new_thread
CHECKr(pthread_create(&thread, &attr, new_thread, NULL));
CHECKr(pthread_create(&thread, NULL, new_thread, NULL));
CHECKr(pthread_create(&thread, NULL, new_thread,
CHECKr(pthread_create(&thread[i], NULL, new_thread,
CHECKr(pthread_create(&thread, NULL, new_thread,