[PD] Fix Assertion failed: /DeepEP/csrc/kernels/internode.cu:483, condition: ibgda_get_state()->num_rc_per_pe >= num_channels sgl-project#134 (sgl-project#5830)

Author: whybeyoung

python/sglang/srt/layers/moe/ep_moe/token_dispatcher.py

@@ -84,9 +84,7 @@ def get_deepep_buffer(
             num_nvl_bytes,
             num_rdma_bytes,
             low_latency_mode=deepep_mode.enable_low_latency(),
-            num_qps_per_rank=(
-                num_experts // group.size() if deepep_mode.enable_low_latency() else 1
-            ),
+            num_qps_per_rank=(max(num_experts // group.size(), Buffer.num_sms // 2)),
         )
         return cls._buffer