a) Assume, on average, 60 instructions arrive at the CPU every second, and each instruction takes 4 seconds to be processed in the CPU. Instructions are being stored in a queue-based storage while waiting for processing. What is the average number of instructions in the queue?

a) Assume, on average, 60 instructions arrive at the CPU every second, and each instruction takes 4 seconds to be processed in the CPU. Instructions are being stored in a queue-based storage while waiting for processing. What is the average number of instructions in the queue?

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

Types of database architectures

A Database Architecture represents the Database Management System’s (DBMS) design (schema). The DBMS architecture makes it easy to understand the components involved in the database system and their relations. The DBMS architecture may vary based on the system on which it runs. Some systems contain both client and server machines whereas some run only on a server machine. Based on the architecture, the system can be classified as centralized, decentralized, or hierarchical.

Question

Use the information given to solve part a and b

a) Assume, on average, 60 instructions arrive at the CPU every second, and each instruction
takes 4 seconds to be processed in the CPU. Instructions are being stored in a queue-based
storage while waiting for processing. What is the average number of instructions in the
queue?

b) Now assume that pipelining is applied. So, the average number of instructions queuing is
reduced by half. What is the average time each instruction needs to be processed by the
CPU?

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