System A has two processors, and Program X takes 10 seconds to run on one of them. Program Y executes in parallel on the other CPU in 10 seconds. System B is powered by a single CPU that can only handle one problem at a time. On this CPU, Program X takes 6 seconds to execute. Which system would you choose if overall system throughput was important to you?

System A has two processors, and Program X takes 10 seconds to run on one of them. Program Y executes in parallel on the other CPU in 10 seconds. System B is powered by a single CPU that can only handle one problem at a time. On this CPU, Program X takes 6 seconds to execute. Which system would you choose if overall system throughput was important to you?

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter4: Processor Technology And Architecture

Section: Chapter Questions

Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...

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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?
System A has two processors, Program X takes 10 seconds to execute on one of the processors. Program Y takes 10 seconds to execute in parallel on the other processor. System B has a single processor that can execute only one problem at a time. Program X takes 6 seconds to execute on this processor. WHich system would you oick if you cared about overall system througjput?
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