7 Suppose access to an instruction in the cache is20 times faster than access to an instruction inthe main memory. Assume that a requestedinstruction is found in the cache with probability0.84, and also assume that if an instruction isnot found in the cache, it must fırst be fetchedfrom the main memory to the cache and thenfetched from the cache to be executed. Thespeedup factor resulting from the presence ofthe cache is:

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Engineering

Computer Science

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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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Concept explainers

System Management Strategies

The administration of the Information Technology (IT) system in a business network or a data center is known as system management. A good system management plan makes it easier to deliver IT as a service and allows staff to react rapidly to changing business needs and system activity. Every business environment needs a change for the organization to constantly grow. These changes will require constant changes to business strategies for the organization to be successful.

Question

Suppose access to an instruction in the cache is
20 times faster than access to an instruction in
the main memory. Assume that a requested
instruction is found in the cache with probability
0.84, and also assume that if an instruction is
not found in the cache, it must fırst be fetched
from the main memory to the cache and then
fetched from the cache to be executed. The
speedup factor resulting from the presence of
the cache is:

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