计算机系统结构试卷及答案2套.doc

计算机系统结构试卷1
1 、多选题( 6 分)
( ) 是计算机系统结构研究的内容;( )是计算机组成研究的内容;( )是计算机实现研究的内容。
A .指令系统 B .缓冲和排队技术 C .数据通路宽度 D .专用器件的设计
E .中断机构 F. 功能部件的并行度
G. 硬件能直接识别和处理的数据类型和格式等的数据表示
H. 最小可寻址单位、寻址种类、地址计算等的寻址方式
I. 用硬联还是微程序控制等的控制机构的组成方式
J. 器件、模块、插件、底板的划分与连接 K. 寄存器组织
L. 器件技术 M. I / 0 结构 N. 预估、预判技术 O. 整机装配
 
2 、(6 分) 某台机器的虚拟地址和物理地址都是 32 位,页面大小为 4KB ,并给出了部分页地址映射如下:
Virtual Page Number
Physical Page Number
0xabc89
0x97887
0x13385
0x99910
0x22433
0x00001
0x54483
0x 1a 8c 2
计算下表中和虚拟地址对应的物理地址。
Virtual address
Physical address
0x22433007
 
0x13385abc
 
0xabc89011
 
 
3 、(5 分)
Consider a high-performance processor, which has a mean CPI of for all instructions except load instructions. Typically, 25% of all instructions executed by this processor are loads.
The processor accesses data from a direct-mapped cache with the following characteristics:
Cache miss ratio
1 miss per 8 accesses
load CPI if cache hits
1 cycle
load CPI if cache misses
9 cycles
Compute the mean CPI for load instructions, and pute the mean CPI for the system as a whole.
4 、( 5 分) Which improvement gives a greater reduction in execution time: one that is used 20 percent of the time but improves performance by a factor of 2 when used, or one that is used 70 percent of the time but only improves performance by a factor of when used?
5 、( 6 分)考虑一个分页存储结构,逻辑存储空间分为 12