Created by: luotao1

When profile multi-instance inference on pyramid_dnn, we find fc_op slows on it.

command:

• one instance:

./paddle/fluid/inference/tests/api/test_analyzer_pyramid_dnn --infer_model=third_party/inference_demo/pyramid_dnn/model/ --infer_data=third_party/inference_demo/pyramid_dnn/data.txt --gtest_filter=Analyzer_Pyramid_DNN.profile --paddle_num_threads=1 --repeat=10000 --zero_copy --warmup --num_threads=1

• two instance:

./paddle/fluid/inference/tests/api/test_analyzer_pyramid_dnn --infer_model=third_party/inference_demo/pyramid_dnn/model/ --infer_data=third_party/inference_demo/pyramid_dnn/data.txt --gtest_filter=Analyzer_Pyramid_DNN.profile --paddle_num_threads=1 --repeat=10000 --zero_copy --warmup --num_threads=2

result (latency)

The remove fc_op codes are:

--- a/paddle/fluid/inference/tests/api/analyzer_pyramid_dnn_tester.cc
+++ b/paddle/fluid/inference/tests/api/analyzer_pyramid_dnn_tester.cc
@@ -110,6 +110,7 @@ void SetConfig(AnalysisConfig *cfg) {
   if (FLAGS_zero_copy) {
     cfg->SwitchUseFeedFetchOps(false);
   }
+  cfg->pass_builder()->DeletePass("fc_fuse_pass");
 }