Description: 1) first-come-first-served (FCFS) scheduling algorithm, that is the priority job arrives scheduling. Always the first to wait for the longest time job scheduling system. 2) short operating priority (SJF) scheduling algorithm, priority scheduling requirements of the job with the shortest running time. 3) response than the high priority (HRRN) scheduling algorithm, set a priority for each job (Response Ratio), calculated for various jobs before scheduling priority, priority number of high-priority scheduling. RP (response ratio) = the operating turnaround time/job run time for each job by a job control block JCB JCB can contain the following information: job name, submitted (arrival) time, the running time required, the necessary resources, job status, and chain pointers. The status of the job can be waiting for W (Wait), one of three run R (Run) and the completion of F (Finish). The initial state of each job is waiting for W.
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实验2 作业调度.doc
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