current process

Concept:process Number (PID): The system identifies a positive integer for a processParent Process Number (PPID): The process number of the parent processProcess Group number (PGID): A process group is a collection of one or more processes.session :

The original link is: http://blog.sina.com.cn/s/blog_963453200102uya7.html& placed after the startup parameter to set this process as a background processBy default, the process is the foreground process, then the shell is occupied, we can not do

Code Analysis Mypcb.h Mymain.cThe above code mainly completes the initialization of the NO. 0 process, that is, the PID is set to 0, the state is set to 0 (that is, the runnable state), the process entrance and the current process of the

Original:http://baidutech.blog.51cto.com/4114344/904419Core, also known as the core dump file, is a mechanism of the unix/linux operating system, for online services, the core of the color change, because the core process means that the service

1. Memory distributionAttach one more, descriptor table. Let 's talk about the contents of the Global descriptor:Each item is 8 bytes.The first item is full 0 and is not used.The second item is the bucket descriptor, dt=1,dpl=00, the code snippet

Transferred from: http://www.cnblogs.com/lmule/archive/2010/08/18/1802774.htmlIn short, a program has at least one process, and a process has at least one thread.The thread's dividing scale is smaller than the process, which makes the multi-thread

-------------------Interrupt Registration---------------Interrupt registration is essentially a specified interrupt line to determine an interrupt handler, registration needs to specify that there is, in the break, interrupt processing function,

Morning log in the server compiled to run the service-side program, learned that after the command after the character "&", quit the shell, run the command can continue to run. Puzzled the reason, and to search the following online, understand the

Here we mainly describe the status of the process, the status of the process can be viewed through/proc/pid/status, or can be viewed through the/proc/pid/stat. If you talk about tools, you can see the process information. Here we go through the/proc/

The recent learning driver has always found that the process context and interrupt context are mentioned in some materials or books, but none of them explain what the context is, so I read the information to supplement the so-called Linux context

This paper introduces the concept of process under Linux, and emphatically explains the 4 important system calls Getpid,fork,exit and _exit related to Linux process management, and assists some routines to explain their characteristics and usage

Experimental principle:I. Timing of dispatchDifferent types of processes have different scheduling requirements the first category:       i/o-bound             frequent i/o            usually spends a lot of time waiting for I/O operations to

The transition of the experiment eight process and the general execution process of the system20135114 Wang Zhaoxian Original works reprint please indicate the source "Linux kernel Analysis" MOOC course http://mooc.study.163.com/course/USTC-100002900

1. What is shared memory?Shared memory allows two unrelated processes to access the same logical memory. Shared memory is a very efficient way to share and pass data between two running processes. Memory that is shared between different processes is

& placed after the startup parameter to set this process as a background processBy default, the process is the foreground process, then the shell is occupied, we can not do other operations, for those who do not interact with the process, many times,

v/:* {behavior:url (#default #vml);} o/:* {behavior:url (#default #vml);} w/:* {Behavior:url (#default #vml);. Shape { Behavior:url (#default #vml); Normal 0 7.8 lb 0 2 false false en-US zh-cn x-none/* Style definitions/table. msonormaltable

When you learn UNP, you learn to quit the shell after adding the character "&" after the command, and the commands you run can continue to run. Puzzled reason, and to the Internet search the following, understand. The following are the fragments of

#define declare_waitqueue (name, tsk) / wait_queue_t name =__waitqueue_initializer (name , tsk) #define __waitqueue_initializer (Name,tsk) {task: tsk, task_list: { Null,null}, __waitqueue_debug_ini (name)} Reference:

Learning Python has been intermittent, and today we're going to introduce a very powerful module of python---OS, when we came to the case not using standard Python, but using the Python sibling Ipython,ipython is a python Interactive shell, which is

There are two kinds of environment variables in Linux: Global variables and local variables;Global variables are shared by all processes, regardless of how many shell sub-processes are created (or how many command-line window windows are open),