Linux Kernel调度管理之rt_rq

本文主要是介绍Linux Kernel调度管理之rt_rq，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

rt_rq是Linux内核为实时进程设计的就绪队列，当然它是为实时调度类准备的就绪队列：

/* Real-Time classes' related field in a runqueue: */
struct rt_rq {
	struct rt_prio_array active;
	unsigned int rt_nr_running;
	unsigned int rr_nr_running;
#if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED
	struct {
		int curr; /* highest queued rt task prio */
#ifdef CONFIG_SMP
		int next; /* next highest */
#endif
	} highest_prio;
#endif
#ifdef CONFIG_SMP
	unsigned long rt_nr_migratory;
	unsigned long rt_nr_total;
	int overloaded;
	struct plist_head pushable_tasks;
#ifdef HAVE_RT_PUSH_IPI
	int push_flags;
	int push_cpu;
	struct irq_work push_work;
	raw_spinlock_t push_lock;
#endif
#endif /* CONFIG_SMP */
	int rt_queued;
	int rt_throttled;
	u64 rt_time;
	u64 rt_runtime;
	/* Nests inside the rq lock: */
	raw_spinlock_t rt_runtime_lock;
#ifdef CONFIG_RT_GROUP_SCHED
	unsigned long rt_nr_boosted;
	struct rq *rq;
	struct task_group *tg;
#endif
};

注意，对于实时进程的就绪队列来说，其是内嵌在就绪队列rq中的。

也就是说，进程知道其调度策略也就知道其所在的就绪队列了。

这篇关于Linux Kernel调度管理之rt_rq的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---