huajsj commented on a change in pull request #9108:
URL: https://github.com/apache/tvm/pull/9108#discussion_r724703336



##########
File path: src/runtime/pipeline/pipeline_executor.h
##########
@@ -36,25 +43,86 @@ namespace runtime {
  *
  *  This executor can be accessed by various language via TVM runtime 
PackedFunc API.
  */
-class TVM_DLL PipelineRuntime : public ModuleNode {
+class TVM_DLL PipelineExecutor : public ModuleNode {
  public:
   /*!
    * \Return the type key of the executor.
    */
-  const char* type_key() const final { return "PipelineRuntime"; }
+  const char* type_key() const final { return "PipelineExecutor"; }
   /*!
-   * \brief Initialize the pipeline executor with module array and json text.
+   * \brief Initialize the pipeline executor with module array and JSON text.
    * \param modules The module list used for building pipeline.
    * \param pipeline_json The configuration of modules dependencies.
    */
-  void Init(const Array<tvm::runtime::Module>& modules, const std::string& 
pipeline_json);
+  void Init(const Array<Module>& modules, const std::string& pipeline_json);
   /*!
    * \brief Give frontends an access to packed functions.
    * \param name The name of the function.
    * \param sptr_to_self The pointer to the module node.
    * \return The corresponding packed function.
    */
   virtual PackedFunc GetFunction(const std::string& name, const 
ObjectPtr<Object>& sptr_to_self);
+
+  /*!
+   * \brief Get the number of outputs.
+   *
+   * \return The number of outputs.
+   */
+  int NumOutputs() const { return num_outputs_; }
+
+ private:
+  /*!\brief The class used to execute pipeline logic.*/
+  PipelineScheduler pipeline_function_;
+  /*!\brief The Dependency information of each graph runtime module of the 
pipeline.*/
+  PipelineConfig pipeline_config_;
+  /*!\brief The Module information used to create graph runtime.*/
+  ModuleConfig mod_config_;
+  /*!\brief How many outputs are in this pipeline executor.*/
+  size_t num_outputs_ = 0;
+  /*!\brief Json loader.*/
+  void Load(dmlc::JSONReader* reader, bool load_module = false) {
+    reader->BeginArray();
+    while (reader->NextArrayItem()) {
+      std::string key;
+      reader->BeginObject();
+      int mod_idx = -1;
+      std::string lib_name;
+      std::string json_name;
+      std::string params_name;
+      std::string dev;
+      OutputMap output;
+      while (reader->NextObjectItem(&key)) {
+        if (key == "mod_idx") {
+          reader->Read(&mod_idx);
+        } else if (key == "lib_name") {
+          reader->Read(&lib_name);
+        } else if (key == "json_name") {
+          reader->Read(&json_name);
+        } else if (key == "params_name") {
+          reader->Read(&params_name);
+        } else if (key == "dev") {
+          reader->Read(&dev);
+        } else if (key == "output") {
+          reader->Read(&output);
+        } else {
+          LOG(FATAL) << "do not support key " << key;
+        }
+      }
+      // Check if mod_idx is read successfully, in this level reading there is 
no any moudle
+      // is PipelineExecutor, hence the mod_idx should start from 0.
+      ICHECK(mod_idx >= 0) << "Invalid mod_idx value " << mod_idx;
+      // Check if the output is read successfully.
+      ICHECK(!output.Empty()) << "Invalid output binding result.";
+      pipeline_config_.Insert(mod_idx, output);
+      // Load the lib, json, and params information.
+      if (load_module) {

Review comment:
       removed.




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