时钟驱动和事件驱动调度的区别

操作系统可以使用各种调度算法来调度实时任务。这些调度算法根据调度点的确定进行分类。

1. 时钟驱动调度：
调度点由从时钟接收的中断决定的调度，称为时钟驱动调度。时钟驱动调度处理接下来要处理的任务取决于时钟中断点。

2. 事件驱动调度：
调度点由不包括时钟中断的事件发生确定的调度，称为事件驱动调度。事件驱动调度处理接下来要处理的任务与时钟中断点无关。

时钟驱动和事件驱动调度的区别：

CLOCK-DRIVEN SCHEDULING	EVENT-DRIVEN SCHEDULING
Tasks are scheduled on the basis of interrupts received by clock.	Tasks are scheduled on the basis of event occurrences excluding clock interrupts.
Scheduling points are determined by clock interrupts.	Scheduling points are determined by task completion and task arrival events.
Clock-driven scheduling algorithms are simple.	Event-driven scheduling algorithms are very complex.
Clock-driven scheduling is not flexible as event-driven.	Event-driven scheduling is more flexible than clock-driven.
It can only handle periodic tasks.	It can schedule periodic, sporadic and aperiodic tasks.
It is called offline scheduling.	It is called online scheduling.
It is widely used in embedded systems.	It is less suitable for embedded systems.
It is efficient than event-driven.	It is sophisticated but more proficient.
It is used in small applications.	It is used in larger applications.