#include <linux/ktime.h>
#include <linux/rwsem.h>
#include <linux/wait.h>
+#include <linux/topology.h>
#include <acpi/cppc_acpi.h>
return result;
}
+ bool acpi_cpc_valid(void)
+ {
+ struct cpc_desc *cpc_ptr;
+ int cpu;
+
+ for_each_possible_cpu(cpu) {
+ cpc_ptr = per_cpu(cpc_desc_ptr, cpu);
+ if (!cpc_ptr)
+ return false;
+ }
+
+ return true;
+ }
+ EXPORT_SYMBOL_GPL(acpi_cpc_valid);
+
/**
- * acpi_get_psd_map - Map the CPUs in a common freq domain.
- * @all_cpu_data: Ptrs to CPU specific CPPC data including PSD info.
+ * acpi_get_psd_map - Map the CPUs in the freq domain of a given cpu
+ * @cpu: Find all CPUs that share a domain with cpu.
+ * @cpu_data: Pointer to CPU specific CPPC data including PSD info.
*
* Return: 0 for success or negative value for err.
*/
- int acpi_get_psd_map(struct cppc_cpudata **all_cpu_data)
+ int acpi_get_psd_map(unsigned int cpu, struct cppc_cpudata *cpu_data)
{
- int count_target;
- int retval = 0;
- unsigned int i, j;
- cpumask_var_t covered_cpus;
- struct cppc_cpudata *pr, *match_pr;
- struct acpi_psd_package *pdomain;
- struct acpi_psd_package *match_pdomain;
struct cpc_desc *cpc_ptr, *match_cpc_ptr;
-
- if (!zalloc_cpumask_var(&covered_cpus, GFP_KERNEL))
- return -ENOMEM;
+ struct acpi_psd_package *match_pdomain;
+ struct acpi_psd_package *pdomain;
+ int count_target, i;
/*
* Now that we have _PSD data from all CPUs, let's setup P-state
* domain info.
*/
- for_each_possible_cpu(i) {
- if (cpumask_test_cpu(i, covered_cpus))
- continue;
-
- pr = all_cpu_data[i];
- cpc_ptr = per_cpu(cpc_desc_ptr, i);
- if (!cpc_ptr) {
- retval = -EFAULT;
- goto err_ret;
- }
+ cpc_ptr = per_cpu(cpc_desc_ptr, cpu);
+ if (!cpc_ptr)
+ return -EFAULT;
- pdomain = &(cpc_ptr->domain_info);
- cpumask_set_cpu(i, pr->shared_cpu_map);
- cpumask_set_cpu(i, covered_cpus);
- if (pdomain->num_processors <= 1)
- continue;
+ pdomain = &(cpc_ptr->domain_info);
+ cpumask_set_cpu(cpu, cpu_data->shared_cpu_map);
+ if (pdomain->num_processors <= 1)
+ return 0;
- /* Validate the Domain info */
- count_target = pdomain->num_processors;
- if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL)
- pr->shared_type = CPUFREQ_SHARED_TYPE_ALL;
- else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL)
- pr->shared_type = CPUFREQ_SHARED_TYPE_HW;
- else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY)
- pr->shared_type = CPUFREQ_SHARED_TYPE_ANY;
-
- for_each_possible_cpu(j) {
- if (i == j)
- continue;
-
- match_cpc_ptr = per_cpu(cpc_desc_ptr, j);
- if (!match_cpc_ptr) {
- retval = -EFAULT;
- goto err_ret;
- }
+ /* Validate the Domain info */
+ count_target = pdomain->num_processors;
+ if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL)
+ cpu_data->shared_type = CPUFREQ_SHARED_TYPE_ALL;
+ else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL)
+ cpu_data->shared_type = CPUFREQ_SHARED_TYPE_HW;
+ else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY)
+ cpu_data->shared_type = CPUFREQ_SHARED_TYPE_ANY;
- match_pdomain = &(match_cpc_ptr->domain_info);
- if (match_pdomain->domain != pdomain->domain)
- continue;
+ for_each_possible_cpu(i) {
+ if (i == cpu)
+ continue;
- /* Here i and j are in the same domain */
- if (match_pdomain->num_processors != count_target) {
- retval = -EFAULT;
- goto err_ret;
- }
+ match_cpc_ptr = per_cpu(cpc_desc_ptr, i);
+ if (!match_cpc_ptr)
+ goto err_fault;
- if (pdomain->coord_type != match_pdomain->coord_type) {
- retval = -EFAULT;
- goto err_ret;
- }
+ match_pdomain = &(match_cpc_ptr->domain_info);
+ if (match_pdomain->domain != pdomain->domain)
+ continue;
- cpumask_set_cpu(j, covered_cpus);
- cpumask_set_cpu(j, pr->shared_cpu_map);
- }
+ /* Here i and cpu are in the same domain */
+ if (match_pdomain->num_processors != count_target)
+ goto err_fault;
- for_each_cpu(j, pr->shared_cpu_map) {
- if (i == j)
- continue;
+ if (pdomain->coord_type != match_pdomain->coord_type)
+ goto err_fault;
- match_pr = all_cpu_data[j];
- match_pr->shared_type = pr->shared_type;
- cpumask_copy(match_pr->shared_cpu_map,
- pr->shared_cpu_map);
- }
+ cpumask_set_cpu(i, cpu_data->shared_cpu_map);
}
- goto out;
- err_ret:
- for_each_possible_cpu(i) {
- pr = all_cpu_data[i];
+ return 0;
- /* Assume no coordination on any error parsing domain info */
- cpumask_clear(pr->shared_cpu_map);
- cpumask_set_cpu(i, pr->shared_cpu_map);
- pr->shared_type = CPUFREQ_SHARED_TYPE_ALL;
- }
- out:
- free_cpumask_var(covered_cpus);
- return retval;
+ err_fault:
+ /* Assume no coordination on any error parsing domain info */
+ cpumask_clear(cpu_data->shared_cpu_map);
+ cpumask_set_cpu(cpu, cpu_data->shared_cpu_map);
+ cpu_data->shared_type = CPUFREQ_SHARED_TYPE_NONE;
+
+ return -EFAULT;
}
EXPORT_SYMBOL_GPL(acpi_get_psd_map);
* }
*/
+#ifndef init_freq_invariance_cppc
+static inline void init_freq_invariance_cppc(void) { }
+#endif
+
/**
* acpi_cppc_processor_probe - Search for per CPU _CPC objects.
