速率单调和截止日期单调调度的区别

1.速率单调调度：
速率单调调度是一种优先级算法，根据循环时间为进程分配优先级，任务持续时间最短的进程获得优先级。它是抢占式的：最高优先级的进程将抢占其他进程。进程的优先级与其循环时间成反比。

2.截止日期单调调度：
最后期限单调调度是一种优先级算法，其中根据进程各自的最后期限将优先级分配给进程。截止日期是必须完成任务的时间限制。具有最短期限的进程被分配最高优先级。它也是先发制人的。进程的优先级与截止日期成反比。

速率单调调度和截止日期单调调度的区别：

Rate Monotonic Scheduling	Deadline Monotonic Scheduling
In Rate monotonic Scheduling, priorities are assigned to tasks according to the shortest cycle time	In Deadline monotonic Scheduling, priorities are assigned to tasks according to the shortest deadline.
Implementation of Rate monotonic scheduler is simple and can be executed using FIFO (First-in First-out) scheduling.	Implementation of Deadline monotonic scheduler is complicated and is time-taking process.
The choice of priority is decided based on the computation time or active frequency.	The choice of priority is decided based on which task is ready to be executed first.
Priority is inversely proportional to the cycle time.	Priority is inversely proportional to the deadline (time limit).
RMA is not optimal with periodic tasks when deadline and period differ.	DMA is more proficient than RMA when deadline and period differ.