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RSS订阅原创 CPT104操作系统笔记（L6 Resource Management Deadlocks）
System Model System consists of resources Resource types R1 , R2 , . . ., Rm e.g. CPU cycles, memory space, I/O devices Each resource type Ri has Wi instances. Each process utilizes a resource as follows:request / use / release Deadlo...
2022-04-06 19:42:06
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原创 CPT104操作系统笔记(L5 scheduling II)
Thread Scheduling Contention Scope The scope in which threads compete for the use of physical CPUs 2 possible contention scopes: • Process Contention Scope PCS, a.k.a local contention scope. • System Contention Scope SCS, a.k.a global contention sco
2022-04-06 12:11:59
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原创 CPT104操作系统笔记（scheduling I）
Basic Concepts CPU –I/O Burst Cycle • Process execution consists of a cycle of CPU execution and I/O wait. • Process execution begins with a CPU burst, followed by an I/O burst, then another CPU burst ... etc • The duration of these CPU bursts h.
2022-04-05 16:22:56
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原创 CPT104操作系统笔记（Lecture 3 Process Synchronization）
Background What is Process Synchronization (PS)? PS is the task of coordinating the execution of processes in a way that no two processes can have access to the same shared data and resources. Process Synchronization Concurrent access（并发存取） to sha
2022-04-04 20:01:09
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原创 CPT104操作系统笔记（Lecture2 Threads）
Overview What is a thread? OS view: an independent stream of instructions that can be scheduled to run by the OS Software developer view: a "procedure" that runs independently from the main program. • Sequential program: a single stream of instructions
2022-04-03 18:59:32
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原创 CPT104操作系统笔记(Lecture1)
1.Overview 1.1 What is Operating System? An operating system is a program that manages a computer’s hardware. It also provides a basis for application programs and acts as an intermediary between the computer user and the computer hardware. OS car
2022-04-02 16:37:44
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