Overview

Thread Introduction

Threads

Motivation

Benefits of Multithreading

Why Thread?

Multithcore Programming

Challenges in Multicore Programming

User vs. Kernel Threads

Multithreading Models

Many-to-One

One-to-one

Many-to-Many

Threaded Case Study

Case Study

Shared-Memory Programming

What is Pthread?

Pthread Creation

#include <pthread.h>
#include <stdio.h>
#define NUM_THREADS 5

void *PrintHello(void *threadld) {
   long *data = (long *) threadld;
   printf("Hello World! tid = %ld\n", *data);
   pthread_exit(NULL);
}

int main() {
   pthread_t threads[NUM_THREADS];
   for(long tid = 0; tid < NUM_THREADS; tid++) {
      pthread_create(&threads[tid], NULL, PrintHello, (void *)&tid);
   }
   pthread_exit(NULL);

   return 0;
}