system idle process

Tags: options Admin user name proc PID ASE String call GRE01. Monitoring System Resource Command = Vmstat [refresh delay Refresh]Example: Vmstat 2 3: Refresh 2 seconds, refresh 3 times02, boot-time kernel detection information = DMESG | grep CPU03. View Memory Usage status = Free-m04. View CPU Information = Cat/proc/cpuinfo05. Display system start time and average load (top first row) = Uptime06. View

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

computing platform equivalent to the computer hardware. It abstracts out a lot of hardware details, and the program can process data in a uniform way, while programmers can avoid many of the hardware details. From another perspective, the average user sees the operating system as a resource manager, with the help of which users can organize their data in a way that is easy to understand, complete their wor

Original: http://blog.csdn.net/luoweifu/article/details/46595285 What is a threadWhat is a thread? What does a thread have to do with a process? This is a very abstract issue, but also a very broad topic, involving a lot of knowledge. I can't make sure that I can talk about it or make sure everything is right. Even so, I would like to speak to him as much as possible, to understand a little, because this is a long time to haunt me, a bewildering field

Meaning of system callIn order to interact with processes on the user space, the kernel provides a set of interfaces.The application accesses hardware and other operating system resources through this set of interfaces.Complete control of hardware and resource access. Safe, reliable, multi-tasking, virtual mustAbstraction of the hardware device (providing the independence of the device).exception, sink,

Problem description: DOS: view the services opened by the system's network connection Solution: (1) DOS Viewing System network connection opening port Note: Run the netstat command to view the opened ports. (2) view and close the process opened by the System Note: Taskkill/pid/F port can be used to close the port of the specified PID Note: Tasklis

Data room charging system-use of stored procedures and charging system storage process In the "checkout" section of the data center billing system, You must select an operator and click the "checkout" button to change the registration, recharge, and return business status of the operator to "settled ". Registration, re

1. What is a processProcess is a computer program on a data set on a running activity, the system is the basic unit of resource allocation and scheduling, is the basis of the operating system structure. It is not just the code of the program, it also includes the current activity, which is shown by the value of the program counter and the contents of the processing register.• The concept of the

retained. Therefore, the memory required is very small. Because the thread requires less overhead than the process Scheduling Only the basic unit of Resource Allocation Basic Unit of independent scheduling and dispatching Concurrency Only inter-process concurrency (traditional OS) Inter-process and inter-thread concurrency

Original source: LuoweifuWhat is a threadWhat is a thread? What does a thread have to do with a process? This is a very abstract issue, but also a very broad topic, involving a lot of knowledge. I can't make sure that I can talk about it or make sure everything is right. Even so, I would like to speak to him as much as possible, to understand a little, because this is a long time to haunt me, a bewildering field of knowledge, I hope that through my un

the CPU idle time, improve the efficiency of the CPU. This hyper-Threading technology is determined by the processor hardware and requires the support of the operating system to be displayed on the computer. Programs typically do not use kernel threads directly, but rather use the advanced interfaces of the kernel thread--lightweight processes (Light Weight PROCESS