《计算机组成及汇编语言原理》阅读笔记：p116-p120

《计算机组成及汇编语言原理》学习第 7 天，p116-p120 总结，总计 5 页。

一、技术总结

1.CPU优化

(1)increase overall performance number

例如：16位电脑提升到32位电脑。

(2)multiprocessing

One way to make computers more useful is to allow them to run more than one program at a time.——不是很确定这里指的是不是“多进程”。

Rather than relying on the good citizenship of each user program, the solution is to create a special überprogram called the operating system, whose primary job is to act as a program control program, as in “program to control [other] programs,” and enforcer of the security rules.——这种方式的实现是通过操作系统来进行的。

(3)Instruction Set optimization

(4)pipelining

(5)Superscalar Architecture

二、英语总结(生词：2)

1.vacation condominium

(1)condo: condominium 的缩写

表示公寓的常见单词有 apartment/flast，condo。apartment/flat和 condo的区别是：apartment/flat的住户对房屋没有所有权，condao的住户对房屋有所有权。apartment 和 flat 的区别是 apartment 在美式英语中用得比较多，flat 在英式英语中用得比较多。

p116, As with time-sharing a vacation condominium, time is divided into slices (weeks for the condo, perhaps milli- or microseconds for the CPU), and you are allowed to use the equipment for one slice.

刚开始看这句话很懵，“vacation condominium” 和 CPU 有什么关系呢？查了一下 “as with” 的意思 “in the same way as”——好吧，对这个词没理解对，刚开始理解成了“with”，其实是 “like” 的意思，作者这是在类比。

2.citizenship

(1)citizenship: citizen + -ship

(2)citizen: cite(city) + -ain(-ian)

u.Citizenship is also carrying out the duties and responsibilities of a member of a particular society.

p117, Rather than relying on the good citizenship of each user program, the solution is to create a special überprogram called the operating system, whose primary job is to act as a program control program, as in “program to control [other] programs,” and enforcer of the security rules.