[LLM] First commit the llm deployment code

fastdeploy/distributed/communication_op.py

@@ -0,0 +1,25 @@
+"""
+# Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+
+import paddle
+import paddle.distributed as dist
+
+
+def tensor_model_parallel_all_reduce(input_: paddle.Tensor) -> paddle.Tensor:
+    """All-reduce the input tensor across model parallel group."""
+    hcg = dist.fleet.get_hybrid_communicate_group()
+    mp_group = hcg.get_model_parallel_group()
+    dist.all_reduce(input_, group=mp_group)