current pid

ObjectiveThe last few nights in the process related to the kernel principle, just see the PID this block, it does not seem very complicated, but the introduction of the PID namespace added some data structure, it does not seem so clear, referring to

Unfortunately, the second chapter cannot be published on the homepage. Hit the ground. Send the final article-code. For code design ideas, see the first two articles. // Pid. h # ifndef _ PID __# define _ PID _/* PID = Uk + KP * [E (k)-E (k-1)] + KI

In order to get the corresponding host structure (process descriptor) pointer from the given PID value quickly, the kernel adopts the structure of the PID hash list. First, the following questions to understand: 1) Why the PID hash list only defines

Before looking at the Linux PCI device initialization, see a bit dizzy, and then hand-over the notes written before, at the same time rest!! ~(@^_^@)~ This piece of article is written before, which refer to some of the blog of the Daniel!!the

A piece of wrong code First, let's look at an error code: #! /Bin/bashslice = 100; slppid = 1; pidfile =/var/run/vpnrulematch. pid # Stop the previous sleepkill_prev () {pid = $1;/bin/kill-0 $ PID; exist = $? Ppid = $ (/bin/CAT/proc/$ PID/status

To say clear Systemd, you have to start with the Linux operating system started speaking. The startup of the Linux operating system starts with the BIOS, then the boot Loader loads into the kernel and initializes the kernel. The final step in kernel

Just before soon had a PID, part of the procedure is as follows, for reference only /*============================================================================== In the use of single-chip microcomputer as the control of the CPU, please simplify,

realization of PID temperature control Introduction to PIDPID (proportional Integral derivative) control is a control strategy which is mature and widely used in control engineering, and after long-term engineering practice, a complete set of

This article describes how to get the PID of the current PowerShell process in PowerShell and then use it to do something interesting. Have you ever tried to enter "$pid" in the PowerShell command line window? Try. Copy Code code as follows:

foreword: PID is the abbreviation of proportion, integral and differential, the difficulty of PID control is not programming, but the parameter setting of controller. The key of parameter setting is to understand the physical meaning of each