modified rb head and infer_benchmark

ppocr/modeling/heads/rec_robustscanner_head.py

@@ -465,9 +465,6 @@ class PositionAttentionDecoder(BaseDecoder):
         _, c_feat, _, _ = feat.shape
         assert c_feat == self.dim_input
 
-        # the _get_position_index is not ok for export_model
-        # position_index = self._get_position_index(self.max_seq_len, n)
-
         position_out_enc = self.position_aware_module(out_enc)
         
         query = self.embedding(position_index)

test_tipc/configs/rec_r31_robustscanner/train_infer_python.txt

@@ -49,4 +49,6 @@ inference:tools/infer/predict_rec.py --rec_char_dict_path=./ppocr/utils/dict90.t
 --save_log_path:./test/output/
 --benchmark:True
 null:null
+===========================infer_benchmark_params==========================
+random_infer_input:[{float32,[3,48,160]}]