4.2.2 OS之磁盘调度算法(FCFS、SSTF、SCAN、LOOK、S-SCAN、C-LOOK),程序员大本营,技术文章内容聚合第一站。
void FCFS(program pro[],int num){ printf("进程到达时间服务时间开始时间完成时间周转时间带权周转时间\n");sortWithEnterTime(pro,num);//按照到达顺序排序 programQueue* queue =(programQueue*)malloc(sizeof(programQueue));Queueinit(queue);//初始化进程就绪队列 EnterQueue(queue,&pro[0]);//将第...
对于先到先服务调度策略FCFS的实现在函数fcfs中实现,通过先进先出的队列可以实现,将新的线程任务队列节点插入到调度队列的尾部即可。 对于抢占式的最短作业优先调度策略的实现在函数pem_sjf_push中实现,抢占式有机会插在已经存在的头结点前面,作为新的头结点被调度器调度执行,只需要在调度队列中找到WCT恰好小于自己的...
先来先服务(FCFS):按照任务到达的顺序进行调度,先到先得。这种方法简单易实现,但可能导致较长作业阻塞短作业。 短作业优先(SJF):优先执行估计运行时间最短的作业。这种方法可以最小化平均等待时间,但可能导致长作业饥饿。 轮转调度(RR):为每个任务分配一个固定的时间片,任务按照顺序轮流执行。这种方法可以保证公平性...
Your C program will perform the following tasks in order based on the given input file: 1. Ready queues will be executed in the order of their queue number (q 1, q 2, etc.) 2. CPU scheduling algorithms FCFS, SJF, and RR will be applied on each ready queue ...
Steps for Binary Search Algorithm So every time, We will find the pivotindex=(left+ right)/2. We will check whether the pivot element is key or not, if it's the key then terminate as the key is found. Otherwise, shrink the range and update left or right as per choices discussed abo...
c++中的explicit关键字用来修饰类的构造函数,表明该构造函数是显式的,在某些情况下,我们要求类的使用者必须显示调用类的构造函数时就需要使用explicit,反之默认类型转换可能会造成无法预期的问题。 protected控制的是一个函数对一个类的成员(包括成员变量及成员方法)的访问权限。protected成员只有该类的成员函数及其派生类...
1. first-come-first-served (FCFS) 2. shortest-job-first (SJF) 3. round-robin (RR) Each process will have a burst time, which represents the total time that a process is in the system. You will model this part of the system: ...
SHIM_SCTP_SS_FCFS, SHIM_SCTP_SS_PRIO, SHIM_SCTP_SS_RR, SHIM_SCTP_SS_FC, SHIM_SCTP_SS_WFQ, }; static const stress_sctp_sched_t stress_sctp_scheds[] = { { (int)SHIM_SCTP_SS_FC, "fc" }, { (int)SHIM_SCTP_SS_FCFS, "fcfs" }, ...
6. The program will accept one command-line argument: the name of the input file. 7. The string "FCFS" represents non-preemptive first-come-first-served scheduling. The string "Priority" represents non-preemptive priority scheduling, where 1 represents the highest priority. The string "RR" ...