}
/*
- * The margin used when comparing utilization with CPU capacity:
- * util * margin < capacity * 1024
+ * The margin used when comparing utilization with CPU capacity.
*
* (default: ~20%)
*/
-static unsigned int capacity_margin = 1280;
+#define fits_capacity(cap, max) ((cap) * 1280 < (max) * 1024)
+
#endif
#ifdef CONFIG_CFS_BANDWIDTH
static inline int task_fits_capacity(struct task_struct *p, long capacity)
{
- return capacity * 1024 > task_util_est(p) * capacity_margin;
+ return fits_capacity(task_util_est(p), capacity);
}
static inline void update_misfit_status(struct task_struct *p, struct rq *rq)
static inline bool cpu_overutilized(int cpu)
{
- return (capacity_of(cpu) * 1024) < (cpu_util(cpu) * capacity_margin);
+ return !fits_capacity(cpu_util(cpu), capacity_of(cpu));
}
static inline void update_overutilized_status(struct rq *rq)
/* Skip CPUs that will be overutilized. */
util = cpu_util_next(cpu, p, cpu);
cpu_cap = capacity_of(cpu);
- if (cpu_cap * 1024 < util * capacity_margin)
+ if (!fits_capacity(util, cpu_cap))
continue;
/* Always use prev_cpu as a candidate. */
static inline bool
group_smaller_min_cpu_capacity(struct sched_group *sg, struct sched_group *ref)
{
- return sg->sgc->min_capacity * capacity_margin <
- ref->sgc->min_capacity * 1024;
+ return fits_capacity(sg->sgc->min_capacity, ref->sgc->min_capacity);
}
/*
static inline bool
group_smaller_max_cpu_capacity(struct sched_group *sg, struct sched_group *ref)
{
- return sg->sgc->max_capacity * capacity_margin <
- ref->sgc->max_capacity * 1024;
+ return fits_capacity(sg->sgc->max_capacity, ref->sgc->max_capacity);
}
static inline enum