!cpufreq_this_cpu_can_update(sg_policy->policy))
return false;
- if (unlikely(sg_policy->need_freq_update))
+ if (unlikely(sg_policy->limits_changed)) {
+ sg_policy->limits_changed = false;
+ sg_policy->need_freq_update = true;
return true;
+ }
+ /* No need to recalculate next freq for min_rate_limit_us
+ * at least. However we might still decide to further rate
+ * limit once frequency change direction is decided, according
+ * to the separate rate limits.
+ */
+
delta_ns = time - sg_policy->last_freq_update_time;
+ return delta_ns >= sg_policy->min_rate_limit_ns;
+}
+
+static bool sugov_up_down_rate_limit(struct sugov_policy *sg_policy, u64 time,
+ unsigned int next_freq)
+{
+ s64 delta_ns;
+
+ delta_ns = time - sg_policy->last_freq_update_time;
+
+ if (next_freq > sg_policy->next_freq &&
+ delta_ns < sg_policy->up_rate_delay_ns)
+ return true;
- return delta_ns >= sg_policy->freq_update_delay_ns;
+ if (next_freq < sg_policy->next_freq &&
+ delta_ns < sg_policy->down_rate_delay_ns)
+ return true;
+
+ return false;
}
static bool sugov_update_next_freq(struct sugov_policy *sg_policy, u64 time,
mutex_unlock(&sg_policy->work_lock);
}
- sg_policy->need_freq_update = true;
+ sg_policy->limits_changed = true;
}
-static struct cpufreq_governor schedutil_gov = {
+struct cpufreq_governor schedutil_gov = {
.name = "schedutil",
.owner = THIS_MODULE,
.dynamic_switching = true,
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