[fleet_executor] Take task node from python side (#38083)

paddle/fluid/distributed/fleet_executor/fleet_executor.cc

@@ -33,10 +33,22 @@ FleetExecutor::FleetExecutor(const std::string& exe_desc_str) {
 
 FleetExecutor::~FleetExecutor() { root_scope_->DropKids(); }
 
-void FleetExecutor::Init(const framework::ProgramDesc& program_desc,
-                         framework::Scope* scope,
-                         const platform::Place& place) {
+void FleetExecutor::Init(
+    const framework::ProgramDesc& program_desc, framework::Scope* scope,
+    const platform::Place& place, const std::vector<TaskNode*>& task_nodes,
+    const std::unordered_map<int64_t, int64_t>& task_id_to_rank) {
+  if (task_nodes.size() == 0) {
     runtime_graph_ = std::make_shared<RuntimeGraph>(program_desc, exe_desc_);
+  } else {
+    runtime_graph_ = std::make_shared<RuntimeGraph>();
+    std::unordered_map<int64_t, TaskNode*> interceptor_id_to_task;
+    for (auto task_node : task_nodes) {
+      int64_t interceptor_id = task_node->task_id();
+      interceptor_id_to_task.emplace(interceptor_id, task_node);
+    }
+    runtime_graph_->SetInterceptorIdToRank(task_id_to_rank);
+    runtime_graph_->SetInterceptorIdToNode(interceptor_id_to_task);
+  }
   root_scope_ = scope;
   place_ = place;
   PADDLE_ENFORCE_NOT_NULL(root_scope_, platform::errors::InvalidArgument(

paddle/fluid/distributed/fleet_executor/fleet_executor.h

@@ -30,6 +30,7 @@ namespace distributed {
 class RuntimeGraph;
 class Carrier;
 class MessageBus;
+class TaskNode;
 
 class FleetExecutor final {
  public:
@@ -37,7 +38,9 @@ class FleetExecutor final {
   explicit FleetExecutor(const std::string& exe_desc_str);
   ~FleetExecutor();
   void Init(const framework::ProgramDesc& program_desc, framework::Scope* scope,
-            const platform::Place& place);
+            const platform::Place& place,
+            const std::vector<TaskNode*>& task_nodes,
+            const std::unordered_map<int64_t, int64_t>& task_id_to_rank);
   void Run();
 
  private:

paddle/fluid/distributed/fleet_executor/runtime_graph.h

@@ -44,6 +44,14 @@ class RuntimeGraph final {
   const std::unordered_map<int64_t, int64_t>& intercepter_id_to_rank() const {
     return intercepter_id_to_rank_;
   }
+  void SetInterceptorIdToRank(
+      const std::unordered_map<int64_t, int64_t>& intercepter_id_to_rank) {
+    intercepter_id_to_rank_ = intercepter_id_to_rank;
+  }
+  void SetInterceptorIdToNode(
+      const std::unordered_map<int64_t, TaskNode*>& intercepter_id_to_node) {
+    intercepter_id_to_node_ = intercepter_id_to_node;
+  }
   std::string DebugString() const;
 
  private:

python/paddle/fluid/executor.py

@@ -1979,10 +1979,12 @@ class Executor(object):
             fleet_exe_desc.num_micro_batches = fleet_opt["num_micro_batches"]
         num_of_gpu = fleet_exe_desc.dp_degree * fleet_exe_desc.mp_degree * fleet_exe_desc.pp_degree
         assert nrank == num_of_gpu, "The number of rank is not equal to the number of gpu."
+        task_id_to_rank = fleet_opt.get("task_id_to_rank", {})
+        tasks = fleet_opt.get("tasks", [])
         fleet_exe = core.FleetExecutor(fleet_exe_desc.SerializeToString())
         place = core.Place()
         place.set_place(self.place)
-        fleet_exe.init(program.desc, scope, place)
+        fleet_exe.init(program.desc, scope, place, tasks, task_id_to_rank)
         return fleet_exe
 
     def _run_using_fleet_executor(self,