[Runtime][PipelineExecutor]Add forwarding queue logic for set input.

When the set_input function get called, a runtime of pipeline may not
yet finish the former computation work then the new set_input call would
break the current computation logic, to avoid such issue, we add the
forwarding queue logic to guarantee the order of input data consuming.

python/tvm/contrib/pipeline_executor.py

@@ -164,10 +164,7 @@ def set_input(self, key, value):
         value : array_like.
             The input value
         """
-        v = self._get_input(key)
-        if v is None:
-            raise RuntimeError("Could not find '%s' in pipeline's inputs" % key)
-        v.copyfrom(value)
+        self._set_input(key, tvm.nd.array(value))
 
     def set_params(self, params_group_name, params_data):
         """Set the parameter group value given the parameter group name. Note that the parameter

src/runtime/pipeline/pipeline_executor.cc

@@ -94,11 +94,7 @@ PackedFunc PipelineExecutor::GetFunction(const std::string& name,
  * \param data_in The input data.
  */
 void PipelineExecutor::SetInput(std::string input_name, DLTensor* data_in) {
-  std::pair<int, int> indexs = this->GetInputIndex(input_name);
-  if (indexs.first < 0 || indexs.first >= static_cast<int>(runtimes_.size())) {
-    LOG(FATAL) << "input name " << input_name << " not found.";
-  }
-  runtimes_[indexs.first]->SetInput(indexs.second, data_in);
+  global_runtime_->SetPipelineInput(input_name, data_in);
 }
 /*!
  * \brief get input from the runtime module.
@@ -118,7 +114,7 @@ NDArray PipelineExecutor::GetInput(std::string input_name) {
  * \return int The module index.
  */
 int PipelineExecutor::GetParamModuleIndex(const std::string& name) {
-  return param_connection_config[name];
+  return param_connection_config_[name];
 }
 /*!
  * \brief Using the global input name to get the index, and also get the input interface name
@@ -127,7 +123,7 @@ int PipelineExecutor::GetParamModuleIndex(const std::string& name) {
  * \return Returning the index and the input interface name of corresponding subgraph.
  */
 Array<String> PipelineExecutor::GetInputPipeplineMap(std::string input_name) {
-  std::pair<int, std::string> map = input_connection_config[input_name];
+  std::pair<int, std::string> map = input_connection_config_[input_name];
   return {std::to_string(map.first), map.second};
 }
 
@@ -137,11 +133,11 @@ Array<String> PipelineExecutor::GetInputPipeplineMap(std::string input_name) {
  * \return int The module index.
  */
 int PipelineExecutor::GetParamsGroupPipelineMap(const std::string& name) {
-  return param_connection_config[name];
+  return param_connection_config_[name];
 }
 
 /*!\brief Run the pipeline executor.*/
-void PipelineExecutor::Run() { pipeline_scheduler_.PipelineRun(runtimes_, pipeline_config_); }
+void PipelineExecutor::Run() { pipeline_scheduler_.PipelineRun(runtimes_); }
 /*!
  * \brief return A list of global output data.
  */
@@ -226,7 +222,7 @@ void PipelineExecutor::SetParam(std::string param_group_name, std::string param_
  * \return std::pair<int, int> A pair of module index and the input index.
  */
 std::pair<int, int> PipelineExecutor::GetInputIndex(const std::string& name) {
-  std::pair<int, std::string> index = input_connection_config[name];
+  std::pair<int, std::string> index = input_connection_config_[name];
   auto gruntime = runtimes_[index.first];
   return std::make_pair(index.first, gruntime->GetInputIndex(index.second));
 }
@@ -250,7 +246,9 @@ void PipelineExecutor::Init(const std::vector<Module>& modules, const std::strin
   num_outputs_ = pipeline_config_.GetGlobalOutputNum();
   // Initialize the pipeline function class used for pipeline thread pool management
   // and schedule etc. This function returns a list of runtime.
-  runtimes_ = pipeline_scheduler_.PipelineInit(modules, pipeline_config_);
+  global_runtime_ =
+      pipeline_scheduler_.PipelineInit(modules, pipeline_config_, input_connection_config_);
+  runtimes_ = global_runtime_->GetRuntimeList();
   return;
 }
 

