A monolithic kernel is a kernel where all services (file system, VFS, device drivers, etc) as well as core functionality (scheduling, memory allocation, etc.) are a tight knit group sharing the same space. This directly opposes a microkernel.A microk…

Source: http://ho.ax/posts/2012/02/debugging-the-mac-os-x-kernel-with-vmware-and-gdb/ Source: http://ho.ax/posts/2012/02/vmware-hardware-debugging/ Edit 13 July 2013: I've made a couple of updates to this post to clarify a couple of things and resolv…

User Credentials In order to understand security in OS X, it is important to understand that there are two security models at work. One of these is the kernel security model, which is based on users, groups, and very basic per-user and per-group righ…

P30, preemptive  kernel .kernel threading 和Multithreaded application support没太好理解,我想如果设计个多线程的程序来运行运行,恐怕就好理解了.搞清楚了! 在source code里面, arch和include是和硬件相关的代码,arch下面是architecture-specific的文件, include下面放的是内核的所有头文件,其中带有asm前缀的子目录里面是particular architecture的头文件…

转载自:http://placement.freshersworld.com/power-preparation/technical-interview-preparation/os-interview-questions-23351 1. What is an operating system? An operating system is a program that acts as an intermediary between the user and the computer hard…

1. Multiprogramming system provide an environment in which the various resources (like CPU,memory,and peripheral devices) are utilized effectively,but they do not provide for user interaction with the computer system. 2. Time sharing(or multitasking)…

Source:http://shantonu.blogspot.jp/2014/10/building-xnu-for-os-x-1010-yosemite.html The OS X kernel source (xnu) has been released for OS X 10.10 Yosemite: here Building xnu requires Xcode and some additional open-source (but not pre-installed) depen…

ipcs.ipcrm.sysresv.kernel.shmmax 1.1  BLOG文档结构图 1.2  前言部分 1.2.1  导读和注意事项 各位技术爱好者,看完本文后,你可以掌握如下的技能,也可以学到一些其它你所不知道的知识,~O(∩_∩)O~: ① ipcs的使用 ② ipcrm释放oracle内存段 ③ sysresv的使用 ④ 内核参数kernel.shmmax ⑤ 如何快速的清理Oracle的进程 ⑥ 其它维护操作   Tips: ① 本文在itpub(http://blog.it…

转自 https://blog.csdn.net/ooonebook/article/details/53495021 一.bootm说明 bootm这个命令用于启动一个操作系统映像.它会从映像文件的头部取得一些信息,这些信息包括:映像文件的基于的cpu架构.其操作系统类型.映像的类型.压缩方式.映像文件在内存中的加载地址.映像文件运行的入口地址.映像文件名等. 紧接着bootm将映像加载到指定的地址,如果需要的话,还会解压映像并传递必要有参数给内核,最后跳到入口地址进入内核. 这里的描述参考(…

VNF网络性能提升解决方案及实践 2016年7月 作者:    王智民 贡献者:     创建时间:    2016-7-20 稳定程度:    初稿 修改历史 版本 日期 修订人 说明 1.0 2016-7-20 王智民 初稿                 目录 1    引言    1 1.1    编写目的    1 1.2    背景    1 2    SDN    1 2.1    SDN核心思想    1 2.2    网络虚拟化    4 3    NFV    7 3.1  …