In-Depth Analysis of Linux NVMe Driver: From Principles to Practice 1 NVMe Protocol Basics: Why a New Generation Storage Protocol is Needed In traditional storage technology, the AHCI protocol for SAS and SATA interfaces has long been the mainstream standard for hard disk communication. However, with the rapid development of flash memory technology, these interface … Read more
Pistache is a high-performance HTTP and REST framework written in modern C++, fully compliant with the C++17 standard, providing a clear and user-friendly API for building efficient web services and RESTful APIs. Below, I will introduce the core features of Pistache, installation methods, basic usage, and some advanced functionalities. 🚀 Pistache: A High-Performance HTTP and … Read more
Classification of PLCs PLC (Programmable Logic Controller) can be classified in various ways, primarily based on its hardware structure, I/O point count, and functional range. This is similar to classifying cars by structure (sedan, SUV), size (compact, mid-size), or performance (family, performance). The following are the most common and important classification methods for PLCs: 1. … Read more
libaio is an important library in the Linux system for implementing asynchronous non-blocking I/O operations. It allows applications to continue processing other tasks while waiting for I/O operations to complete, significantly improving performance. The table below summarizes the core information about libaio: Feature Description Full Name Linux-native Asynchronous I/O Access Library Core Functionality Provides Linux … Read more
Internal RAM In addition to logic elements, all modern FPGAs have dedicated static RAM blocks, which are distributed among the logic elements and controlled by them. Operation of Internal RAM There are many parameters that affect the operation of RAM, the main parameter being the number of agents that can access the RAM simultaneously. “Single-port” … Read more
In C++, input and output (I/O) are core operations for interacting with users. This article will delve into two commonly used methods: the object-oriented <span>cin/cout</span> streams and the C-style <span>printf/scanf</span> functions, helping you handle program interactions flexibly. 1. C++ Stream I/O:<span>cin</span> and <span>cout</span> 1. Standard Output Stream <span>cout</span> #include <iostream> using namespace std; int main() … Read more
Continuing from the previous article “Ten Discussions on High-Performance Network Programming in Linux | C++11 Implementation of 22 High-Concurrency Models”, many are interested in various Server implementations in C++. Therefore, I have compiled a list of high-performance open-source network frameworks I have encountered over the years, based on 9 <span>C++</span> network frameworks to implement an … Read more
In embedded Linux, Asynchronous I/O (AIO) is a powerful I/O model that allows processes to continue executing other tasks while waiting for I/O operations to complete. Compared to I/O multiplexing mechanisms (such as select and poll), asynchronous I/O uses a signal notification mechanism, allowing processes to avoid repeatedly polling the I/O status. Instead, the kernel … Read more
1. Common Terminology in FPGA ECC (Error Correction Code):Error Correction Code FIFO (First In First Out):First In First Out IOB:Input Output Buffer LUT (Look-up Table):Look-up Table DSP (Digital Signal Processor):Digital Signal Processing, the DSP unit circuit includes basic logic units such as input, output, computation, and carry. PLB (Programmable Logic Block):Programmable Logic Block CLB (Configurable … Read more
Linux has stormed the embedded systems market. According to industrial analysts, approximately one-third to one-half of new 32-bit and 64-bit embedded system designs utilize Linux. Embedded Linux has demonstrated advantages in many application areas, such as SOHO home networks and imaging/multifunction peripherals, and has significant potential for leapfrog development in areas like (NAS/SAN) storage, home … Read more