多道7.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>0,5,dev1</step>
<step>5,15,cpu</step>
<step>16,21,dev2</step>
</unit>
<unit>
<program>B</program>
<step>0,4,cpu</step>
<step>4,12,dev2</step>
<step>12,17,cpu</step>
<step>17,21,dev1</step>
</unit>
<unit>
<program>C</program>
<step>0,7,cpu</step>
<step>7,11,dev1</step>
<step>11,14,cpu</step>
<step>14,21,dev2</step>
</unit>
</input>