[Infer] Add pir_model path for server infer. (PaddlePaddle#9790)

Author: aooxin

llm/server/server/server/engine/infer.py

@@ -25,6 +25,7 @@
 import paddle
 import paddle.distributed as dist
 import paddle.distributed.fleet as fleet
+from paddle.base.framework import use_pir_api
 from paddlenlp.trl.llm_utils import get_rotary_position_embedding
 from paddlenlp_ops import step_paddle
 from server.data.processor import DataProcessor
@@ -467,32 +468,16 @@ def _init_predictor(self):
         predictor init
         """
         device_id = self.rank % 8
-        self.model_file = os.path.join(self.model_dir, f"model.pdmodel")
-        self.param_file = os.path.join(self.model_dir, f"model.pdiparams")
+        if use_pir_api():
+            self.model_file = os.path.join(self.model_dir, f"model.json")
+            self.param_file = os.path.join(self.model_dir, f"model.pdiparams")
+        else:
+            self.model_file = os.path.join(self.model_dir, f"model.pdmodel")
+            self.param_file = os.path.join(self.model_dir, f"model.pdiparams")
         config = paddle.inference.Config(self.model_file, self.param_file)
 
-        config.switch_ir_optim(False)
         config.enable_use_gpu(100, device_id)
 
-        # distributed config
-        if self.mp_degree > 1:
-            trainer_endpoints = fleet.worker_endpoints()
-            current_endpoint = trainer_endpoints[self.rank]
-            dist_config = config.dist_config()
-            dist_config.set_ranks(self.nranks, self.rank)
-            dist_config.set_endpoints(trainer_endpoints, current_endpoint)
-            dist_config.enable_dist_model(True)
-            if self.config.distributed_config_path:
-                 dist_config.set_comm_init_config(self.config.distributed_config_path)
-            else:
-                raise Exception("Please set DISTRIBUTED_CONFIG env variable.")
-                logger.warning(
-                    f"Use default distributed config, please set env DISTRIBUTED_CONFIG"
-                )
-                dist_config.set_comm_init_config(
-                    os.path.join(Dir_Path + "/config", "rank_mapping_mp{}.csv".format(self.nranks)))
-
-            config.set_dist_config(dist_config)
         self.predictor = paddle.inference.create_predictor(config)
         self.input_names = self.predictor.get_input_names()
         self.seq_lens_handle = self.predictor.get_input_handle('seq_lens_this_time')