Improve performance whilemaintaining the functionality of a simpler and more abstract model design of processor hardware

Computer Systems A Programmer ' s perspective Second Edition

In this chapter, we take a brief look at the design of the processor hardware. Westudy the hardware system can execute the instructions of a particular ISA. This view would give you a better understanding of what computers work and thetechnological challenges faced by computer mans Ufacturers. One important con-cept is, the actual-a modern processor operates can be quite differentfrom the model of Computat Ion implied by the ISA. The ISA model would seemto imply sequential instruction execution, where each instruction is fetched andexecuted To completion before the next one begins. By executing different partsof multiple instructions simultaneously, the processor can achieve higher perfor-mance than if It executed just one instruction at a time. Special mechanisms areused to make sure the processor computes the same results as it would with se-quential execution. This is the using clever tricks to improve performance whilemaintaining the functionality of a simpler and MoRe abstract model is well knownin computer science. Examples include the use of caching in Web browsers andinformation retrieval data structures such as balanced binary trees and hash tables.  in computer science, it is well known that there is a clever way to improve performance while maintaining a simpler, more abstract model. This is an example of using caching in a Web browser or in an information retrieval data structure such as a balanced binary tree and a hash table.   

Improve performance whilemaintaining the functionality of a simpler and more abstract model design of processor Hardwar E