1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271
| ''' 参考链接:https://blog.csdn.net/qq_40877371/article/details/103753581 '''
import copy import random
class PCB:
def __init__(self, pid, name, priority, in_time, run_time): self.pid = pid self.name = name self.priority = priority self.in_time = in_time self.run_time = run_time
self.dy_priority = priority self.prialter_time = 999 self.in_times = 0 self.remain_time = run_time self.cpu_time = 0 self.start_time = 999 self.out_time = 999 self.turnaround_time = 999 self.Wturnaround_time = 999
def pre_output(self): print("PID "+str(self.pid) +"\t"+ "名称:" + self.name +'\t'+"优先级:"+ str(self.priority) +'\t'+"到达时间:"+str(self.in_time) +'\t'+"运行时间:"+ str(self.run_time))
def run_output(self): print("PID " + str(self.pid) +'\t'+"剩余时间:"+ str(self.remain_time) +'\t'+ "已工作时间:" + str(self.cpu_time)) def fin_output(self):
print("PID "+ str(self.pid) +"\t"+ "名称:" + self.name +"\t"+ "优先级:" + str(self.priority) +"\t"+ "到达时间:" + str(self.in_time) +"\t"+ "运行时间:" + str(self.cpu_time) +"\t"+ "开始时间:" + str(self.start_time) +"\t"+ "结束时间:" + str(self.out_time) +"\t"+ "周转时间:" + str(self.turnaround_time)+ "\t"+ "带权周转时间:" + str(self.Wturnaround_time))
def FCFS(pcb_list): time = 0 finish_list = [] while pcb_list: print("-"*20) print("当前时间:", time) if time >= pcb_list[0].in_time: if pcb_list[0].in_times == 0: print("进程" + str(pcb_list[0].pid) + " 开始运行") pcb_list[0].start_time = time pcb_list[0].in_times += 1 pcb_list[0].cpu_time += 1 pcb_list[0].run_output() if pcb_list[0].run_time == pcb_list[0].cpu_time: print("进程" + str(pcb_list[0].pid) + " 运行结束") pcb_list[0].out_time = time + 1 pcb_list[0].turnaround_time = pcb_list[0].out_time - pcb_list[0].in_time pcb_list[0].Wturnaround_time = round(pcb_list[0].turnaround_time / pcb_list[0].run_time, 2) finish_list.append(pcb_list[0]) pcb_list.remove(pcb_list[0]) time += 1 ''' for i in finish_list: AvgTurnaround_time += i.turnaround_time AvgWTurnaround_time += i.Wturnaround_time ''' return finish_list
def SJF(pcb_list): time = 0 finish_list = [] min_time = 0 is_run = False def ListSort_SJF(sortlist): ready_num = 0 for i in sortlist: if time >= i.in_time: ready_num += 1 if i.run_time < min_time: temp = i sortlist.remove(i) sortlist.insert(0, temp) if ready_num > 1: for j in range(ready_num - 1): for k in range(j+1, ready_num): if pcb_list[j].run_time > pcb_list[k].run_time: pcb_list[j].run_time, pcb_list[k].run_time = pcb_list[k].run_time, pcb_list[j].run_time return sortlist
while pcb_list: print("-"*20) print("当前时间:", time) if is_run == False: pcb_list = ListSort_SJF(pcb_list) if time >= pcb_list[0].in_time: is_run = True if pcb_list[0].in_times == 0: print("进程" + str(pcb_list[0].pid) + " 开始运行") pcb_list[0].start_time = time pcb_list[0].in_times += 1 pcb_list[0].cpu_time += 1 pcb_list[0].run_output() if pcb_list[0].run_time == pcb_list[0].cpu_time: print("进程" + str(pcb_list[0].pid) + " 运行结束") pcb_list[0].out_time = time + 1 pcb_list[0].turnaround_time = pcb_list[0].out_time - pcb_list[0].in_time pcb_list[0].Wturnaround_time = round(pcb_list[0].turnaround_time / pcb_list[0].run_time, 2) finish_list.append(pcb_list[0]) pcb_list.remove(pcb_list[0]) is_run = False time += 1 return finish_list
def RR(pcb_list): time = 0 finish_list =[] remove_time = pcb_list[0].in_time - 1 def ListSort_RR(sortlist): ready_num = 0 pcb_newlist = []
