jcb

操作系统之实验二作业调度模拟程序

五迷三道 提交于 2020-03-31 02:01:05
实验二 作业调度模拟程序 专业:商业软件工程 班级:商软2班 姓名:甘佳萍 学号:201406114207 一、目的 实验目的: (1)加深对作业调度算法的理解; (2)进行程序设计的训练。 二、要求 实验要求: 用高级语言编写一个或多个作业调度的模拟程序。 单道批处理系统的作业调度程序。作业一投入运行,它就占有计算机的一切资源直到作业完成为止,因此调度作业时不必考虑它所需要的资源是否得到满足,它所运行的时间等因素。 作业调度算法: (1) 采用先来先服务(FCFS)调度算法,即按作业到达的先后次序进行调度。总是首先调度在系统中等待时间最长的作业。 (2) 短作业优先 (SJF) 调度算法,优先调度要求运行时间最短的作业。 (3) 响应比高者优先(HRRN)调度算法,为每个作业设置一个优先权(响应比),调度之前先计算各作业的优先权,优先数高者优先调度。RP (响应比)= 作业周转时间 / 作业运行时间=1+作业等待时间/作业运行时间 每个作业由一个作业控制块JCB表示,JCB可以包含以下信息:作业名、提交(到达)时间、所需的运行时间、所需的资源、作业状态、链指针等等。 作业的状态可以是等待W(Wait)、运行R(Run)和完成F(Finish)三种之一。每个作业的最初状态都是等待W。 一、 模拟数据的生成 1. 允许用户指定作业的个数(2-24),默认值为5。 2.

JCB Electronic Service tool Heavy Duty Truck Diagnostic Scanner with JCB Service Master 4 V17.0

安稳与你 提交于 2020-01-14 19:49:20
1. Software Version: V1.7.0(At the same time, we also have the old V8.1.0 and V1.45.3 software, we can also provide if you need) 2. Language:English, French, German, Italian, Portuguese, Spanish 3. Update By Email Description: You can reset EMS hours, edit speed limiters and use other functions what require special unlock. JCB Service Master is a gateway application allowing a large number of Vehicle Support Applications to be linked using one familiar interface. The interface acts as a graphical tool for selecting the target vehicle from a groups of Vehicle Families and triggering the

JCB Electronic Service Tool Diagnostic Interface

匿名 (未验证) 提交于 2019-12-02 23:49:02
JCB Electronic Service Tool Diagnostic Interface is used for fast and effective fault finding, check maintenance standards, see if the machine has been abused, view and change machine set up data, flash ECUs with the correct data files. You can reset EMS hours, edit speed limiters and use other functions what require special unlock. Software Version: V8.1.0 JCB Electronic Service Tool Diagnostic Interface Description: JCB Electronic Service Tool Diagnostic Interface is used for fast and effective fault finding, check maintenance standards, see if the machine has been abused, view and change