PREEMPTIVE LCFS SCHEDULING IN HARD REAL-TIME APPLICATIONS

被引:3
|
作者
BLIEBERGER, J [1 ]
SCHMID, U [1 ]
机构
[1] VIENNA TECH UNIV,DEPT AUTOMAT 1831,A-1040 VIENNA,AUSTRIA
关键词
REAL-TIME BEHAVIOR; LCFS SCHEDULING; TREES; PROBABILITY GENERATING FUNCTIONS; SINGULARITY ANALYSIS; ASYMPTOTICS;
D O I
10.1016/0166-5316(92)90035-F
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
We investigate the real-time behaviour of a (discrete time) single server system with preemptive LCFS task scheduling. The main result deals with the probability distribution of a random variable SRD(T), which describes the time the system operates without violating a fixed task service time deadline T. The tree approach, used for the derivation of our results, is also suitable for revisiting problems in queueing theory. Relying on a simple general probability model, asymptotic formulas concerning all moments of SRD(T) are determined; for instance, the expectation of SRD(T) is proved to grow exponentially in T, i.e., E[SRD(T)] is similar to Crho(T)T3/2 for some rho > 1.
引用
收藏
页码:203 / 215
页数:13
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