src/runtime/pipeline/pipeline_executor.h

@@ -176,15 +176,16 @@ class TVM_DLL PipelineExecutor : public ModuleNode {
   /*!\brief The dependency information of each graph runtime module of the pipeline.*/
   ConfigPipelineExecution pipeline_config_;
   /*!\brief The map of global input and subgraph input.*/
-  InputConnectionConfig input_connection_config;
+  InputConnectionConfig input_connection_config_;
   /*!\brief The map includes global parameters groups and runtime modules.*/
-  ParamConnectionConfig param_connection_config;
+  ParamConnectionConfig param_connection_config_;
   /*!\brief The module information used to create the graph runtimes.*/
   ModuleConfig mod_config_;
   /*!\brief How many outputs are in this pipeline executor.*/
   size_t num_outputs_ = 0;
   /*!The list of backend runtime module.*/
   std::vector<std::shared_ptr<BackendRuntime>> runtimes_;
+  std::shared_ptr<GlobalRuntime> global_runtime_;
   /*!\brief Json loader.*/
   void LoadConfig(dmlc::JSONReader* reader) {
     reader->BeginObject();
@@ -193,9 +194,9 @@ class TVM_DLL PipelineExecutor : public ModuleNode {
       if (key == "module_connection") {
         reader->Read(&pipeline_config_);
       } else if (key == "input_connection") {
-        reader->Read(&input_connection_config);
+        reader->Read(&input_connection_config_);
       } else if (key == "param_connection") {
-        reader->Read(&param_connection_config);
+        reader->Read(&param_connection_config_);
       } else {
         LOG(FATAL) << "do not support key " << key;
       }

src/runtime/pipeline/pipeline_scheduler.cc

@@ -28,16 +28,20 @@ namespace runtime {
  * \param modules The list of graph executor modules.
  * \param pipeline_conf The dependency information of each graph executor module.
  */
-std::vector<std::shared_ptr<BackendRuntime>> PipelineScheduler::PipelineInit(
-    const std::vector<Module>& modules, const ConfigPipelineExecution& pipeline_config) {
+std::shared_ptr<GlobalRuntime> PipelineScheduler::PipelineInit(
+    const std::vector<Module>& modules, const ConfigPipelineExecution& pipeline_config,
+    const InputConnectionConfig& input_connection_config) {
   std::vector<std::shared_ptr<BackendRuntime>> runtimes;
   graph_modules_ = modules;
-  global_runtime_ = std::make_shared<GlobalRuntime>(GLOBAL_MODULE_INDEX);
   // Creating a list of runtimes.
   for (size_t i = 0; i < graph_modules_.size(); i++) {
     auto run_item = std::make_shared<BackendRuntime>(graph_modules_[i], i);
     runtimes.push_back(run_item);
   }
+  // Creating the global runtime to represent the pipeline executor.
+  global_runtime_ = std::make_shared<GlobalRuntime>(GLOBAL_MODULE_INDEX);
+  // Initialize the data structures that are used by pipeline logic.
+  global_runtime_->InitializePipeline(input_connection_config, runtimes);
   // Creating a list of NDArray in order to storage the outputs data.
   auto global_output_map = pipeline_config.GetGlobalConfigOutputBindings();
   for (size_t i = 0; i < global_output_map.size(); i++) {
@@ -52,15 +56,14 @@ std::vector<std::shared_ptr<BackendRuntime>> PipelineScheduler::PipelineInit(
   for (auto runtime : runtimes) {
     runtime->InitializePipeline(pipeline_config, &runtimes, global_runtime_);
   }
-  return runtimes;
+  return global_runtime_;
 }
 /*!
  * \brief Running pipeline logic.
  * \param runtimes A list of backend runtime modules.
  * \param pipeline_config The dependency configuration of each runtime module.
  */
-void PipelineScheduler::PipelineRun(const std::vector<std::shared_ptr<BackendRuntime>>& runtimes,
-                                    ConfigPipelineExecution pipeline_config) {
+void PipelineScheduler::PipelineRun(const std::vector<std::shared_ptr<BackendRuntime>>& runtimes) {
   runtimes.front()->RunPipeline();
 }
 /*!

src/runtime/pipeline/pipeline_scheduler.h

@@ -41,15 +41,14 @@ class PipelineScheduler {
    * \param modules The list of graph executor module.
    * \param pipeline_config The dependency information of each graph executor module.
    */
-  std::vector<std::shared_ptr<BackendRuntime>> PipelineInit(
-      const std::vector<Module>& modules, const ConfigPipelineExecution& pipeline_config);
+  std::shared_ptr<GlobalRuntime> PipelineInit(const std::vector<Module>& modules,
+                                              const ConfigPipelineExecution& pipeline_config,
+                                              const InputConnectionConfig& input_connection_config);
   /*!
    * \brief Running the pipeline logic.
    * \param runtimes A list of backend runtime modules.
-   * \param pipeline_config The dependency configuration of each runtime module.
    */
-  void PipelineRun(const std::vector<std::shared_ptr<BackendRuntime>>& runtimes,
-                   ConfigPipelineExecution pipeline_config);
+  void PipelineRun(const std::vector<std::shared_ptr<BackendRuntime>>& runtimes);
   /*!
    * \brief Get a list of outputs.
    */