struct worker_pool { spinlock_t lock; int cpu; int node; int id; unsigned int flags; struct list_head worklist; int nr_workers; ... struct work_struct { atomic_long_t data; struct list_head entry; work_func_t func; struct lockdep_map lockdep_map; }; kworker 线程调度 workqueues,原...
struct worker_pool { spinlock_t lock; int cpu; int node; int id; unsigned int flags; struct list_head worklist; int nr_workers; ... struct work_struct { atomic_long_t data; struct list_head entry; work_func_t func; struct lockdep_map lockdep_map; }; kworker 线程调度 workqueues,原...
cpu_workqueue_struct{ spinlock_t lock; atomic_t nr_queued; struct list_head worklist; wait_queue_head_t more_work; wait_queue_head_t work_done; struct workqueue_struct *wq; task_t * thread ; struct completion exti; } 2.表示工作的数据结构:所有的工作者线程都是用普通的内核线程来实现的,...
软中断只能被硬件中断抢占，不会被其他软中断抢占。在多核系统中，同一种软中断处理可以分布到不同CPU上，利用多核并行性提高性能。然而，处理函数中包含全局变量可能导致多核同步问题，如spinlock，增加复杂性。软中断可以被屏蔽，屏蔽机制类似于信号处理，使用local_bh_disable()函数实现。屏蔽期间，虽然...
在多核系统中，同一种软中断处理可以分布到不同CPU上，利用多核并行性提高性能。处理函数中包含全局变量可能导致多核同步问题，如使用spinlock，增加了复杂性。软中断处理策略：软中断的处理策略侧重于减少延迟和提高实时性。通过合理配置和管理，可以最大化软中断的性能优势，同时保证系统稳定性和响应性。
he makes it with spinlocks.*/structtasklet_struct {structtasklet_struct *next;//多个tasklet串成一个链表unsignedlongstate;//TASKLET_STATE_SCHEDatomic_t count;//0 表示tasklet 处于激活状态,非0 表示禁止,不允许执行void(*func)(unsignedlong); ...
by its own spinlocks. - Even if softirq is serialized, only local cpu is marked for execution. Hence, we get something sort of weak cpu binding. Though it is still not clear, will it result in better locality or will not. Examples: - NET RX softirq. It is multithreaded and does...
#include <linux/irq.h>#define CREATE_TRACE_POINTS #include <trace/events/irq.h>/* - No shared variables, all the data are CPU local. - If a softirq needs serialization, let it serialize itself by its own spinlocks. - Even if softirq is serialized, only local cpu is marked for ex...
35 by its own spinlocks. 36 - Even if softirq is serialized, only local cpu is marked for 37 execution. Hence, we get something sort of weak cpu binding. 38 Though it is still not clear, will it result in better locality 39 or will not. 40 41 Examples: 42 - NET RX so...
spinlock_t lock;//保护数据的lock struct list_head worklist;//挂起链表的头结点,集中了工作队列中所有挂起函数。 wait_queue_head_t more_work;//等待队列,其中的工作者线程因为等待工作而处于休眠 struct work_struct *current_work;//等待队列,其中的进程由于等待工作队列被刷新而处于休眠。