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Solve_fork1 () {while (lock==1) {} cnt++; printf ("%d has entered the critical section \ n", Getpid ()); lock = 1; } void Solve_fork2 () {while (lock = = 0) {} cnt++; printf ("%d has entered the critical section \ n", Getpid ()); lock = 0; } The above is achieved mutex access is not wrong, but also problematic, first of all, he was busy to solve the problem, and secondly, he can solve two of the process of competition. Peterson SolutionThe result of the solution

Literacy Tails Operating System (I), literacy tails Operating System What is Tails 1.1? Tails is short for "The Amnesic Incognito Live System. As a Linux release, Tails is derived from Debian (Debian is one of the most influential community releases ). Tails is designed to h

Running a virtual machine on Windows is a Linux operating system, how can you pass files between different operating systems?This is my personal firsthand, assuming you do not have a good method. It was very painful indeed. Here is a summary of my personal approach: method One. Very useful:* * * * Using a winscp software, it is an open-source g

Operating System-webpage storage management and operating system storage When talking about page-based storage management, I would like to talk about the user's program first, because page-based storage management serves the user's program or processes. After a program is compiled, it will definitely occupy space, that

Review of Operating System Content and Operating System Content Thread: The thread is the execution unit in the process and the minimum unit for CPU allocation. Components: thread stack and Kernel Object The thread stack is the resource required to store threads. The kernel object is a private block in the

First, the experimental contentRewrite Bootsect.s and SETUP.S to complete the following main functions:1, BOOTSECT.S can print a message on the screen "XXX is booting ...", where xxx is the name you give your own operating system, such as Lzjos, Sunix, etc.2, Bootsect.s can complete setup.s loading, and jump to setup.s start address execution.3, SETUP.S is able to output a line of information like a screen

completion time of each job, the turnaround time and the turnaround time (turnover factor).2. Dynamic demonstration of each scheduling, update the current system time, in the running state and waiting for the corresponding information of each job (job name, arrival time, the desired run time, etc.) for the HRRN algorithm, can show each job response than R in each schedule.3. (*) allows users to submit new jobs during the impersonation process.4. (* *

Operating system notes (11) virtual memory, operating system virtual memory Virtual Memory Demand paging Page Replacement Algorithm FIFO first-in-first-out Optimal Replacement: the least used pages in the future. It is difficult to implement. LRU: least recently used. The above approxima

Linux operating system basics, linux operating system Basic Principles of Linux: 1. It is composed of a single small program with a single purpose; it is combined to complete complex tasks; 2. Everything is a file; 3. Avoid capturing user interfaces as much as possible; (Avoid interacting with users as much as possible

wait I/O. Solving method L Exchange Technology: a part of the temporarily unable to run the process (blocking the process) to the external memory (only the program and data, the PCB does not change out), to make room for space, can invoke a new process to execute. • Virtual Storage technology: Each process can only load part of the program and data 4. Suspend: The process is exchanged to the external memory, the state becomes suspended state 4.1 Cause of Process suspend (P91) L Process all blo

1. Access websites and news groups related to Linux, and even directly talk with investors of open-source software to fully understand the operating status of Linux, so as to ultimately destroy Linux. 2. employ a large number of Linux developers, including the former IBM Linux technical leader, to test and research about 20 open source software types and find out their vulnerabilities. (This is the truth that M