// Compile with:
// gcc -Wall -g -o sched_bind schedBind.c -lpthread

#include <pthread.h>   /* needs to be before stdio.h */
#include <stdlib.h>
#include <sys/errno.h>
//#include <sys/processor.h>
//#include <sys/thread.h>
#include <stdio.h>

#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#include <linux/unistd.h>
_syscall0(pid_t,gettid)
pid_t gettid(void);

#define SIZE 7000
#define TIMES 10000

int arr[4][SIZE];
int idx;

void* compute_thread(void*);

int  main(void)
{
	int i;
	pthread_t tid[8];     /* thread ID structure */
	pthread_attr_t attr;     /* thread attributes */
	char thread[4][4] ={"0", "1", "2", "3"};

	/* Initialize thread attribute structure */
	//pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);	// default anyway.

	for (idx = 0; idx < 8; idx++ ) {
		pthread_attr_init(&attr);
		pthread_create(&(tid[idx]), &attr, compute_thread, thread[(idx/2)]);
	}

	/* main thread */
	for (i= 0; i<8; i++)
		pthread_join(tid[i], NULL);

	printf("Main exit ...\n");
	exit(0);
}

/* The thread function to be run */
void* compute_thread(void* dummy)
{
	int i,j;
	int procNum;
	//     int res;

	procNum = atoi((char *)dummy);
	printf("Thread DS %d TID = %d\n", procNum, gettid());

	for (j=0; j<TIMES; j++) {
		for(i= 0; i< SIZE; i++)
			arr[procNum][(i*2345) % SIZE] = i;
	}
	printf("Thread DS %d, TID = %d running ended \n", procNum, gettid() );
	return(void *)0;
}