Benchmark test over RoCE network

We ran test_internode.py over RoCE network with 4 H800 servers with 8 GPUs as per one server. But the test result is pretty poor by comparing with the case of 4 H800-servers on IB network.

case#1, 4 H800 servers on IB network

case#2, 4 H800 servers on RoCE nework
```
[tuning] Best dispatch (FP8): SMs 24, NVL chunk 8, RDMA chunk 8: 29.92 GB/s (RDMA), 60.35 GB/s (NVL)
[tuning] Best dispatch (BF16): SMs 24, NVL chunk 12, RDMA chunk 4: 29.54 GB/s (RDMA), 59.58 GB/s (NVL)
[tuning] Best combine: SMs 24, NVL chunk 1, RDMA chunk 16: 13.59 GB/s (RDMA), 27.41 GB/s (NVL)
```

I am not sure if we have the benchmark test result on RoCE network. Additionally, it would be highly appreciated if any comment.

Many thanks.