计算机高级系统结构课件.pdf

Lecture3: Basic Pipeline ChapterA: Basic pipeline 2013-10-14 ComputerArchitecture_BasicPipeline ComputerArchitecture_BasicPipeline 1.2 Multi-cycle implementation ComputerArchitecture_BasicPipeline 1.3 What is Pippeliningg ? Pipelining: is a set of data processing elements connected in series, so that the outpput of one element is the input of the next one. The elements of a ppippeline are often executed in pparallel or in time-sliced fashion; in that case, some amount of buffer storagge is often inserted between elements. ComputerArchitecture_BasicPipeline 1.4 Instruction Pipeline An instruction pipeline is a technique used iin ththe ddesiign off computters andd othther didigititall electronic devices to increase their iinsttructition ththroughhputt (th(the numbber off instructions that can be executed in a unit of titime)). implementation technique whereby different instructions are overlapped in execution at the same time. implementation technique to make fast CPUs ComputerArchitecture_BasicPipeline 1.5 Why Pipelining: Its Natural Laundry Ann, Brian, Cathy, Dave A B C D each have one load of clothes to wash, dry, and fold Washer takes 30 minutes DDryer t takkes 40 minuts 40 minutess “Folder” takes 20 minutes ComputerArchitecture_BasicPipeline 1.6 Sequential Laundry 6 PM 7 8 9 10 11 Midnight Time 30 40 20 30 40 20 30 40 20 30 40 20 T A