这是本人在应聘软件工程师时的一个测试题，希望能为有此意向的提供一个例程。-This is a software engineer when I recruited a test question, hopefully this is the intention of providing a routine.

M. Tim Jones, 顾问工程师, Emulex Corp. M. Tim Jones 是一名嵌入式软件工程师.这里是他在IBM上发表的一编关于linux下GCC编译器的一些优化知识。比如：内核中常见到的likely() unlikely() __must_check 等等函数和函数属性从何而来，有什么作用，及如何对变量优化，对结构或函数添加属性等等。-M. Tim Jones, Consultant Engineer, Emulex Corp. M. Tim Jones is an

A datasheet, data sheet, or spec sheet is a document that summarizes the performance and other technical characteristics of a product, machine, component (e.g., an electronic component), material, a subsystem (e.g., a power supply) or software in suf