Preface: The Linux framebuffer and a GPU’s memory serve different purposes in the context of graphics processing. The Linux framebuffer is a simple, low-level graphics interface that allows applications to draw graphics directly to the screen. Background: The DRM/KMS framework is dedicated to the management of the display, graphic and composition subsystems. With the help…

Preface: Kernel extensions – VMWare as well as Qemu also enable you to install a device driver in your host operating system that enables them to speed up execution of kernel code and device accesses by directly executing in kernel mode. Background: VMware Fusion is a software hypervisor developed by VMware for macOS systems. It…

Preface: Compared to pageable memory, pinned memory has only 1 memory transfer. Hence memory transfer time is less for pinned memory than pageable memory. In mapped memory, the address is mapped to the device address space. Hence there is no explicit memory transfer. Background: InfiniBand is a network architecture that is designed for the large-scale…

Preface: In the modern digital world. Digital signatures replace traditional handwritten signatures for identity verification. In the past, pattern matching methods were used to confirm signature integrity through human observation. The integrity of digital signatures is ensured through the Elliptic Curve Digital Signature Algorithm (ECDSA). Background: Elliptic Curve Digital Signature Algorithm (ECDSA) is a cryptographic…

This announcement original published on 20th Feb 2024 Preface: When two components have problems in the same place. If vendor did not specify the details in clear. In this circumstances, the design weakness looks the same. Background: The Enhanced Authentication Plugin (EAP) is an extra software package that doesn’t come pre-installed. Administrators need to install…

Preface: Do you think this design flaw is risky? Yes, I think so. Background: The UIO is a general purpose kernel driver that can be accessed from user space. The purpose of the driver is to act as a thin layer between user space programs and the hardware. Since Linux uses a virtual address system,…

Preface: At the most fundamental level, product lifecycle management (PLM) is the strategic process of managing the complete journey of a product from initial ideation, development, service, and disposal. Background: Agile product lifecycle management (PLM) applies agile principles and methodologies to product management. It is often utilized in software development and its ongoing refinements, improvements,…

Preface: Because when using TLS to transmit static content, the data needs to be read into user space and encrypted before the encrypted data can be transmitted. Facebook found that in the process of using TLS, it will spend 2% of the CPU processing copy from/to user space, and 10% of the CPU will be…