表驱动和循环调度的区别

时钟驱动调度是一种调度点由时钟中断决定的调度算法。时钟驱动调度有两种类型：

1. 表驱动调度：
在表驱动调度中，所有任务的开始时间都是预先计算好的，并在系统配置时存储在一个表中。存储所有任务调度时间的表称为调度表。

2. 循环调度：
在循环调度中，预先计算的调度会一次又一次地重复。任务集中的每个任务在每个循环中都以相同的方式重复。

表驱动和循环调度的区别：

TABLE-DRIVEN SCHEDULING	CYCLIC SCHEDULING
Start time of tasks is precomputed and thus tasks are scheduled.	Precomputed schedule is repeated again and again.
Each task is scheduled only once.	Each task is scheduled repeatedly.
Table-driven scheduling is less used in large applications.	Cyclic scheduling is quite often used in large applications.
It is not quite efficient.	It is efficient than table-driven.
It sets timer whenever a task is scheduled.	it sets timer only when system initiates scheduling.
It is not often used in embedded systems.	it is often used in embedded systems.
In case of selection of timing frame it is more proficient.	It is possible to select a large size of timing frame.