sim_tasks_multiprocessing.py

def final_time(tasks, cooldown):
    # this question is actually about putting a serialized tasks into parallel task Q
    task_run_time = 1
    lastExcStart = {} # coreId:lastTask's Start Time
    sim_time = 0 
    for task in tasks:
        if task not in lastExcStart:
            # if no task is running on this core, init the queue with cuurent simTime
            lastExcStart[task] = sim_time
        else:
            # if this core had a task. propergate the simTime using the cooldown constrict 
            if sim_time - lastExcStart[task] >= task_run_time + cooldown:
                # if the sim time gap is larger than a cooldown, then you can start this task right away
                lastExcStart[task] = sim_time
            else:
                # if sime time gap is not enough, you need to add a cooldown time to it. 
                lastExcStart[task] += task_run_time + cooldown
                sim_time = lastExcStart[task]
    
    return sim_time + task_run_time
            

print(final_time([1, 1, 2, 1], 2))
print(final_time([1, 1, 2, 1, 2, 2], 2))