[理工] [OS]-政大98
7. Consider a multi-level feedback queue in a single-CPU system.The first
level(queue 0) is given a quantum of 8 ms, the second one a quantum of
16 ms,the third is scheduled FCFS.Assume six jobs (J1~J6) arrive at
time 0 with the following job times(in ms):4,7,12,15,25 and 30
c. Compute the response time
Gantt chart
J1 J2 J3 J4 J5 J6 J3 J4 J5 J6 J5 J6
0 4 11 19 27 35 43 47 54 70 86 87 93
我想問的是respomse time 應該是系統產生第一個回應的時間，即
考慮Gantt chart中每個process第一段的時間間距，是否正確?
以本題為例:
Job 我寫的response time 洪兔的response time
J1 0 4
J2 4 11
J3 11 19
J4 19 27
J5 27 35
J6 35 43
不知道誰寫的才是對的?
感謝~
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 219.84.63.154
※ 編輯: stevenwin 來自: 219.84.63.154 (03/04 20:08)
推
03/04 20:15, , 1F
03/04 20:15, 1F
→
03/04 20:19, , 2F
03/04 20:19, 2F
推
03/04 20:19, , 3F
03/04 20:19, 3F
→
03/04 20:21, , 4F
03/04 20:21, 4F
→
03/04 20:22, , 5F
03/04 20:22, 5F
→
03/04 20:24, , 6F
03/04 20:24, 6F
推
03/04 20:24, , 7F
03/04 20:24, 7F
→
03/04 20:25, , 8F
03/04 20:25, 8F
→
03/04 20:25, , 9F
03/04 20:25, 9F
→
03/04 20:27, , 10F
03/04 20:27, 10F
→
03/04 20:28, , 11F
03/04 20:28, 11F
→
03/04 20:33, , 12F
03/04 20:33, 12F
推
03/05 07:52, , 13F
03/05 07:52, 13F
※ 編輯: stevenwin 來自: 219.85.29.170 (03/05 18:14)
※ 編輯: stevenwin 來自: 219.85.159.52 (03/06 16:48)