Author: Trisha Gee Translator: Zhang Weibin Key Points Since Java 8, many useful new language features, tools, and performance improvements (especially related to garbage collection optimizations) have been introduced. When choosing to upgrade, we face the decision of whether to upgrade to the latest Java (12) and prepare for upgrades every six months, or to … Read more
1. What is ThreadLocal?ThreadLocal allows each thread to have its own variable copy, which does not interfere with each other.Usage example: public class BasicExample { // Create a ThreadLocal variable private static ThreadLocal<Integer> threadLocal = ThreadLocal.withInitial(() -> 0); public static void main(String[] args) { // Set value in the main thread threadLocal.set(10); System.out.println("Main thread gets … Read more
1. Concept of Virtualization What is Virtualization Virtualization is the process of creating multiple virtual machines from a single physical machine using a hypervisor. The behavior and operation of virtual machines are similar to that of physical machines, but they utilize the computing resources of the physical machine, such as CPU, memory, and storage. The … Read more
Linux | Red Hat Certified | IT Technology | Operations Engineer 👇 Join our technical exchange QQ group with 1000 members, note 【Public Account】 for faster approval 1. What is Virtualization Virtualization is a process that allows for more efficient utilization of physical computer hardware and is the foundation of cloud computing. Virtualization technology uses … Read more
Friendly Reminder: The full text contains over 6200 words, estimated reading time is 16 minutes. Abstract In public cloud environments, users no longer own the hardware resources of the infrastructure; software runs in the cloud, and business data is also stored in the cloud. Therefore, security issues are one of the main concerns for users … Read more
Consider this: A64 refers to the instruction set architecture, AArch64 is the 64-bit architecture, ARMv8/ARMv9 are also architectures, and TrustZone is a type of security architecture. Confused? What about ARM64? 1. ARMv7/ARMv8/ARMv9 are the true architectures of ARM. The term architecture can be understood as a technical specification, a technical reference, or a design; in … Read more
Reposting an article;https://kernel.meizu.com/2023/12/13/Full-stack-resolution-of-the-Linux-time-subsystem/The time management in ARMv8 is primarily based on the same time base + different offsets = specific time.Let’s take a look at the main data structures.Used to calculate the time value under a certain offset; assuming we read the real time starting from 1970.Here, the current base + offset 【【TK_OFFS_REAL】 is equal … Read more
Typically, a line of code like<span><span>a = a + 1</span></span> translates into three assembly instructions: ldr x0, &aadd x0,x0,#1str x0,&a That is, (1) read the variable a from memory into the X0 register, (2) add 1 to the X0 register, (3) write the value of X0 back to memory a. Since there are three instructions, … Read more
Abstract: This article is authorized for publication by Zosi Automotive Research, authored by Zhou Yanwu. Following last week’s analysis of Toyota’s mass-produced LiDAR, this article continues to analyze Toyota’s autonomous driving computing system. Its main system is the ADS ECU, with a backup of ADX, and it also adds a second battery system. In terms … Read more
Currently, we are at the early stages of an exciting transformation in artificial intelligence (AI) technology. With the accelerated evolution of natural language processing, multimodal large models, and generative AI technologies, AI is reshaping various industries at an unprecedented pace. According to IDC’s forecast, the global data volume is expected to grow from 159.2ZB in … Read more