Pipelining is used because it improves instruction throughput, increasing the level of pipelining cuts the amount of work performed at each pipeline stage, allowing more instructions to exist on the processor at the same time and individual instructions to complete at a more rapid rate. However, throughput will not improve as pipelining is increased indefinitely. Give two reasons for this.

Pipelining is used because it improves instruction throughput, increasing the level of pipelining cuts the amount of work performed at each pipeline stage, allowing more instructions to exist on the processor at the same time and individual instructions to complete at a more rapid rate. However, throughput will not improve as pipelining is increased indefinitely. Give two reasons for this.

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter4: Processor Technology And Architecture

Section: Chapter Questions

Problem 10RQ: How does pipelining improve CPU efficiency? What’s the potential effect on pipelining’s efficiency...

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If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the fetch cycle is 40% of the processor cycle time, what memory access speed is required to implement load operations with zero wait states and load operations with two wait states?
Processor R is a 64-bit RISC processor with a 2 GHz clock rate. The average instruction requires one cycle to complete, assuming zero wait state memory accesses. Processor C is a CISC processor with a 1.8 GHz clock rate. The average simple instruction requires one cycle to complete, assuming zero wait state memory accesses. The average complex instruction requires two cycles to complete, assuming zero wait state memory accesses. Processor R can’t directly implement the complex processing instructions of Processor C. Executing an equivalent set of simple instructions requires an average of three cycles to complete, assuming zero wait state memory accesses. Program S contains nothing but simple instructions. Program C executes 70% simple instructions and 30% complex instructions. Which processor will execute program S more quickly? Which processor will execute program C more quickly? At what percentage of complex instructions will the performance of the two processors be equal?
Why are there limitations to increasing pipeline depth, even though it might seem to increase instruction throughput?
Increasing the degree of pipelining reduces the amount of work done at each pipeline step, enabling more instructions to reside on the processor at the same time and individual instructions to finish faster. However, increasing pipelining does not enhance throughput. Justify this using two reasons.
Compilers and assemblers may be configured to sequence assembly language instructions in such a manner that a pipeline encounters the least amount of risk possible. One of the purposes of pipeline design is to achieve this. Do all assemblers and compilers rearrange assembly language instructions in the same manner in order to achieve the best potential degree of productivity?
Compilers and assemblers may be programmed to sequence instructions in assembly language in such a way that a pipeline faces the least amount of risk feasible. This is one of the goals of pipeline design. To reach the highest possible level of productivity, do all assemblers and compilers rearrange instructions written in assembly language in the same way?
Explore the concept of pipelining in CPU architecture. How does instruction pipelining improve instruction throughput, and what are the potential hazards that can occur in a pipeline design?
It is possible to design compilers and assemblers to order assembly language instructions such that a pipeline is exposed to the least amount of risk possible. One of the objectives of pipeline design is this. Do all assemblers and compilers rearrange instructions provided in assembly language in the same manner to achieve the best degree of productivity?
Compilers and assemblers may be designed to organize assembly language instructions in such a way that a pipeline is exposed to the least amount of risk feasible. This is one of the goals of pipeline design. Do all assemblers and compilers rearrange assembly language instructions in the same way in order to maximize productivity?
It is possible to program compilers and assemblers to order assembly language instructions so that a pipeline is exposed to the least amount of risk possible. One of the objectives of pipeline design is this. Do all assemblers and compilers rearrange instructions written in assembly language in the same manner to achieve the highest level of productivity?
Explain the concept of instruction reordering and its significance in a pipelined processor. Provide examples of how this optimization can improve performance.
Describe dynamic instruction scheduling in pipelining. How does it contribute to better instruction throughput and performance?