Youaregivenabunchofscientificcodethatcontainsloopsoftheform: for (i =0; i a[j][i] += b[j][i]; The matrices a and b are allocated using code such as: a = malloc (n* sizeof(*a)); for (i =0; i< n; i++) a[i]=malloc (n* sizeof(a[i])); While running the program, you notice that the addition loop trashes the TLB much more than it should. Explain why and provide a solution with justification for its efficiency. 2. What operating system challenges do devices like the Nook, Kindle and Ipad introduce? How are these challenges different from the requirements of traditional operating systems (i.e., OS running on traditional computers)?
Youaregivenabunchofscientificcodethatcontainsloopsoftheform: for (i =0; i a[j][i] += b[j][i]; The matrices a and b are allocated using code such as: a = malloc (n* sizeof(*a)); for (i =0; i< n; i++) a[i]=malloc (n* sizeof(a[i])); While running the program, you notice that the addition loop trashes the TLB much more than it should. Explain why and provide a solution with justification for its efficiency. 2. What operating system challenges do devices like the Nook, Kindle and Ipad introduce? How are these challenges different from the requirements of traditional operating systems (i.e., OS running on traditional computers)?
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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1. Youaregivenabunchofscientificcodethatcontainsloopsoftheform:
for (i =0; i a[j][i] += b[j][i];
The matrices a and b are allocated using code such as:
a = malloc (n* sizeof(*a)); for (i =0; i< n; i++)
a[i]=malloc (n* sizeof(a[i]));
While running the program , you notice that the addition loop trashes the TLB much more than it should. Explain why and provide a solution with justification for its efficiency.
2. What operating system challenges do devices like the Nook, Kindle and Ipad introduce? How are these challenges different from the requirements of traditional operating systems (i.e., OS running on traditional computers)?
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