如果服务速率低于新工作的到达速率，则服务器将会跟不上，在有托管任务可对其进行调度前，新工作都将排队等候。
If the service rate drops below the arrival rate of new work, the server falls behind and new work is queued up until a managed task becomes available to dispatch it.
用户程序在DSP/BIOS的调度下按任务、中断的优先级排队等待执行。
The customer procedure wait in line adjusts a degree to descend at DSP/BIOS by priority.
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