Title Returns the relevant time information of the specified process, such as the process creation time, the running time of the process in user mode and kernel mode, the running time of all descendant processes of the process in user mode and the running time in kernel mode, etc. Call prototype 1.copy_to_user() 2.find_get_pid() Parameter meaning:*pid_t […]
Tag: compilation
Duo cv1800b first time builds C compilation and remote gdb environment
Reference link: https://community.milkv.io/t/duo-cv1800b-first-time-c-gdb/56ss?s Author: tinnu Environment setup apt installs necessary components sudo apt install dialog python3-dev make git bc gcc flex bison ninja-build libssl-dev rsync pkg-config device-tree-compiler squashfs-tools parted dosfstools Download a higher version of cmake Releases · Kitware/CMake · GitHub 2 https://github.com/Kitware/CMake/releases/download/v3.19.3/cmake-3.19.3-Linux-x86_64.tar.gz 2 Pull repo Note that github must add a public key; if […]
This error originates from a subprocess Termux matplotlib pandas compilation error and jupyter installation issues
Article directory Notice Problem Description ~~Question complaints~~ Solution 3 steps version record 1 Clear pip cache 2 Successful installation of matplotlib matplotlib completes dependent commands 3 Successful installation of pandas Supplementary question 1: `pip install jupyter` error: solution Supplementary question 3: There is a conflict between openblas and libopenblas, causing libopenblas to fail to be […]
Compilation Principles – SLR (1) Analysis
Name: Use SLR (1) analysis technology to perform sentence analysis on input strings Input: SLR (1) analysis table (saved as text.txt file), analyzed sentence patterns File example: The implementation code is as follows: (The functionality of each function is commented in the code) #include<stdio.h> #include<string.h> typedef struct any_W //save grammar { char unset; char wenFA[8]; […]
QT5.15.2 builds Android compilation environment and uses emulator to debug (full)
1. Install QT5.15.2 Address: Download My computer is Windows, so I choose Windows. Since the official installation process is very, very slow, you must follow the steps to install it, otherwise it will be so slow that you will doubt your life. 1) Open “Command Prompt” (Start -> Windows System -> Command Prompt) or “win […]
Compilation Principles: Special Topic 3_LL(1) Grammar Analysis Design Principles and Implementation
Article directory 1. Experimental purpose 2. Experimental requirements 3. Program implementation 3.1. Introduction to relevant environments 3.2. Main data structures 3.3. Program structure description 3.3.1. Design method 3.3.2. Function definition 4. Program testing 5. Experiment summary 5.1. Technical difficulties and solutions 5.2. Experimental thoughts and experience summary 1. Experiment purpose Through experiments, master LL(1) grammar […]
[MySQL]–SQL precompilation, dynamic sql
The keyboard is broken and the annual salary is 300,000 Table of Contents 1. SQL pre-compilation The execution process of a SQL statement Disadvantages Advantages of precompiled SQL Two parameter placeholders summary 2. Dynamic SQL Concept introduction: Case: Dynamic SQL statement: Summary of application scenarios: 3. Summary: 1. Pre-compilation of SQL The execution process of […]
javascript precompilation
To understand precompilation, you must first know the js running mechanism. The following three steps will occur before the js code is run. Grammar analysis (scan the js file throughout to see if there are any grammatical errors) Pre-compilation (solve execution order issues) Interpret and execute (explain one line and execute one line) function test() […]
[Audio and video | opus] The whole process of opus compilation
Blog homepage:https://blog.csdn.net/wkd_007 Blog content:Embedded development, Linux, C language, C++, data structure, audio Video Content of this article:Introduction to the compilation of open source libraries related to audio coding opus Sharing golden verses:Confucius said: The ancients could not express their words, and they could not catch them when they were ashamed. . –“The Analects of Confucius […]
Xunwei iTOP-4412 Android 4.0/Linux source code compilation
1. Preparation Build and configure the compilation environment of uboot, Linux3.0 and Android4.0. For the complete construction and configuration process, please refer to the following blog post: Construction of Android 4.0 system compilation environment for iTOP-4412 (full version) – CSDN blog https://blog.csdn.net/Eva20192020/article/details/134668004?spm=1001.2014.3001.5502 Tip: It is recommended to delete the original package file after decompression in […]