modify argument help sentence

otx/cli/tools/train.py

@@ -140,7 +140,7 @@ def parse_args():
     parser.add_argument(
         "--gpus",
         type=str,
-        help="Enable multi gpu training. if number of gpu is more than one, then model is trained in each gpu with splited dataset.",
+        help="Comma-separated indcies of GPU. If there are more than one available GPU, then model is trained with multi GPUs.",
     )
     parser.add_argument(
         "--multi-gpu-port",
@@ -322,8 +322,9 @@ def run_child_process(rank: int, gpu_ids: List[int], output_path: str, multi_gpu
         if "--enable-hpo" in sys.argv:
             sys.argv.remove('--enable-hpo')
         MultiGPUManager.set_arguments_to_argv("--save-logs-to", output_path)
+
         MultiGPUManager.initialize_multigpu_train(rank, gpu_ids, multi_gpu_port)
-        print("*"*100, os.getpid())
+
         main()
 
     @staticmethod