多道4.txt

操作系统 程序实现一个虚拟机模拟多道的运行环境

<input>
<unit>
<program>A</program>
<step>0,10,cpu</step>
<step>10,15,dev1</step>
<step>15,20,cpu</step>
<step>20,30,dev2</step>
<step>30,40,cpu</step>
<step>40,51,dev1</step>
</unit>
<unit>
<program>B</program>
<step>0,10,dev1</step>
<step>10,20,cpu</step>
<step>20,25,dev2</step>
<step>25,30,cpu</step>
<step>30,40,dev2</step>
<step>40,52,cpu</step>
</unit>
<unit>
<program>C</program>
<step>0,13,cpu</step>
<step>13,15,dev2</step>
<step>15,20,dev3</step>
<step>20,35,dev1</step>
<step>35,40,cpu</step>
<step>40,45,dev4</step>
<step>45,51,dev1</step>
</unit>
<unit>
<program>D</program>
<step>0,18,dev3</step>
<step>18,25,dev1</step>
<step>25,30,cpu</step>
<step>30,35,dev3</step>
<step>35,48,dev2</step>
<step>48,51,cpu</step>
</unit>
<unit>
<program>E</program>
<step>0,6,dev3</step>
<step>6,12,dev1</step>
<step>12,21,cpu</step>
<step>21,30,dev3</step>
<step>30,43,dev2</step>
<step>43,52,dev4</step>
</unit>
<unit>
<program>F</program>
<step>0,18,dev3</step>
<step>18,24,dev1</step>
<step>24,29,cpu</step>
<step>29,35,dev3</step>
<step>35,48,dev2</step>
</unit>
<unit>
<program>G</program>
<step>0,18,cpu</step>
<step>18,26,dev1</step>
<step>26,32,cpu</step>
<step>32,35,dev3</step>
<step>35,48,dev2</step>
<step>48,51,cpu</step>
</unit>
<unit>
<program>H</program>
<step>0,14,dev3</step>
<step>14,24,dev1</step>
<step>24,30,cpu</step>
<step>30,34,dev3</step>
<step>34,48,dev2</step>
</unit>
</input>