Laruence's linux private house dish (Third edition) Basic Learning-non-Book Scan version .. It seems that there is no-Linux general technology-Linux technology and application information in the jar. The following is a detailed description. [I = s] This post was last edited by zhangwlong
Chapter One: Introduction to the Linux kernelI. Unix and LinuxUNIX is a powerful, robust, and stable operating system.1.UnixKernel features
Very concise: Provide only hundreds of system calls and have a clear purpose;
In Unix , most things are treated as files (or are committed);
Unix kernel is the related system tool software is written in C language, which makes the system has a strong portability;
Unix processes are created ve
_ Get _ priority _ Max () returns the maximum and minimum precedence for a given scheduling policy
2. System calls related to processor bindings
Linux Scheduler provides mandatory processor binding mechanism
In a CPUs _ allowed bitmask in a task _ struct
Sched_setaffinity () sets a bitmask of different combinations of one or several bits
Sched _ Getaffinity () returns the current cpus_ allowed bit mask
3. Discard Proces
)
}
Cmd. Process.wait ()
}
By configuring the Cgroups virtual file system, we have limited the memory footprint of the stress process in the container to ' 100m '.
PID USER PR NI virt RES SHR S%cpu%mem time+ COMMAND10861 Root 0 212284 102464 212 R 6.2 5.0 0:01.13 Stress"' summary
In this section, we mainly introduce the Linux cgroups, through the Linux cgroups three kinds of structure, can arbitrarily
Linux View system CPU number, core book, Number of threads
Now that the number of CPU cores and threads is getting higher, this article will show you how to determine how many CPUs a server has, a few cores per CPU, and several threads per core.
To view the number of physical CPUsgrep ' physical id '/proc/cpuinfo | Sort-u
View number of coresgrep ' core ID '/proc/cpuinfo | Sort-u | Wc-l
"Unix/linux Network log analysis and Traffic monitoring" new book listing one months, sales ranked TOP 10, thank you for your support, there will be a heavy new book launch, 2015 Happy New Year!650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/57/C0/wKioL1SkpVfChn_nAAaBy3tWQs4478.jpg "title=" screen shot 2015-01-01 a.m. 8.44.22.png "alt=" Wkiol1skpvfchn_
This book is a high-quality Linux technology self-study book written by a number of Red Hat Architects (RHCA) based on the RHEL7 system, each chapter of knowledge points from a practical and strong coherence, ideal for Linux beginners or as a Linux-related teaching material,
Article Title: New Book recommendation: Linux logical volume Management (LVM ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
This book
Learn the Linux project book My name is Amanda, and I'm determined to learn from the old boy the 27-week end-of-class Linux OPS course, and after 5-6 months of study, I expect the current salary to rise by 12K per month. Here are the learning methods to achieve the goal. 1. No matter the work is busy also in the time to adhere to advance preview and summary, in o
Linux Kernel programming paper book recommendation-general Linux technology-Linux programming and kernel information, the following is a detailed description. These are the books read by experts. The following books are popular. I believe that with his principles, you may wish to consider the following books before buy
- 设置关注变量 - 18.9 detection system 18.9.1 using UID as selection criteria
if (current->uid! = 7777)
{
/ old algorithm /
Else
{
/ New Algorithm /
}
18.9.2 Using condition variables
You can use conditional variables if your code is not process-independent, or if you want to have a mechanism that can be used for all situations to control an attribute.
This is easier than using UID, just to create a global variable as a conditional selector
Article Title: Messenger (iptux): The Flying Pigeon book under Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
I wonder if you have used the "Flying Pigeon
到其中的一个子进程退出,此时函数返回该子进程的PID。
When you release the process descriptor, you need to call Release_task ().
3.5.2 Orphan Process
Overview: The parent process exits before the process, leaving behind the child process, the orphan process
The workaround:
Finds a new parent process within the current thread group for the orphan process, or directly with Init as its parent process
Call Order:
- do_exit()-- - >forget_original_parent()- - >find_new_p
series solved with this method)Log in with super privileges, set environment variablesCommand: sudo gedit/etc/profileEnter at the bottom of the document: (Hint: The path entered after Pythonpath= is the Caffe path installed under Linux)Pythonpath=caffe/python: $PYTHONPATHExport PYTHONPATHCommand: Source/etc/profilePythonImport Caffe6.test:Command: Python draw_net.py e.g. ./python/draw_net.py./examples/mnist/lenet_train_test.prototxt lenet.pngNote: Th
Lea EAX,[EBX+ECX]
Leal (%EBX,%ECX),%eax
Sub eax,[ebx+ecx*4h-20h]
subl-0x20 (%ebx,%ecx,0x4),%eax
As can be seen from the table, the grammar of at-and-T is more obscure, because [Base+index*scale+disp] can see its meaning at a glance, and disp (Base,index,scale) is unlikely to do so.This approach is often used to access a field within a particular element of the data structure array, where base is the starting address of the array, and scale is the s
The book introduction to C language programming in Linux-general Linux technology-Linux programming and kernel information. The following is a detailed description. This book introduces c language programming in Linux, hoping to h
Tags: operations database python Java managementThe history of human reading is almost the history of human civilization. Book is the carrier of human spiritual wealth, human progress and achievements are recorded in the book, Inherit and flourish. "World Study Day" is only one day, but its meaning is to make every day a "reading Day". Let reading become our lifelong pursuit of "fashion." In this special da
entries that do not copy the parent process.The implementation of the Vfork () system call is done by passing a special flag to the clone () system call.3.4 Implementation of threads in Linux3.4.1 Creating ThreadsCreating a thread is similar to creating a normal process, except that you need to pass some parameter flags when invoking clone () to indicate which resources need to be shared:Clone (CLONE_VM | Clone_fs | Clone_files | clone_sighand,0);The parameter flags passed to clone () determine
My name is Zhang Zhiqiang, in the old boy education to learn Linux operation and maintenance to graduate, I must achieve the goal is, after-tax monthly salary of 10K. In order to achieve this goal I take the following measures:First: Get up 6 o'clock in the morning every day. Sleep 11 o'clock in the evening. No less than 5 hours of study time per day. Minimum sleep time 6 hoursSecond: Follow the teacher's thinking in class. Preview, organize, take not
For more information about the Linux-based book capture tool-general Linux technology-Linux technology and application, see the following. Author: fangvv. I am also a Linux fans. I have been using Ubuntu, Debian, RedHat, and other versions for a long time. I hope to learn fr
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