From: Morten Rasmussen <[email protected]> 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 <[email protected]> cc: Peter Zijlstra <[email protected]> Signed-off-by: Morten Rasmussen <[email protected]> Signed-off-by: Steve Muckle <[email protected]> --- kernel/sched/fair.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 7ce24a4..3437e01 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4821,6 +4821,17 @@ 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; +} + +/* * Detect M:N waker/wakee relationships via a switching-frequency heuristic. * A waker of many should wake a different task than the one last awakened * at a frequency roughly N times higher than one of its wakees. In order -- 2.4.10
