void init() {
signal(SIGUSR1, &signal1);
printf("[Init][Pid: %d] Scheduler Testing Program\n", sched_getpid());
sched_nice(-20);
for (int i = 0; i < 15; i++) {
if (sched_fork() == 0) {
printf("[Child][Pid: %d] Parent Pid: %d\n", sched_getpid(), sched_getppid());
sched_nice(-19 + i);
struct timespec start, stop;
clock_gettime(CLOCK_REALTIME, &start);
for (long int j = 0; j < 1000000000; j++);
clock_gettime(CLOCK_REALTIME, &stop);
printf("[Child][Pid: %d] Execution Complete. Took %ld Seconds.\n", sched_getpid(), (long int)(stop.tv_sec - start.tv_sec));
sched_exit(i);
printf("[Child][Pid: %d] This Will Never Get Executed\n", sched_getpid());
}
}
printf("[Init][Pid: %d] Process Information\n", sched_getpid());
sched_ps();
for (int i = 0; i < 15; i++) {
int returncode;
int cc = sched_wait(&returncode);
printf("[Init][Pid: %d] Child Returned [%d] With Exit Code [%d]\n", sched_getpid(), cc, returncode);
}
int returncode;
int cc = sched_wait(&returncode);
printf("[Init][Pid: %d] Calling Wait With No Children Returns [%d]\n", sched_getpid(), cc);
sched_sleep(&wait1);
for (int i = 0; i < 15; i++) {
if (sched_fork() == 0) {
printf("[Child][Pid: %d] Parent Pid: %d\n", sched_getpid(), sched_getppid());
sched_nice(-19 + i);
if (i % 2 == 1)
sched_sleep(&wait1);
else
sched_sleep(&wait2);
printf("[Child][Pid: %d] Execution Complete.\n", sched_getpid());
sched_exit(i);
}
}
for (int i = 0; i < 1000000000; i++);
printf("[Init][Pid: %d] Process Information\n", sched_getpid());
sched_ps();
printf("Wakeup 2\n");
sched_wakeup(&wait2);
printf("Wakeup 1\n");
sched_wakeup(&wait1);
for (int i = 0; i < 15; i++) {
int returncode;
int cc = sched_wait(&returncode);
printf("[Init][Pid: %d] Child Returned [%d] With Exit Code [%d]\n", sched_getpid(), cc, returncode);
}
printf("[Init][Pid: %d] Exiting Testing Program. Passing Control Back To Idle\n", sched_getpid());
sched_exit(0);
}
void parent() {
fprintf(stdout, "Process %d with parent %d start\n", sched_getpid(), sched_getppid());
int i, code;
for (i = -2; i < 2; i += 1) {
sched_wait(&code);
fprintf(stdout, "Process %d exited\n", code);
}
return;
}
void child() {
fprintf(stdout, "Process %d with parent %d start\n", sched_getpid(), sched_getppid());
long long i;
for (i = 0; i < 1000000000; i++) {
if ((i % 100000000) == 0) {
fprintf(stdout, "Process %d at %d\n", sched_getpid(), i);
}
}
sched_exit(sched_getpid());
}
void child1()
{
fprintf(stderr,"HIIII child here! my pid is %d and my parent is %d\n",sched_getpid(),sched_getppid());
long long i;
for (i = 0; i < 1000000000; i++)
{
if (i%100000000==0)
{
fprintf(stderr,"pid=%d, i=%lld, ticks=%d\n",sched_getpid(),i,sched_gettick());
}
}
sched_exit(85);
}
void parent()
{
fprintf(stderr,"parent hello world my pid is %d and my parent is %d\n",sched_getpid(),sched_getppid());
long long i;
for (i = 0; i < 1000000000; i++)
{
if (i%100000000==0)
{
fprintf(stderr,"pid=%d, i=%lld, ticks=%d\n",sched_getpid(),i,sched_gettick());
}
}
int ret;
sched_wait(&ret);
printf("one child returned %d\n",ret);
sched_wait(&ret);
printf("another child returned %d\n",ret);
sched_exit(0);
}
