static void update_curr(struct cfs_rq *cfs_rq) { struct sched_entity *curr = cfs_rq->curr; u64 now = rq_of(cfs_rq)->clock_task; unsigned long delta_exec; if (unlikely(!curr)) return; /* * Get the amount of time the current task was running * since the last time we changed...
static void update_curr(struct cfs_rq *cfs_rq) { struct sched_entity *curr = cfs_rq->curr; u64 now = rq_of(cfs_rq)->clock_task; unsigned long delta_exec; if (unlikely(!curr)) return; /* * Get the amount of time the current task was running * since the last time we changed...
struct capture_control; struct cfs_rq; struct fs_struct; struct futex_pi_state; struct io_context; struct mempolicy; struct nameidata; struct nsproxy; struct perf_event_context; struct pid_namespace; struct pipe_inode_info; struct rcu_node; struct reclaim_state; struct robust_list_head; struc...
#ifdef CONFIG_FAIR_GROUP_SCHEDintdepth;structsched_entity *parent;/*rq on which this entity is (to be) queued:*/structcfs_rq *cfs_rq;/*rq "owned" by this entity/group:*/structcfs_rq *my_q;#endif#ifdef CONFIG_SMP/** Per entity load average tracking. * * Put into separate cache ...
However: * * p->XXX = X; ttwu() * schedule() if (p->on_rq && ..) // false * smp_mb__after_spinlock(); if (smp_load_acquire(&p->on_cpu) && //true * deactivate_task() ttwu_queue_wakelist()) * p->on_rq = 0; p->sched_remote_wakeup = Y; * * guarantees all ...
void(*yield_task)(struct rq*rq); 源码路径 :linux-5.6.18\kernel\sched\sched.h#1717 ; 二、check_preempt_curr 函数 ( 检查进程是否可以被抢占 ) sched_class调度类结构体 中的check_preempt_curr函数指针 , 指向一个函数 , 调用该函数 , 主要是检查 当前 " 进程 " 是否可以被 其它进程 抢占 ; ...
。前面的优化是说如果所有的进程都在CFS调度类中,则可以直接调用fair_sched_class中的pick_next_task_fair函数找出下一个要运行的进程。这个函数前面分析过。 (5)调度信息...need_resched标志,则需要重新调度进程。先获取cpu和rq,当前进程成为prev进程,清除它的调度位。cpu_rq()函数在sched.c中定义为一个宏: ...
3、These are changes in struct cfs_rq. 4、Listing 1. Important fields from struct key. 5、Unlike the struct dirent that readdir() returns, struct stat has quite a few standard, required members 6、class contradiction and non-class contradiction ...
static __always_inline struct rq *context_switch(struct rq *rq, struct task_struct *prev,struct task_struct *next, struct rq_flags *rf) 这样,通过context_switch函数就可以将当前进程调度出去,而将新的进程调度进来。 context_switch最终会调度到一个平台相关的函数,而这个函数是汇编语言实现的,主要实现...
区分对task不同的处理:RT / DL / CFS在每个CPU上rq中,存在描述Task对象的结构体,即task_struct支持Taskgroup的机制后,将Task抽象为... uninterruptible的数量 在对应实现中添加全局变量,统计完整系统的数值; 1.结构关系图示 2.结构体目录目录结构体/kernel-4.9/kernel/sched/sched.hrq ...