再看sleep_on的163~164 这里又将tmp置为就绪态,也就意味着tmp所指向进程yyy可以运行;当进程yyy运行时,它又会唤醒后续的等待进程。 像链式反应一样,wake_up唤醒1,1唤醒2,2唤醒3…,直达该等待队列为空。 个人疑问:进程1获取资源后,运行,因时间片到时,转为就绪,并未释放资源;若调度程序选择了进程2执行,不还...
1. #define wake_up(x) __wake_up(x, TASK_NORMAL, 1, NULL) 2. #define wake_up_nr(x, nr) __wake_up(x, TASK_NORMAL, nr, NULL) 3. #define wake_up_all(x) __wake_up(x, TASK_NORMAL, 0, NULL) 4. #define wake_up_locked(x) __wake_up_locked((x), TASK_NORMAL) 5. 6....
for those interested in wake up timings of RT tasks. 2. wakeup tracer How-to $ adb shell cat /sys/kernel/debug/tracing/available_tracers function_graph wakeup_rt wakeup preemptirqsoff preemptoff irqsoff function nop $ adb shell "echo wakeup > /sys/kernel/debug/tracing/current_tracer" $ adb...
wake_up_interruptible_nr(x, nr) 唤醒x 队列中状态为“ TASK_INTERRUPTIBLE ”或 “TASK_UNINTERRUPTIBLE”的线程,只唤醒其中的一个线程 wake_up(x) 唤醒x 队列中状态为“ TASK_INTERRUPTIBLE”的线程,唤醒 其中的所有线程 wake_up_interruptible_all(x) 唤醒x 队列中状态为“ TASK_INTERRUPTIBLE ”或 “TASK_...
//kernel/sched/core.cwake_up_process->try_to_wake_up(p, TASK_NORMAL, 0) ->if (!(p->state & state)) //判断是否为特定状态的进程 goto unlock; ... cpu =select_task_rq(p, p->wake_cpu, SD_BALANCE_WAKE, wake_flags); //选择合适的cpu ...
Linux Kernel调度管理之唤醒进程并设定唤醒标识,intwake_up_state(structtask_struct*p,unsignedintstate){returntry_to_wake_up(p,state,0);}
我们可以使用wake_up_process将刚才那个进入睡眠的进程唤醒, 该函数定义在kernel/sched/core.c, line 2043. 代码语言:javascript 代码运行次数:0 运行 AI代码解释 intwake_up_process(struct task_struct*p){returntry_to_wake_up(p,TASK_NORMAL,0);} ...
//Create the kernel thread with name 'mythread' wait_thread = kthread_create(wait_function, NULL, "WaitThread"); if (wait_thread) { pr_info("Thread Created successfully "); wake_up_process(wait_thread); } else pr_info("Thread creation failed ...
wake_up_process(sleeping_task); 在调用了 wake_up_process 以后,这个睡眠进程的状态会被设置为 TASK_RUNNING,而且调度器会把它加入到运行队列中去。当然,这个进程只有在下次被调度器调度到的时候才能真正地投入运行。 无效唤醒 几乎在所有的情况下,进程都会在检查了某些条件之后,发现条件不满足才进入睡眠。可是有...
//kernel/sched/core.cwake_up_process->try_to_wake_up(p,TASK_NORMAL,0)->if(!(p->state&state))//判断是否为特定状态的进程goto unlock;...cpu=select_task_rq(p,p->wake_cpu,SD_BALANCE_WAKE,wake_flags);//选择合适的cpu...ttwu_queue(p,cpu,wake_flags)->ttwu_do_activate->int en_flag...