for i in sortlist: if time >= i.in_time: ready_num += 1 if i.in_times == 0: pcb_newlist.append(i.pid) if ready_num > 1: if time - 1 != remove_time: temp = sortlist.pop(0) sortlist.insert(ready_num-1 ,temp) if pcb_newlist: pcb_newlist.clear() return sortlist
while pcb_list: print("-"*20) print("当前时间:", time) pcb_list = ListSort_RR(pcb_list) if time >= pcb_list[0].in_time: if pcb_list[0].in_times == 0: print("进程" + str(pcb_list[0].pid) + " 开始运行") pcb_list[0].start_time = time pcb_list[0].in_times += 1 pcb_list[0].cpu_time += 1 pcb_list[0].remain_time -= 1 if pcb_list[0].dy_priority: pcb_list[0].dy_priority -= 1 pcb_list[0].prialter_time = time pcb_list[0].run_output() if pcb_list[0].remain_time == 0: print("进程" + str(pcb_list[0].pid) + " 运行结束") pcb_list[0].out_time = time + 1 pcb_list[0].turnaround_time = pcb_list[0].out_time - pcb_list[0].in_time pcb_list[0].Wturnaround_time = round(pcb_list[0].turnaround_time / pcb_list[0].run_time, 2) finish_list.append(pcb_list[0]) pcb_list.remove(pcb_list[0]) remove_time = time time += 1
return finish_list
def ListSort(pcb_list): for i in range(len(pcb_list)-1): for j in range(i+1, len(pcb_list)): if pcb_list[i].pid > pcb_list[j].pid: pcb_list[i],pcb_list[j] = pcb_list[j],pcb_list[i] for i in pcb_list: if i.start_time == 999: if int(i.pid)==0: print("-"*20) i.pre_output() else: if int(i.pid)==0: print("-"*20) i.fin_output() return pcb_list
def NewList_random(num): pcb_list = [] name_list = ["分配主存空间", "分配磁带机", "分配打印机", "用户输入数据", "刷新信息"] for i in range(num): pcb_list.append(PCB(str(i), name_list[random.randint(0, 4)], random.randint(1, 9), random.randint(0, 10), random.randint(1, 9))) for i in range(len(pcb_list)-1): for j in range(i+1, len(pcb_list)): if pcb_list[i].in_time > pcb_list[j].in_time: pcb_list[i],pcb_list[j] = pcb_list[j],pcb_list[i] return pcb_list
def NewList_record(num): pcb_list = [] for i in range(num): name = input("请输入%d号进程的名称:" % i) priority = int(input("请输入%d号进程的优先级:" % i)) in_time = int(input("请输入%d号进程的到达时间:" % i)) run_time = int(input("请输入%d号进程的运行时间:" % i)) pcb_list.append(PCB(str(i), name, priority, in_time, run_time)) for i in range(len(pcb_list) - 1): for j in range(i + 1, len(pcb_list)): if pcb_list[i].in_time > pcb_list[j].in_time: pcb_list[i], pcb_list[j] = pcb_list[j], pcb_list[i] return pcb_list
def ScheduleSlect(list1): templist = copy.deepcopy(list1)
def avg_output(list): AvgTurnaround_time = 0 AvgWTurnaround_time = 0 for i in list: AvgTurnaround_time += i.turnaround_time AvgWTurnaround_time += i.Wturnaround_time print("平均周转时间: "+ str(round(AvgTurnaround_time / len(list), 2))+"\t"+"平均带权周转时间: "+ str(round(AvgWTurnaround_time / len(list), 2)))
while True: list1 = copy.deepcopy(templist) print("-"*20) sch_num = input("1. 先来先服务 FCFS\n2. 短作业优先 SJF\n3. 时间片轮转 RR\n4. 重新输入数据\n请选择调度算法:") if sch_num == "1": list2 = copy.deepcopy(list1) ListSort(list2) list1 = FCFS(list1) ListSort(list1) avg_output(list1) elif sch_num == "2": list2 = copy.deepcopy(list1) ListSort(list2) list1 = SJF(list1) ListSort(list1) avg_output(list1) elif sch_num == "3": list2 = copy.deepcopy(list1) ListSort(list2) list1 = RR(list1) ListSort(list1) avg_output(list1) elif sch_num == '4': break else: print("输入错误,请重新输入!")
if __name__ == "__main__": while True: pcb_num = int(input("请输入进程个数(输入0退出):")) if pcb_num < 1 or pcb_num > 999: print("请输入正确的数据!") break input_type = int(input("1、随机生成\n2、手工输入\n请选择数据的输入方式:")) if input_type == 1: list1 = NewList_random(pcb_num) ScheduleSlect(list1) elif input_type == 2: list1 = NewList_record(pcb_num) ScheduleSlect(list1) else: print("输入有误,请重新输入!")
|