PLEASE MODIFY THE BELOW CODE BY USING INTERRUPTS. #include #include #include #include #include using namespace std::chrono; using namespace std; #define NUM_THREADS 40 struct AddTask{ int v1,v2,v3; int start; int end; }; void randomVector(int vector[], int size) { for (int i = 0; i < size; i++) { vector[i] = rand() % 100; } } void AddVector(void* arg){ AddTask task = (struct AddTask ) arg; for(int i = task->start; i< task->end ; i++){ task->v3[i] = task->v2[i] + task->v1[i]; } } int main(void){ pthread_t threads[NUM_THREADS]; unsigned long size = 100000000; srand(time(0)); int v1, v2, v3; auto start = high_resolution_clock::now(); v1 = (int ) malloc(size * sizeof(int )); v2 = (int ) malloc(size * sizeof(int )); v3 = (int ) malloc(size * sizeof(int )); randomVector(v1, size); randomVector(v2, size); for (size_t i = 0; i < NUM_THREADS; i++) { struct AddTask task = (struct AddTask)malloc(sizeof(struct AddTask)); task->v1 = v1; task->v2 = v2; task->v3 = v3; task->start = size/NUM_THREADS i; task->end = i == NUM_THREADS - 1 ? size : (size/NUM_THREADS * (i+1)); pthread_create(&threads[i],NULL,AddVector,(void*)task); } for (size_t i = 0; i < NUM_THREADS; i++) { (void) pthread_join(threads[i], NULL); } auto stop = high_resolution_clock::now(); auto duration = duration_cast(stop - start); cout << "Number of threads " << NUM_THREADS << endl; cout << "Time taken by function: " << duration.count() << " microseconds" << endl; return 0; }

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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Question

PLEASE MODIFY THE BELOW CODE BY USING INTERRUPTS.

#include <iostream>
#include <cstdlib>
#include <time.h>
#include <chrono>
#include <pthread.h>

using namespace std::chrono;
using namespace std;
#define NUM_THREADS 40

struct AddTask{
int *v1,*v2,*v3;
int start;
int end;
};

void randomVector(int vector[], int size)
{
for (int i = 0; i < size; i++)
{

vector[i] = rand() % 100;
}
}

void *AddVector(void* arg){

AddTask *task = (struct AddTask *) arg;

for(int i = task->start; i< task->end ; i++){
task->v3[i] = task->v2[i] + task->v1[i];
}
}

int main(void){

pthread_t threads[NUM_THREADS];

unsigned long size = 100000000;

srand(time(0));

int *v1, *v2, *v3;

auto start = high_resolution_clock::now();

v1 = (int *) malloc(size * sizeof(int *));
v2 = (int *) malloc(size * sizeof(int *));
v3 = (int *) malloc(size * sizeof(int *));

randomVector(v1, size);

randomVector(v2, size);

for (size_t i = 0; i < NUM_THREADS; i++) {
struct AddTask *task = (struct AddTask*)malloc(sizeof(struct AddTask));
task->v1 = v1;
task->v2 = v2;
task->v3 = v3;
task->start = size/NUM_THREADS * i;
task->end = i == NUM_THREADS - 1 ? size : (size/NUM_THREADS * (i+1));

pthread_create(&threads[i],NULL,AddVector,(void*)task);
}

for (size_t i = 0; i < NUM_THREADS; i++) {

(void) pthread_join(threads[i], NULL);
}

auto stop = high_resolution_clock::now();

auto duration = duration_cast<microseconds>(stop - start);

cout << "Number of threads "
<< NUM_THREADS << endl;

cout << "Time taken by function: "
<< duration.count() << " microseconds" << endl;

return 0;
}

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