* @pr: Ptr to acpi_processor containing this CPU's logical ID.
goto out_free;
}
+ init_freq_invariance_cppc();
+
kfree(output.pointer);
return 0;
unsigned int iowait_boost;
u64 last_update;
+ unsigned long util;
unsigned long bw_dl;
unsigned long max;
return min(max, util);
}
- static unsigned long sugov_get_util(struct sugov_cpu *sg_cpu)
+ static void sugov_get_util(struct sugov_cpu *sg_cpu)
{
struct rq *rq = cpu_rq(sg_cpu->cpu);
- unsigned long util = cpu_util_cfs(rq);
unsigned long max = arch_scale_cpu_capacity(sg_cpu->cpu);
sg_cpu->max = max;
sg_cpu->bw_dl = cpu_bw_dl(rq);
-
- return schedutil_cpu_util(sg_cpu->cpu, util, max, FREQUENCY_UTIL, NULL);
+ sg_cpu->util = schedutil_cpu_util(sg_cpu->cpu, cpu_util_cfs(rq), max,
+ FREQUENCY_UTIL, NULL);
}
/**
* sugov_iowait_apply() - Apply the IO boost to a CPU.
* @sg_cpu: the sugov data for the cpu to boost
* @time: the update time from the caller
- * @util: the utilization to (eventually) boost
- * @max: the maximum value the utilization can be boosted to
*
* A CPU running a task which woken up after an IO operation can have its
* utilization boosted to speed up the completion of those IO operations.
* This mechanism is designed to boost high frequently IO waiting tasks, while
* being more conservative on tasks which does sporadic IO operations.
*/
- static unsigned long sugov_iowait_apply(struct sugov_cpu *sg_cpu, u64 time,
- unsigned long util, unsigned long max)
+ static void sugov_iowait_apply(struct sugov_cpu *sg_cpu, u64 time)
{
unsigned long boost;
/* No boost currently required */
if (!sg_cpu->iowait_boost)
- return util;
+ return;
/* Reset boost if the CPU appears to have been idle enough */
if (sugov_iowait_reset(sg_cpu, time, false))
- return util;
+ return;
if (!sg_cpu->iowait_boost_pending) {
/*
sg_cpu->iowait_boost >>= 1;
if (sg_cpu->iowait_boost < IOWAIT_BOOST_MIN) {
sg_cpu->iowait_boost = 0;
- return util;
+ return;
}
}
sg_cpu->iowait_boost_pending = false;
/*
- * @util is already in capacity scale; convert iowait_boost
+ * sg_cpu->util is already in capacity scale; convert iowait_boost
* into the same scale so we can compare.
