[NPU] refine subgraph name (#3624)

lite/core/mir/subgraph/subgraph_pass_test.cc

@@ -25,6 +25,7 @@ DEFINE_string(optimized_model_dir, "", "path of optimized naive buffer model");
 DEFINE_string(input_tensor_shape, "1,3,224,224", "shape of input tensors");
 DEFINE_string(input_tensor_type, "float32", "data type of input tensors");
 DEFINE_string(output_tensor_type, "float32", "data type of output tensors");
+DEFINE_string(subgraph_model_cache_dir, "", "dir of subgraph model cache");
 
 namespace paddle {
 namespace lite {
@@ -132,7 +133,7 @@ std::shared_ptr<lite_api::PaddlePredictor> TestModel(
   mobile_config.set_model_from_file(optimized_model_dir + ".nb");
   mobile_config.set_power_mode(lite_api::PowerMode::LITE_POWER_HIGH);
   mobile_config.set_threads(1);
-  // mobile_config.set_subgraph_model_cache_dir("/data/local/tmp");
+  mobile_config.set_subgraph_model_cache_dir(FLAGS_subgraph_model_cache_dir);
   predictor = lite_api::CreatePaddlePredictor(mobile_config);
   FillInputTensors(predictor, input_tensor_shape, input_tensor_type, 1);
   // Run optimized model

lite/kernels/npu/subgraph_compute.cc

@@ -34,24 +34,16 @@ std::string SubgraphEngine::GenerateModelCacheName() const {
   auto inames = device_inames_;
   auto onames = device_onames_;
   std::sort(inames.begin(), inames.end());
-  std::sort(onames.begin(), onames.end());
 
-  std::string model_cache_name = "";
+  std::string model_cache_name = "subgraph_" + std::to_string(block_idx_);
   for (auto iname : inames) {
+    model_cache_name += "_";
     auto itensor = scope_->FindTensor(iname);
-    std::replace(iname.begin(), iname.end(), '/', '_');
-    model_cache_name += "_" + iname;
+    int tmp = 0;
     for (auto i : itensor->dims().Vectorize()) {
-      model_cache_name += "_" + std::to_string(i);
-    }
-  }
-  for (auto oname : onames) {
-    auto otensor = scope_->FindTensor(oname);
-    std::replace(oname.begin(), oname.end(), '/', '_');
-    model_cache_name += "_" + oname;
-    for (auto i : otensor->dims().Vectorize()) {
-      model_cache_name += "_" + std::to_string(i);
+      tmp += i * i;
     }
+    model_cache_name += std::to_string(tmp % 1999);
   }
   model_cache_name += "_.om";