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System Model(系统模型) Resource types(资源类型)R1R2,,Rm CPU cycles, memory space, vo devices (cPU周期,内存空间,∥O设备) Each resource type Ri has Wi instances (每一种资源R有W种实例) Each process utilizes a resource as follows (每一个进程如下的利用资源) request(申请) use(使用) Release(释放) Applied Operating System Concepts 8 Silberschatz, GalVin, and Gagne@1999Silberschatz ,Galvin, and Gagne©1999 8.4 Applied Operating System Concepts System Model(系统模型) • Resource types (资源类型)R1 , R2 , . . ., Rm CPU cycles, memory space, I/O devices (CPU周期,内存空间,I/O设备) • Each resource type Ri has Wi instances. (每一种资源Ri有Wi 种实例) • Each process utilizes a resource as follows (每一个进程如下的利用资源) – request (申请) – use (使用) – Release(释放)
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