Preempt_RT配置选项详解从入门到精通的完整配置手册【免费下载链接】Preempt_RTLinux in itself is not real time capable. With the additional PREEMPT_RT patch it gains real-time capabilities. The key point of the PREEMPT_RT patch is to minimize the amount of kernel code that is non-preemptible, while also minimizing the amount of code that must be changed in order to provide this added preemptibility. In particular, critical sections, interrupt handlers, and interrupt-disable code sequences are normally preemptible. The PREEMPT_RT patch leverages the SMP capabilities of the Linux kernel to add this extra preemptibility without requiring a complete kernel rewrite.项目地址: https://gitcode.com/openeuler/Preempt_RT前往项目官网免费下载https://ar.openeuler.org/ar/openEuler / Preempt_RT 项目通过应用 PREEMPT_RT 补丁为 Linux 内核添加了实时能力其核心是最小化不可抢占的内核代码量同时最小化实现这种额外可抢占性所需修改的代码量。本文将详细解析 Preempt_RT 的配置选项帮助新手和普通用户从入门到精通配置过程。High-Level Preemption-Option Selection在配置 Preempt_RT 时首先需要进行高级别的抢占选项选择以下是几种常见的选择PREEMPT_NONE为服务器操作系统选择传统的非抢占内核。PREEMPT_VOLUNTARY启动自愿抢占点但是不能实现内核批发抢占主要适用于桌面操作系统。PREEMPT_DESKTOP启用自愿抢占点以及非关键部分抢占适用于低延迟桌面操作系统。PREEMPT_RT启用完全抢占包括临界区这是实现实时能力的关键选项。Feature-Selection Configuration Options除了高级别的抢占选项还有一些特性选择配置选项需要了解PREEMPT启用非临界区内核抢占。PREEMPT_BKL实现大内核锁临界区抢占。PREEMPT_HARDIRQS允许硬中断在进程上下文中执行从而可被抢断。不过标记为 SA_NODELAY 的中断会继续在硬件中断上下文中进行。PREEMPT_RCU使 RCU 读侧临界区可抢占。PREEMPT_SOFTIRQS让软中断在进程上下文中进行进而可被抢占。调试配置项有些调试配置项可能已经发生了变化但了解 PREEMPT_RT 可以提供的调试种类还是很有必要的。这些调试配置有助于在配置和使用 Preempt_RT 过程中发现和解决问题确保系统的稳定性和实时性能。要使用 Preempt_RT首先需要获取项目代码你可以通过以下命令克隆仓库git clone https://gitcode.com/openeuler/Preempt_RT。克隆完成后进入项目目录根据上述配置选项进行相应的配置以满足你的实时应用需求。通过合理配置这些选项你可以充分发挥 Preempt_RT 为 Linux 内核带来的实时能力。【免费下载链接】Preempt_RTLinux in itself is not real time capable. With the additional PREEMPT_RT patch it gains real-time capabilities. The key point of the PREEMPT_RT patch is to minimize the amount of kernel code that is non-preemptible, while also minimizing the amount of code that must be changed in order to provide this added preemptibility. In particular, critical sections, interrupt handlers, and interrupt-disable code sequences are normally preemptible. The PREEMPT_RT patch leverages the SMP capabilities of the Linux kernel to add this extra preemptibility without requiring a complete kernel rewrite.项目地址: https://gitcode.com/openeuler/Preempt_RT创作声明：本文部分内容由AI辅助生成（AIGC），仅供参考