Computer operating system, computer operating system pdfOperating System (OS) is a computer program that manages and controls computer hardware and software resources. It is the most basic System software that runs directly on bar
First, the operating system structure:1, operating system structure: process- can obtain CPU resources, memory- in order to allow more programs to run, external devices, security mechanisms, networks, etc. constitute the operating syst
Operating System: management process understanding, operating system management process understanding
I recently started to read the operating system book (which is not in this direction). I still cannot fully understand it when I
Operating systems are an important part of almost all computer systems. Computer systems can be roughly divided into four parts: hardware, operating systems, applications and users.
The basic purpose of a computer system is to execute user programs and solve user problems more easily.. To achieve this goal, a computer hardware is constructed. Because hardware
Operating system summary, operating system knowledge points SummaryThe operating system is difficult. It's just that we think so when we see or hear others say it's hard. If you calm down and look at the books for two days, you wi
porting, a more important task stack for designing operating system switches, Ucos will have a ostaskstkinit action when creating a task that is designed to build a stack for the task that is currently being created, and the content stored in the stack is as if the task had just been interrupted. The simulation holds the values of some registers, and when the task switches to the current task, the saved co
Operating system kernel (linux), operating system kernel linux
Kernel of the Operating System)
Is a group of programs that focus on managing all activities of the computer and all hardware in the drive
Add a root user for the ubuntu operating system and a root user for the ubuntu Operating System
1: After a virtual machine is installed and the Ubuntu operating system is installed, you can log on to the
Operating system experiment and code (full), operating system experiment code
Operating System is an extremely important professional course for computer-related majors, but many people do not know how to write the code during the
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
How the operating system works ———— a streamlined operating system kernel20135304 Liu XipengOriginal works reproduced please indicate the source"Linux kernel Analysis" MOOC course http://mooc.study.163.com/course/USTC-1000029000Experimental processOpen the shell with the lab virtual machine, load the Linux kernel neede
One, the simplest "operating system"
The simplest "operating system" is the simplest boot sector (boot Sector). Although it does not have any functionality, it can run directly on bare metal without relying on other software. A boot sector is 512 bytes, and the sector is identified with 0xaa55 as the end. Here is the m
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
The Windows 64-bit operating system provides compatibility with 32-bit applications and retains many 32-bit tools in the "C:\Windows\SysWOW64" directory (for example, CMD.exe is 32-bit). When running 32-bit applications on a Windows 64-bit operating system, operating the reg
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
Whether Linux is a real-time system or a timeshare operating systemHttp://www.cnblogs.com/xiawen/p/3317302.html1. Real-time operating system definitionA real-time operating system (RTOS) is when external events or data are generat
This section first introduced the breakthrough boot sector only 512 bytes of the principle, and then introduced the FAT12 file system, finally through the experiment Load loader and give control to loader to achieve break through 512 bytes of bondage.512-byte limit exceeded
The boot sector used in the preceding section is only 512 bytes. However, there are actually a lot of things that the operating
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
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