| Message ID | 1431459549-18343-20-git-send-email-morten.rasmussen@arm.com (mailing list archive) |
|---|---|
| State | RFC |
| Headers | show |
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 5980bdd..4a8404a 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4776,6 +4776,17 @@ static long effective_load(struct task_group *tg, int cpu, long wl, long wg) #endif +/* + * Returns the current capacity of cpu after applying both + * cpu and freq scaling. + */ +static unsigned long capacity_curr_of(int cpu) +{ + return cpu_rq(cpu)->cpu_capacity_orig * + arch_scale_freq_capacity(NULL, cpu) + >> SCHED_CAPACITY_SHIFT; +} + static inline bool energy_aware(void) { return sched_feat(ENERGY_AWARE);
capacity_orig_of() returns the max available compute capacity of a cpu. For scale-invariant utilization tracking and energy-aware scheduling decisions it is useful to know the compute capacity available at the current OPP of a cpu. cc: Ingo Molnar <mingo@redhat.com> cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com> --- kernel/sched/fair.c | 11 +++++++++++ 1 file changed, 11 insertions(+)