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摘要： Operator[] The performance of [] in C and C++ is different. e.g., when you excute A[index] If A is a object, it will call the operator[] If A is a poi 阅读全文

摘要： 大纲 指令集与简单CPU处理器设计 复杂CPU流水线与乱序执行（指令级并行） 高速缓存、内存及存储器（存储） 多线程与多核系统（线程级并行） 向量处理器与GPU（数据级并行） 微码与超长指令字处理器 片上网络 仓库级计算机与云计算、分布式 系统评价与性能分析 硬件安全、硬件虚拟化和加速 指令集与简单 阅读全文

摘要： Wildcard The wildcard in makefile is similar with macro in C/C++, it isn't similar with wildcard in linux shell, so it doesn't expend automatically. o 阅读全文

摘要： After we install Xcode Command Line Tools, we will get gcc and g++ in /Library/Developer/CommandLineTools/usr/bin and the same contents in /usr/bin. B 阅读全文

摘要： 关于访问控制，是CPU基于段实现的一种机制。而所谓的高低特权指令和数据，则是指高低特权的指令和数据。 高特权指令可以访问高特权和低特权数据，低特权指令仅可以访问低特权数据 注意以上仅仅是指令访问数据的规则，对于指令调用指令与之不同，无论是高特权还是低特权指令，均不能调用不同权限的指令。换句话说，相同 阅读全文

摘要： Asynchronization (Multithreading) The first thing we need to do is understanding the correlations between multithreading and parallel computing. Multi 阅读全文

摘要： Vectorization（矢量化） Before we understand the vectorization, we can see a common secnario. We have a array that has 100 float numbers, we want to calcul 阅读全文

摘要： The contrast of format between AT&T and Intel.  阅读全文

摘要： Using __cplusplus to check the version of C++ that is used by compiler. Reference [1] Replacing text macros [2] Standard Predefined Macros 阅读全文

摘要： The collocation between const and original pointer is confused to many people. There are two usages of it. The first one is a variable pointer that po 阅读全文