brandonio21 / ucsd-cs120-wi16-pa2-tester Goto Github PK

/* check if all process are exited */
  if (get_next_sched()) {
    Printf("FIFO ERR: Not all processes have exited\n");
    failCounter++;
  }

The tester program called "get_next_sched()" to check if all processes have existed, but when the operating system use a FIFO scheduler, the "get_next_sched()" may only be called at the time after a process exist (Since there is no preempt) . Therefore, we might assume that "get_next_sched()" may never be called after all processes exists, which means that we don't need to check if there is no process to exit in the "SchedProc()". If we implement our algorithm in that way, the auto tester may output wrong results like this (all the processes have in fact exited but it says not)!

FIFO ERR: Not all processes have exited

/* check if all process are exited */
  if (get_next_sched()) {
    Printf("FIFO ERR: Not all processes have exited\n");
    failCounter++;
  }

The tester program called "get_next_sched()" to check if all processes have exited, but when the operating system use a FIFO scheduler, the "get_next_sched()" may only be called at the time after a process exit (Since there is no preempt) . Therefore, we might assume that "get_next_sched()" may never be called after all processes exits, which means that we don't need to check if there is no process to exit in the "SchedProc()". If we implement our algorithm in that way, the auto tester may output wrong results like this (all the processes have in fact exited but it says not)!

FIFO ERR: Not all processes have exited