Benchmark 简介
初次认识 benchmark
它是对一个系统的评价。
最早，system designer 自己做benchmark，但是他们做的benchmark通常是 toy program, 这些程序不能真实的反应system 的性能
所以出现 了 benchmark designer 这些人设计 benchmark 通常是成千上万行的程序，这样很难修改
SPEC 好像是设计benchmark 的公司。
Embedded System interview Question
1. What are static variables? Static variable in a function only remain one copy of itself. Static variable in a module can be used by any function in the module Static function can only be called in its class 2. What are volatile variables? Volatile variables may change its value unexpectedly in the program. The program will check its value every time, it tries to use it. If a variable is not volatile, the program may keep a copy of the var in its cache. 3. What do you mean by const keyword ? A constant variable is a read only variable. You cant change its value else where except initialization. 4. What is interrupt latency? Interrupt latency is the time between the generation of interrupt and the time for interrupt handler to process it. 5. How you can optimize it? We may use polling and message passing for interrupt to handle interrupt immediately. 6. What is size of character, integer, integer pointer, character pointer? The size of character is 1 byte, inte
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