• Memory 内存知识-10-Disk Raid
  磁盘基本知识 磁盘大致由盘片、磁头、步进电机等几部分组成组成。 盘面：硬盘一般含有一个或多个盘片，一个盘片包含两个盘面。 磁道：每个盘面被划成多个狭窄的同心圆环，这样的圆环叫做磁道。 扇区：每个磁道的每段圆弧叫做一个扇区，是读写的最小单位。 柱面：所有盘面上的同一磁道，在竖直方向构成一个圆柱，称为柱面。 读写过程：硬盘读取数据时，磁头先移动到读取扇区所在磁道的上方，这个过程耗时叫...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-09-Operation in High level
  Cache Operation at High Level To understand the costs and savings of using a cache we have to combine the knowledge about the machine architecture and RAM technology from section 2 with the struct...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-08-大局观中的 cpu caches
  CPU Caches in the Big Picture Before diving into（一头扎进技术细节） technical details of the implementation of CPU caches some readers might find it useful to first see in some more details how caches fit ...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-07-cpu caches
  CPU Caches RAM 与 memory 之间的速度差异 CPUs are today much more sophisticated（复杂） than they were only 25 years ago. In those days, the frequency of the CPU core was at a level equivalent to that of the...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-06-其他主存使用者
  Other Main Memory Users Beside CPUs there are other system components which can access the main memory. High-performance cards such as network and mass-storage controllers cannot afford to pipe a...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-05-DRAM Access Technical Details
  DRAM Access Technical Details 前景回顾 In the section introducing DRAM we saw that DRAM chips multiplex（多路复用） the addresses in order to save resources int the form of address pins（地址引脚）. We also saw...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-04-RAM Types
  RAM Types There have been many types of RAM over the years and each type varies, sometimes significantly（显著）, from the other. The older types are today really only interesting to the historians. ...
  2019-05-10 03:08:59 | Memory
• Memory 内存知识-03-当今商业硬件
  当今硬件 It is important to understand commodity hardware because specialized hardware is in retreat（消退）. Scaling these days is most often achieved horizontally instead of vertically, meaning today i...
  2019-05-10 03:08:59 | Memory