---
kernel/sched/idle.c | 10 ++++++++++
kernel/sched/sched.h | 13 +++++++++++++
2 files changed, 23 insertions(+)
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index d17b0a5ce6ac..cc538acb3f1a 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -258,15 +258,25 @@ static void cpuidle_idle_call(void)
*
* Called with polling cleared.
*/
+DEFINE_PER_CPU(u64, last_util_update_time); /* in jiffies */
static void do_idle(void)
{
int cpu = smp_processor_id();
+ u64 expire;
/*
* Check if we need to update blocked load
*/
nohz_run_idle_balance(cpu);
+#ifdef CONFIG_X86_INTEL_PSTATE
+ expire = __this_cpu_read(last_util_update_time) + HZ * 3;
+ if (unlikely(time_is_before_jiffies(expire))) {
+ idle_update_util();
+ __this_cpu_write(last_util_update_time, get_jiffies_64());
+ }
+#endif
+
/*
* If the arch has a polling bit, we maintain an invariant:
*
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 0e66749486e7..2a8d87988d1f 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -2809,6 +2809,19 @@ static inline void cpufreq_update_util(struct rq *rq, unsigned int flags)
if (data)
data->func(data, rq_clock(rq), flags);
}
+
+static inline void idle_update_util(void)
+{
+ struct update_util_data *data;
+ struct rq *rq = cpu_rq(raw_smp_processor_id());
+
+ data = rcu_dereference_sched(*per_cpu_ptr(&cpufreq_update_util_data,
+ cpu_of(rq)));
+ if (data)
+ data->func(data, rq_clock(rq), 0);
+}
+
+
#else
static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) {}
#endif /* CONFIG_CPU_FREQ */
--
2.25.1
