diff options
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index d6d488e8eb55..5f18460f62f0 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1041,6 +1041,7 @@ struct rq { unsigned long cpu_capacity; unsigned long cpu_capacity_orig; + unsigned long cpu_capacity_inverted; struct balance_callback *balance_callback; @@ -2878,6 +2879,24 @@ static inline unsigned long capacity_orig_of(int cpu) return cpu_rq(cpu)->cpu_capacity_orig; } +/* + * Returns inverted capacity if the CPU is in capacity inversion state. + * 0 otherwise. + * + * Capacity inversion detection only considers thermal impact where actual + * performance points (OPPs) gets dropped. + * + * Capacity inversion state happens when another performance domain that has + * equal or lower capacity_orig_of() becomes effectively larger than the perf + * domain this CPU belongs to due to thermal pressure throttling it hard. + * + * See comment in update_cpu_capacity(). + */ +static inline unsigned long cpu_in_capacity_inversion(int cpu) +{ + return cpu_rq(cpu)->cpu_capacity_inverted; +} + /** * enum cpu_util_type - CPU utilization type * @FREQUENCY_UTIL: Utilization used to select frequency |