpbrk(cp + 1, " :")))
ntokens++;
if (!(ntokens % 2))
return -EINVAL;
cp = buf;
cpumask_clear(limit_mask);
for (i = 0; i < ntokens; i += 2) {
if (sscanf(cp, "%u:%u", &cpu, &val) != 2)
return -EINVAL;
if (cpu > (num_present_cpus() - 1))
return -EINVAL;
i_cpu_stats = &per_cpu(cpu_stats, cpu);
i_cpu_stats->min = val;
cpumask_set_cpu(cpu, limit_mask);
cp = strchr(cp, ' ');
cp++;
}
get_online_cpus();
for_each_cpu(i, limit_mask) {
i_cpu_stats = &per_cpu(cpu_stats, i);
if (cpufreq_get_policy(&policy, i))
continue;
if (cpu_online(i) && (policy.min != i_cpu_stats->min)) {
ret = cpufreq_update_policy(i);
if (ret)
continue;
}
for_each_cpu(j, policy.related_cpus)
cpumask_clear_cpu(j, limit_mask);
}
static int __init msm_rq_stats_init(void)
{
int cpu = 0;
struct cpufreq_policy cpu_policy;
struct cpu_load_data *pcpu = &per_cpu(cpuload, cpu);
cpufreq_get_policy(&cpu_policy, cpu);
pcpu->policy_max = cpu_policy.max;
pcpu->cur_freq = acpuclk_get_rate(cpu);
cpumask_copy(pcpu->related_cpus, cpu_policy.cpus);
return 0;
}
JNIEXPORT jstring JNICALL Java_platforms_x86_X86_1DVFS_getGovernor
(JNIEnv *env, jobject obj, jint cpu)
{
struct cpufreq_policy *policy;
jstring governorName;
policy = cpufreq_get_policy((unsigned long)cpu);
if (policy) {
governorName = (*env)->NewStringUTF(env, policy->governor);
//(*env)->DeleteLocalRef(env, governorName);
}
//cpufreq_put_policy(policy);
return governorName;
}
static int save_before_settings(void) {
unsigned int i;
assert(saved_policies == NULL);
saved_policies = calloc(num_cpus, sizeof(*saved_policies));
if (saved_policies == NULL)
return ENOMEM;
for (i = 0; i < num_cpus; i++) {
saved_policies[i] = cpufreq_get_policy(i);
if (saved_policies[i] == NULL)
{
free(saved_policies);
saved_policies=NULL;
return EACCES;
}
}
return 0;
}
static int update_average_load(unsigned int freq, unsigned int cpu)
{
struct cpufreq_policy cpu_policy;
struct cpu_load_data *pcpu = &per_cpu(cpuload, cpu);
cputime64_t cur_wall_time, cur_idle_time, cur_iowait_time;
unsigned int idle_time, wall_time, iowait_time;
unsigned int cur_load, load_at_max_freq;
cpufreq_get_policy(&cpu_policy, cpu);
/* if max freq is changed by the user this load calculator
needs to adjust itself otherwise its going to be all wrong */
if (unlikely(pcpu->policy_max != cpu_policy.max))
pcpu->policy_max = cpu_policy.max;
cur_idle_time = get_cpu_idle_time(cpu, &cur_wall_time);
cur_iowait_time = get_cpu_iowait_time(cpu, &cur_wall_time);
wall_time = (unsigned int) (cur_wall_time - pcpu->prev_cpu_wall);
pcpu->prev_cpu_wall = cur_wall_time;
idle_time = (unsigned int) (cur_idle_time - pcpu->prev_cpu_idle);
pcpu->prev_cpu_idle = cur_idle_time;
iowait_time = (unsigned int) (cur_iowait_time - pcpu->prev_cpu_iowait);
pcpu->prev_cpu_iowait = cur_iowait_time;
if (idle_time >= iowait_time)
idle_time -= iowait_time;
if (unlikely(!wall_time || wall_time < idle_time))
return 0;
cur_load = 100 * (wall_time - idle_time) / wall_time;
/* Calculate the scaled load across CPU */
load_at_max_freq = (cur_load * freq) / pcpu->policy_max;
/* This is the first sample in this window*/
pcpu->avg_load_maxfreq = pcpu->prev_avg_load_maxfreq + load_at_max_freq;
pcpu->avg_load_maxfreq /= 2;
pcpu->window_size = wall_time;
