s64 delta_ns;
/*
- * If the CPU utilization was last updated before the previous
- * frequency update and the time elapsed between the last update
- * of the CPU utilization and the last frequency update is long
- * enough, don't take the CPU into account as it probably is
- * idle now (and clear iowait_boost for it).
+ * If the CFS CPU utilization was last updated before the
+ * previous frequency update and the time elapsed between the
+ * last update of the CPU utilization and the last frequency
+ * update is long enough, reset iowait_boost and util_cfs, as
+ * they are now probably stale. However, still consider the
+ * CPU contribution if it has some DEADLINE utilization
+ * (util_dl).
*/
delta_ns = time - j_sg_cpu->last_update;
if (delta_ns > TICK_NSEC) {
j_sg_cpu->iowait_boost = 0;
j_sg_cpu->iowait_boost_pending = false;
- continue;
+ j_sg_cpu->util_cfs = 0;
+ if (j_sg_cpu->util_dl == 0)
+ continue;
}
if (j_sg_cpu->flags & SCHED_CPUFREQ_RT)
return policy->cpuinfo.max_freq;