delayed_work是我们声明的工作队列;通过INIT_WORK对工作队列进行初始化,delayed_work_handler是工作队列的处 理函数,data是传递给处理函数的参数;最后调用schedule_work唤醒工作者线程处理推后执行的工作。如果需要经过一段延迟以后再执行工作, 可以调用: schedule_delayed_work(delayed_work, delay); //delay 是需要延...
schedule_delayed_work 1/**2* schedule_delayed_work - put work task in global workqueue after delay3* @dwork: job to be done4* @delay: number of jiffies to wait or 0 for immediate execution5*6* After waiting for a given time this puts a job in the kernel-global7* workqueue.8*/9s...
schedule_delayed_work(delayed_work,jiffies); 对于驱动开发者而言,工作的配置就已经完成了,work_struct->func 将会由系统在将来的某个时刻调度执行。 其中,schedule_work 的实现是这样的: static inline bool schedule_work(struct work_struct *work) { return queue_work(system_wq, work); } 该接口调用了 q...
任何通过schedule_delayed_work()调度的工作,如果其延迟时间未结束,它并不会因为调用flush_scheduled_work()而被刷新掉。 取消延迟执行的工作,应该调用: /* 取消延迟执行的工作 */intcancel_delayed_work(structwork_struct*work); 该函数取消任何与work_struct相关的挂起工作。 大部分驱动程序使用默认工作者线程event...
schedule_delayed_work(&ofndata.x_work, msecs_to_jiffies(20)); 1. 首次调用之后,该函数开始循环间隔40ms时间执行,即自己调用自己: static void ofn_x_work_func(struct work_struct *work) { ofn_ppg(); schedule_delayed_work(&ofndata.x_work, msecs_to_jiffies(40)); ...
3. 调度自己的小任务通过调用tasklet_schedule()函数并传递给它相应的tasklt_struct指针,该小任务就会被调度以便适当的时候执行: 代码语言:javascript 代码运行次数:0 复制 Cloud Studio代码运行 tasklet_schedule(&my_tasklet);/*把my_tasklet标记为挂起 */ ...
schedule_delayed_work:有时候你并不希望工作马上就被执行,而是希望它经过一段延迟以后再执行。在这种情况下,你可以调度它在指定的时间执行: 这时,&work指向的work_struct直到delay指定的时钟节拍用完以后才会执行。在后面“内核同步”的文章将介绍这种使用时钟节拍作为时间单位的方法。
* system_wq is the one used by schedule[_delayed]_work[_on](). * Multi-CPU multi-threaded. There are users which expect relatively * short queue flush time. Don't queue works which can run for too * long. * * system_highpri_wq is similar to system_wq but for work items which ...
int schedule_delayed_work(struct work_struct *work, unsigned long delay);如果你看从这 2 个设备的输出, 它看来如: % cat /proc/jiqwq time delta preempt pid cpu command % cat /proc/jiqwqdelay time delta preempt pid cpu command 1122066 1 0 6 0 events/0 ...
/** System-wide workqueues which are always present.** system_wqisthe one usedbyschedule[_delayed]_work[_on]().* Multi-CPU multi-threaded. There are users which expect relatively* short queue flushtime. Don't queue works which can runfortoo* long.** system_highpri_wqissimilartosystem...