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Linux Memory Management Overview Physical Address managementMany small operating systems, such as ecos,vxworks, are embedded systems where the address used in the program is the actual physical address. The physical address referred to here is the

PV primitive processes the synchronization and mutex between processes through the operation semaphores. Its core is an inseparable and uninterrupted program. The concept of semaphore was proposed by the famous Dutch computer scientist Dijkstra in 19

Virtual memoryVirtual memory is a perfect interaction between hardware exceptions, hardware address translation, main memory, disk files, and kernel software, which provides a large, consistent, and private address space for each process. With a

Virtual memoryVirtual memory is a perfect interaction between hardware exceptions, hardware address translation, main memory, disk files, and kernel software, which provides a large, consistent, and private address space for each process. With a

The key abstraction that a process provides to an application: a separate logical control flow that provides an illusion as if our program exclusively uses the processor . a private address space that provides an illusion as if our program

Basic features of the operating system Concurrency: Multiple programs executed in the same period of time (note differences between concurrency and parallelism, which are multiple events at the same time, which are multiple events within a

Three major functions of undo: 1. provide consistent read. 2. roll back the transaction. 3. Check whether the tablespace belongs to temporary, undo, or permanent when the instance recovers? Selecttablespace_name, contents,

Date: 2018.2.5Li QiangReference: man,info,magedu handouts, Universal InternetLab environment: VMware? Workstation Pro, Centos 6.9,centos 7.4,securecrt Version 8.1.4Statement: The following English is purely personal translation, English Class B,

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Process--excerpt from "Deep Understanding of computer system 2nd," 8th chapter of abnormal control flow The key abstraction that a process provides to an application: a separate logical control flow that provides an illusion as if our program uses