return 0;
}
static int set_policy(int ncpus) {
int cpu;
for (cpu=0; cpu < ncpus; cpu++) {
struct cpufreq_policy *policy = cpufreq_get_policy(cpu);
if (!policy)
return -EINVAL;
//printf("%lu %lu %s\n", policy->min, policy->max, policy->governor);
if (policy->governor != "userspace"){
cpufreq_modify_policy_governor(cpu, "userspace");
printf("%lu %lu %s\n", policy->min, policy->max, policy->governor);
}
}
/* cpufreq_put_policy(policy);*/
return 0;
}
static ssize_t
acpi_processor_write_performance(struct file *file,
const char __user * buffer,
size_t count, loff_t * data)
{
int result = 0;
struct seq_file *m = (struct seq_file *)file->private_data;
struct acpi_processor *pr = (struct acpi_processor *)m->private;
struct acpi_processor_performance *perf;
char state_string[12] = { '\0' };
unsigned int new_state = 0;
struct cpufreq_policy policy;
ACPI_FUNCTION_TRACE("acpi_processor_write_performance");
if (!pr || (count > sizeof(state_string) - 1))
return_VALUE(-EINVAL);
perf = pr->performance;
if (!perf)
return_VALUE(-EINVAL);
if (copy_from_user(state_string, buffer, count))
return_VALUE(-EFAULT);
state_string[count] = '\0';
new_state = simple_strtoul(state_string, NULL, 0);
if (new_state >= perf->state_count)
return_VALUE(-EINVAL);
cpufreq_get_policy(&policy, pr->id);
policy.cpu = pr->id;
policy.min = perf->states[new_state].core_frequency * 1000;
policy.max = perf->states[new_state].core_frequency * 1000;
result = cpufreq_set_policy(&policy);
if (result)
return_VALUE(result);
return_VALUE(count);
}
/**ltl
* 功能: 文件/proc/acpi/processor/CPU1/performance写操作函数，主要用来改变cpu的性能，写入参数为cpu的状态下标。
* 参数:
* 返回值:
* 说明:
*/
static ssize_t
acpi_processor_write_performance(struct file *file,
const char __user * buffer,
size_t count, loff_t * data)
{
int result = 0;
struct seq_file *m = (struct seq_file *)file->private_data;
struct acpi_processor *pr = (struct acpi_processor *)m->private;
struct acpi_processor_performance *perf;
char state_string[12] = { '\0' };
unsigned int new_state = 0;
struct cpufreq_policy policy;
if (!pr || (count > sizeof(state_string) - 1))
return -EINVAL;
perf = pr->performance;
if (!perf)
return -EINVAL;
if (copy_from_user(state_string, buffer, count))
return -EFAULT;
state_string[count] = '\0';
new_state = simple_strtoul(state_string, NULL, 0); /* 新的性能状态 */
if (new_state >= perf->state_count)
return -EINVAL;
/* 获取cpu id对应的cpu调频策略对象 */
cpufreq_get_policy(&policy, pr->id);
/* cpu ID */
policy.cpu = pr->id;
/* 此调频策略对应的频率 */
policy.min = perf->states[new_state].core_frequency * 1000;
policy.max = perf->states[new_state].core_frequency * 1000;
/* 设置cpu的调频策略 */
result = cpufreq_set_policy(&policy);
if (result)
return result;
return count;
}
static void __ref tplug_boost_work_fn(struct work_struct *work)
{
struct cpufreq_policy policy;
int cpu, ret;
for(cpu = 1; cpu < NR_CPUS; cpu++) {
#ifdef CONFIG_SCHED_HMP
if(tplug_hp_style == 1)
#else
if(tplug_hp_enabled == 1)
#endif
if(cpu_is_offline(cpu))
cpu_up(cpu);
ret = cpufreq_get_policy(&policy, cpu);
if (ret)
continue;
old_policy[cpu] = policy;
policy.min = policy.max;
cpufreq_update_policy(cpu);
}
if(stop_boost == 0)
queue_delayed_work_on(0, tplug_boost_wq, &tplug_boost,
msecs_to_jiffies(10));
}