Instruction Pipelining Exercise on Instruction Pipelining1. Consider a pipeline having 4 phases with duration 60, 50, 90 and 80ns. Given latch delay is 10 ns. Calculate:a. Pipeline cycle timeb. Non-pipeline execution timec. Speed up ratiod. Pipeline time for 1000 taskse. Sequential time for 1000 tasksf. Throughput

Therefore,Pipeline Cycle Time (Tc): 100 nsNon-Pipeline Execution Time (Te): 280 nsSpeedup Ratio:…

Answered: Exercise on Instruction Pipelining 1.…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Consider a Instruction pipeline having 4 phases with duration 20, 40, 50 and 70 ns. Given latch delay is 5 ns. Calculate the following parameters: (i) Pipeline cycle time (ii) Non-pipeline execution time (iii) Speed up ratio (iv) Pipeline time for 1000 tasks (v) Sequential time for 1000 tasks (vi) Throughput Also, draw the block diagram showing the pipelined
Assuming the clock periods for two pipelined machines are as follows: Machine 1 without forwarding: 300ps Machine 2 with forwarding: 400ps What is the total execution time of this instruction sequence on Machine 1 and Machine 2?
Given the following latencies for a 5-stage pipeline: IF ID EX MEM WB 200 ps 300 ps 100 ps 250 ps 150 ps a. What is the clock cycle time in a non-pipelined processor? b. What is the clock rate in a non-pipelined processor? c. What is the clock cycle time in a pipelined processor? d. What is the clock rate in a pipelined processor? e. How long will it take a Load instruction in this pipeline?
For our simple 4-stage RISC pipeline, we run a particular benchmark program and find that it has 19% conditional branches. An additional 4% are unconditional branches. What is the maximum number of the conditional branches that could be taken if we want to keep the CPI to 1.10 or less? what is the minimum percentage of branch delay slots that need to be filled with useful instructions in order to keep the CPI to 1.0135? Assume that f2n= 0.25 ×f1n. In other words, whatever percentage of instructions need justa single NOP, there is another 25% of that requiring two NOPs.
Describe pipelining in terms of boosting the performance of the processor, and then compute the number of cycles that will be required to execute five instructions assuming that each portion of the machine requires one cycle. a. Without using pipelines; b. By using pipelines a. With pipelined processes b. With pipelined processes c. With pipelined processes d. With pipelined processes d.
Discuss the trade-offs between the depth of a pipeline and its performance, considering both latency and throughput.
In a multi-stage pipeline, how does instruction dependency affect pipeline efficiency, and what techniques can be employed to handle dependencies?
Discuss the impact of increasing the number of stages in a pipeline on the clock cycle and overall performance.
If the execution time of pipeline instruction execution is not balanced, what inefficiency must be introduced to allow the piplelined execution to occur? Describe this inefficiency.
True/False Run times of the typical five stages to execute an instruction are as given in some units of time: Instruction Fetch: 10 Instruction Decode: 15 Execute: 30 Memory: 50 Write Back: 20 If this is implemented as a pipelined versus a non-pipelined machine, then depending on the absence of hazards, one could expect the speedup to be about 2.5.
In a 5-stage pipeline, where 2 stages are 150 ps each and 3 stages are 200 ps each, the latency of instruction execution in pipelined execution with no data or control hazards is Note that ps is 10-12 seconds 750ps 900 ps 1000 ps 600 ps Say an operation takes total 10 units of time and I decide to pipeline the operation by subdividing it into 10 stages. Theideal throughput of the pipelined operation would now be a. 1 completed operation every 10 units of time b. 1 completed operation every 1 units of time c. 1 completed operation every 5 units of time d. None of the above answers are correct
We begin with a computer implemented in single-cycle implementation. When thestages are split by functionality, the stages do not require exactly the same amount of time. The originalmachine had a clock cycle time of 7 ns. After the stages were split, the measured times were IF, 1 ns; ID,1.5 ns; EX, 1 ns; MEM, 2 ns; and WB, 1.5 ns. The pipeline register delay is 0.1 ns. b) [15]<C.2> If there is a stall every four instructions, what is the CPI of the new machine?c) [10]<C.2> What is the speedup of the pipelined machine over the single-cycle machine?d) [10]<C.2> If the pipelined machine had an infinite number of stages, what would its speedup be overthe single-cycle machine?

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