Computer Systems: A Programmer's Perspective Plus Mastering Engineering With Pearson Etext -- Access Card Package (3rd Edition)
Computer Systems: A Programmer's Perspective Plus Mastering Engineering With Pearson Etext -- Access Card Package (3rd Edition)
3rd Edition
ISBN: 9780134123837
Author: Randal E. Bryant, David R. O'Hallaron
Publisher: PEARSON
Question
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Chapter 6.5, Problem 6.19PP

A.

Program Plan Intro

Given Information:

The definition for the code is mentioned below:

//Traverse through the grid

for (i =0; i < 16; i++)

{

for (j = 0; j < 16; j++)

{

//add values of x into grid

total_x += grid[j][i].x;

//add values of y into grid

total_y += grid[j][i].y;

}

}

B.

Program Plan Intro

Given Information:

The definition for the code is mentioned below:

//Traverse through the grid

for (i =0; i < 16; i++)

{

for (j = 0; j < 16; j++)

{

//add values of x into grid

total_x += grid[j][i].x;

//add values of y into grid

total_y += grid[j][i].y;

}

}

C.

Explanation of Solution

Miss rate:

  • The cache can only hold half of the elements in the array, so that means that a read to grid[8][0] will evict the block that was loaded when we read grid[0][0].  Since this block also contained grid[0][1], the first read of grid[0][1] will be a miss.
  • Hence, each iteration will have one hit and one miss. 
  • This means one will have 256 hits and 256 misses...

D.

Explanation of Solution

 New Miss Rate:

If the cache were twice as big the n it could hold the entire grid array and the only misses would be the initial cold miss...

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