#include <pthread.h>
#include <stdio.h>

void *thread(void *arg)
{
  return NULL;
}

main()
{
  pthread_t tid[1000];
  int i;
  int j;
  void *retval;

  j = 0;
  while(1) {
    printf("j = %d\n", j);
    j++;
    for (i = 0; i < 1000; i++) {
      if (pthread_create(tid+i, NULL, thread, NULL) != 0) {
        perror("pthread_create");
        exit(1);
      }
    }
    sleep(2);
    for (i = 0; i < 1000; i++) {
      pthread_join(tid[i], &retval);
    }
  }
}