*/
- boost = (sg_cpu->iowait_boost * max) >> SCHED_CAPACITY_SHIFT;
- return max(boost, util);
+ boost = (sg_cpu->iowait_boost * sg_cpu->max) >> SCHED_CAPACITY_SHIFT;
+ if (sg_cpu->util < boost)
+ sg_cpu->util = boost;
}
#ifdef CONFIG_NO_HZ_COMMON
sg_policy->limits_changed = true;
}
- static void sugov_update_single(struct update_util_data *hook, u64 time,
- unsigned int flags)
+ static inline bool sugov_update_single_common(struct sugov_cpu *sg_cpu,
+ u64 time, unsigned int flags)
{
- struct sugov_cpu *sg_cpu = container_of(hook, struct sugov_cpu, update_util);
struct sugov_policy *sg_policy = sg_cpu->sg_policy;
- unsigned long util, max;
- unsigned int next_f;
- unsigned int cached_freq = sg_policy->cached_raw_freq;
sugov_iowait_boost(sg_cpu, time, flags);
sg_cpu->last_update = time;
ignore_dl_rate_limit(sg_cpu, sg_policy);
if (!sugov_should_update_freq(sg_policy, time))
+ return false;
+
+ sugov_get_util(sg_cpu);
+ sugov_iowait_apply(sg_cpu, time);
+
+ return true;
+ }
+
+ static void sugov_update_single_freq(struct update_util_data *hook, u64 time,
+ unsigned int flags)
+ {
+ struct sugov_cpu *sg_cpu = container_of(hook, struct sugov_cpu, update_util);
+ struct sugov_policy *sg_policy = sg_cpu->sg_policy;
+ unsigned int cached_freq = sg_policy->cached_raw_freq;
+ unsigned int next_f;
+
+ if (!sugov_update_single_common(sg_cpu, time, flags))
return;
- util = sugov_get_util(sg_cpu);
- max = sg_cpu->max;
- util = sugov_iowait_apply(sg_cpu, time, util, max);
- next_f = get_next_freq(sg_policy, util, max);
+ next_f = get_next_freq(sg_policy, sg_cpu->util, sg_cpu->max);
/*
* Do not reduce the frequency if the CPU has not been idle
* recently, as the reduction is likely to be premature then.
}
}
+ static void sugov_update_single_perf(struct update_util_data *hook, u64 time,
+ unsigned int flags)
+ {
+ struct sugov_cpu *sg_cpu = container_of(hook, struct sugov_cpu, update_util);
+ unsigned long prev_util = sg_cpu->util;
+
+ /*
+ * Fall back to the "frequency" path if frequency invariance is not
+ * supported, because the direct mapping between the utilization and
+ * the performance levels depends on the frequency invariance.
+ */
+ if (!arch_scale_freq_invariant()) {
+ sugov_update_single_freq(hook, time, flags);
+ return;
+ }
+
+ if (!sugov_update_single_common(sg_cpu, time, flags))
+ return;
+
+ /*
+ * Do not reduce the target performance level if the CPU has not been
+ * idle recently, as the reduction is likely to be premature then.
+ */
+ if (sugov_cpu_is_busy(sg_cpu) && sg_cpu->util < prev_util)
+ sg_cpu->util = prev_util;
+
+ cpufreq_driver_adjust_perf(sg_cpu->cpu, map_util_perf(sg_cpu->bw_dl),
+ map_util_perf(sg_cpu->util), sg_cpu->max);
+
+ sg_cpu->sg_policy->last_freq_update_time = time;
+ }
+
static unsigned int sugov_next_freq_shared(struct sugov_cpu *sg_cpu, u64 time)
{
struct sugov_policy *sg_policy = sg_cpu->sg_policy;
struct sugov_cpu *j_sg_cpu = &per_cpu(sugov_cpu, j);
unsigned long j_util, j_max;
- j_util = sugov_get_util(j_sg_cpu);
+ sugov_get_util(j_sg_cpu);
+ sugov_iowait_apply(j_sg_cpu, time);
+ j_util = j_sg_cpu->util;
j_max = j_sg_cpu->max;
- j_util = sugov_iowait_apply(j_sg_cpu, time, j_util, j_max);
if (j_util * max > j_max * util) {
util = j_util;
static int sugov_start(struct cpufreq_policy *policy)
{
struct sugov_policy *sg_policy = policy->governor_data;
+ void (*uu)(struct update_util_data *data, u64 time, unsigned int flags);
unsigned int cpu;
sg_policy->freq_update_delay_ns = sg_policy->tunables->rate_limit_us * NSEC_PER_USEC;
sg_cpu->sg_policy = sg_policy;
}
+ if (policy_is_shared(policy))
+ uu = sugov_update_shared;
+ else if (policy->fast_switch_enabled && cpufreq_driver_has_adjust_perf())
+ uu = sugov_update_single_perf;
+ else
+ uu = sugov_update_single_freq;
+
for_each_cpu(cpu, policy->cpus) {
struct sugov_cpu *sg_cpu = &per_cpu(sugov_cpu, cpu);
- cpufreq_add_update_util_hook(cpu, &sg_cpu->update_util,
- policy_is_shared(policy) ?
- sugov_update_shared :
- sugov_update_single);
+ cpufreq_add_update_util_hook(cpu, &sg_cpu->update_util, uu);
}
return 0;
}
cpufreq_governor_init(schedutil_gov);
#ifdef CONFIG_ENERGY_MODEL
-extern bool sched_energy_update;
-extern struct mutex sched_energy_mutex;
-
static void rebuild_sd_workfn(struct work_struct *work)
{
- mutex_lock(&sched_energy_mutex);
- sched_energy_update = true;
- rebuild_sched_domains();
- sched_energy_update = false;
- mutex_unlock(&sched_energy_mutex);
+ rebuild_sched_domains_energy();
}
static DECLARE_WORK(rebuild_sd_work, rebuild_sd_workfn);
OSDN Git Service
