目录 . 简介 . 进程虚拟地址空间 . 内存映射的原理 . 数据结构 . 对区域的操作 . 地址空间 . 内存映射 . 反向映射 .堆的管理 . 缺页异常的处理 . 用户空间缺页异常的校正 . 内核缺页异常 . 在内核和用户空间之间复制数据 1. 简介 用户层进程的虚拟地址空间是Linux的一个重要抽象,它向每个运行进程提供了同样的系统视图,这使得多个进程可以同时运行,而不会干扰到其他进程内存中的内容,此外,它容许使用各种高级的程序设计技术,如内存映射,学习虚拟内存,同样需要考察可用物理内存中…

Page Cache This is used to speed up access to images and data on disk. As pages are read into memory from disk they are cached in the page cache. If they were discarded and then needed again they can quickly be fetched from this cache. 页缓存,为了加速从硬盘当中读…

…

A processor including a virtualization system of the processor with a memory virtualization support system to map a reference to guest-physical memory made by guest software executable on a virtual machine which in turn is executable on a host machin…

Shell script for logging cpu and memory usage of a Linux process http://www.unix.com/shell-programming-and-scripting/223177-shell-script-logging-cpu-memory-usage-linux-process.html…

Process program program==code+data; 一个进程可以对应多个程序,一个程序也可以变成多个进程.程序可以作为一种软件资源长期保存,以文件的形式存放在硬盘 process: 相应的程序+CPU上下文+一组系统资源 动态性, 独立性, 并发性 一个CPU,任何时刻最多只能有一个进程去使用它 process VS thread 进程的资源分配的基本单位,是分配资源的抽象:进程把一组相关资源组合起来,构成了一个资源平台,或者说资源环境,包括运行上下文,内存地址空间,打开的文…

Understanding Virtual Memory by Norm Murray and Neil Horman Introduction Definitions The Life of a Page Tuning the VM Example Scenarios Further Reading About the Author Introduction One of the most important aspects of an operating system is the Virt…

https://hoytech.com/vmtouch/ [root@localhost ~]# git clone git://github.com/hoytech/vmtouch.git 正克隆到 'vmtouch'... remote: Counting objects: , done. remote: Total (delta ), reused (delta ), pack 接收对象中: ), 285.79 KiB | 24.00 KiB/s, 完成. 处理 delta 中: ), 完…

This has been a long-standing complaint with Java, but it's largely meaningless, and usually based on looking at the wrong information. The usual phrasing is something like "Hello World on Java takes 10 megabytes! Why does it need that?" Well, h…

墙外通道:http://thinkiii.blogspot.com/2014/02/arm64-linux-kernel-virtual-address-space.html Now let's talk about the Linux kernel virtual address space on 64-bit ARM CPU. You can find information about ARMv8 in ARM official website. http://www.arm.com/pr…