速率单调
速率单调(RM)算法[1]是C. L. LIU(刘炯朗)和J. W. LAYLAND提出的单处理机实时周期性任务静态优先级调度算法。
该算法的按照任务的速率分配优先级。速率越大,优先级越高;速率越小,优先级越低。
C. L. LIU和J. W. LAYLAND给出了可行调度的充分非必要条件:
.
其中,是处理机使用率,是作业的计算时间,是任务的周期,是任务的数目。
参考文献
- LIU, C. L. and LAYLAND, J. W. 1973. Scheduling Algorithms for Multiprogramming in a Hard Real-time Environment. Journal of the ACM, Volume 20, Issue 1, pp. 46-61.
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