Process Scheduling Algorithm Simulation实现
时间: 2024-03-08 11:47:31 浏览: 21
好的,我明白了。您的问题是如何实现进程调度算法模拟。下面是一个简单的示例代码,可以帮助您实现此功能:
```python
class Process:
def __init__(self, name, arrival_time, burst_time):
self.name = name
self.arrival_time = arrival_time
self.burst_time = burst_time
self.waiting_time = 0
self.turnaround_time = 0
self.completion_time = 0
class Scheduler:
def __init__(self, processes):
self.processes = processes
def fcfs(self):
current_time = 0
for process in self.processes:
if current_time < process.arrival_time:
current_time = process.arrival_time
process.completion_time = current_time + process.burst_time
process.turnaround_time = process.completion_time - process.arrival_time
process.waiting_time = process.turnaround_time - process.burst_time
current_time = process.completion_time
def sjf(self):
current_time = 0
remaining_processes = self.processes[:]
while remaining_processes:
next_process = min(remaining_processes, key=lambda x: x.burst_time)
remaining_processes.remove(next_process)
if current_time < next_process.arrival_time:
current_time = next_process.arrival_time
next_process.completion_time = current_time + next_process.burst_time
next_process.turnaround_time = next_process.completion_time - next_process.arrival_time
next_process.waiting_time = next_process.turnaround_time - next_process.burst_time
current_time = next_process.completion_time
def print_results(self):
for process in self.processes:
print(f"{process.name}:\tCompletion Time: {process.completion_time}\tTurnaround Time: {process.turnaround_time}\tWaiting Time: {process.waiting_time}")
```
这段代码定义了两个类:Process和Scheduler。Process类表示一个进程,其中包含进程名、到达时间、执行时间、等待时间、周转时间和完成时间等属性。Scheduler类表示一个调度器,其中包含一个进程列表,以及fcfs()和sjf()两个方法,分别实现先来先服务和短作业优先两种调度算法。print_results()方法用于打印每个进程的完成时间、周转时间和等待时间。
可以使用以下代码创建一些进程,并将它们传递给Scheduler类的实例:
```python
processes = [
Process("P1", 0, 5),
Process("P2", 1, 3),
Process("P3", 2, 8),
Process("P4", 3, 6)
]
scheduler = Scheduler(processes)
scheduler.fcfs()
scheduler.print_results()
scheduler = Scheduler(processes)
scheduler.sjf()
scheduler.print_results()
```
这将创建四个进程,并将它们传递给Scheduler类的实例。然后,使用fcfs()和sjf()方法分别模拟先来先服务和短作业优先两种调度算法,并使用print_results()方法打印结果。
希望这可以帮助您实现进程调度算法模拟。如果您有任何其他问题,请随时问我。