deepseek-ai / deepseek-ai/DeepEP

When running the two-machine test_low_latency.py (EP16), there is a significant difference in the test results between two machine

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Description

When running the two-machine test_low_latency.py (EP16), there is a significant difference in the test results of dispatch and combine on the two machines. My version number is 9fe9021, and I haven't modified any code. As follows. I'm not sure if it's my machine's network that's malfunctioning. @sphish

**_Machine 1 8 GPU_**

![Image](https://github.com/user-attachments/assets/c5618999-a2d7-47b0-9130-d773b142c8e2)

**_Machine 2 8 GPU_**

![Image](https://github.com/user-attachments/assets/84ff596e-cc19-45b4-8fc5-28fdc21a9a2d)

**_Version_**

![Image](https://github.com/user-attachments/assets/68fb7be4-56d8-4e26-a636-ed1b8587983a)

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