SGLang vs vLLM：优先级调度、限流、淘汰策略对比一、优先级调度维度SGLangvLLM默认策略FCFS（First Come First Serve）FCFS优先级模式--enable-priority-schedulingscheduling="priority"优先级方向默认高数值=高优先级；schedule_low_priority_values_first可反转低数值=高优先级（min-heap）排序方式(priority * sign, wait_queue_entry_time)(priority, arrival_time, request_id)