how to get 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

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

For the ubuntu14.04 operating system, you can see the structure of the process control block in the/usr/src/linux-headers-4.4.0-31/include/linux/sched.h file, as followsstructtask_struct {volatile LongState/*-1 unrunnable, 0 runnable, >0 stopped*/

Liunx lookup process PID through the process name can be found by pidof [process name]. Conversely, there is no relevant command for the same search process name through PID. In the Linux root directory, there is a VFS (virtual file system) in/proc,

I do PID algorithm background and experience: I electronic information science and technology, is now a junior student, the direction of control is quite interested, just went to the university when the lab teacher said PID algorithm, that year in

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

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

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

Recent Toss CTSAndroid.security.ctsTestcheckforduplicateoutput, the individual tests are easy to get through, but the joint test is hung