[Fleet Executor] Support multi carrier (#38535)

paddle/fluid/distributed/fleet_executor/carrier.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "paddle/fluid/distributed/fleet_executor/carrier.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
 #include "paddle/fluid/distributed/fleet_executor/interceptor.h"
 #include "paddle/fluid/distributed/fleet_executor/interceptor_message_service.h"
 #include "paddle/fluid/distributed/fleet_executor/message_bus.h"
@@ -27,16 +28,32 @@ namespace distributed {
 USE_INTERCEPTOR(Compute);
 USE_INTERCEPTOR(Amplifier);
 
-void Carrier::Init(int64_t rank, std::shared_ptr<RuntimeGraph> runtime_graph,
-                   framework::Scope* root_scope,
-                   framework::Scope* minibatch_scope,
+void Carrier::Init(
+    int64_t rank,
+    const std::unordered_map<int64_t, int64_t>& interceptor_id_to_rank,
+    const std::unordered_set<int64_t>& interceptor_ids) {
+  rank_ = rank;
+  interceptor_id_to_rank_ = interceptor_id_to_rank;
+  interceptor_ids_ = interceptor_ids;
+
+  // TODO(fleet_exe dev): thread pool
+  thread_num_ = 1;
+  thread_pool_.SetThreadNum(thread_num_);
+  thread_pool_.Start();
+}
+
+void Carrier::Init(
+    int64_t rank,
+    const std::unordered_map<int64_t, int64_t>& interceptor_id_to_rank,
+    const std::unordered_set<int64_t>& interceptor_ids,
+    const std::unordered_map<int64_t, TaskNode*>& interceptor_id_to_node,
+    framework::Scope* root_scope, framework::Scope* minibatch_scope,
     const std::vector<framework::Scope*>& microbatch_scopes,
     const platform::Place& place) {
-  PADDLE_ENFORCE_EQ(is_init_, false, platform::errors::AlreadyExists(
-                                         "Carrier is already init."));
   rank_ = rank;
-  runtime_graph_ = runtime_graph;
-  interceptor_id_to_rank_ = runtime_graph_->interceptor_id_to_rank();
+  interceptor_id_to_rank_ = interceptor_id_to_rank;
+  interceptor_ids_ = interceptor_ids;
+  interceptor_id_to_node_ = interceptor_id_to_node;
   minibatch_scope_ = minibatch_scope;
   microbatch_scopes_ = microbatch_scopes;
   place_ = place;
@@ -72,8 +89,6 @@ bool Carrier::EnqueueInterceptorMessage(
   return true;
 }
 
-void Carrier::Barrier() { msg_bus_->Barrier(); }
-
 Interceptor* Carrier::GetInterceptor(int64_t interceptor_id) {
   auto iter = interceptor_idx_to_interceptor_.find(interceptor_id);
   PADDLE_ENFORCE_NE(iter, interceptor_idx_to_interceptor_.end(),
@@ -100,7 +115,8 @@ void Carrier::Start() {
                         "Using message bus since it has not been initialized. "
                         "Please invoke MessageBus::Init() before using it or "
                         "neccessary components are not ready."));
-
+  PADDLE_ENFORCE_EQ(is_init_, true, platform::errors::PreconditionNotMet(
+                                        "Using carrier before initialized."));
   for (int64_t id : source_interceptor_ids_) {
     VLOG(3) << "Carrier Start is sending start to source interceptor " << id
             << ".";
@@ -140,7 +156,9 @@ bool Carrier::Send(const InterceptorMessage& msg) {
   if (src_rank == dst_rank) {
     VLOG(3) << "Send a message from interceptor " << src_id
             << " to interceptor " << dst_id << ", which are in the same ranks.";
-    return EnqueueInterceptorMessage(msg);
+    int64_t carrier_id = *GlobalMap<int64_t, int64_t>::Get(dst_id);
+    return GlobalMap<int64_t, Carrier>::Get(carrier_id)
+        ->EnqueueInterceptorMessage(msg);
   } else {
     PADDLE_ENFORCE_NOT_NULL(
         msg_bus_.get(),
@@ -174,6 +192,9 @@ Interceptor* Carrier::SetInterceptor(int64_t interceptor_id,
       loop, platform::errors::Fatal("thread task loop must not null"));
   interceptor->RegisterTaskLoop(loop);
 
+  // TODO(liyurui): Using struct InterceptorID replace int64_t
+  GlobalMap<int64_t, int64_t>::Create(interceptor_id, carrier_id_);
+
   auto* ptr = interceptor.get();
   interceptor_idx_to_interceptor_.insert(
       std::make_pair(interceptor_id, std::move(interceptor)));
@@ -199,15 +220,19 @@ static std::shared_ptr<framework::GarbageCollector> GetGC(
 }
 
 void Carrier::CreateInterceptors() {
-  if (runtime_graph_->interceptor_id_to_node().empty()) return;
+  if (interceptor_ids_.empty()) return;
 
   auto gc = GetGC(place_);
 
   // create each Interceptor
   // no auto init since there is no config
-  for (const auto& item : runtime_graph_->interceptor_id_to_node()) {
-    int64_t interceptor_id = item.first;
-    TaskNode* task_node = item.second;
+  for (int64_t interceptor_id : interceptor_ids_) {
+    const auto& task_node_iter = interceptor_id_to_node_.find(interceptor_id);
+    PADDLE_ENFORCE_NE(
+        task_node_iter, interceptor_id_to_node_.end(),
+        platform::errors::NotFound("Can not find task node for interceptor %ld",
+                                   interceptor_id));
+    TaskNode* task_node = task_node_iter->second;
 
     PADDLE_ENFORCE_LT(
         task_node->run_at_offset(), task_node->run_per_steps(),

paddle/fluid/distributed/fleet_executor/carrier.h

@@ -45,16 +45,16 @@ class MessageBus;
 
 class Carrier final {
  public:
-  Carrier() = default;
-  Carrier(int64_t rank,
-          const std::unordered_map<int64_t, int64_t>& interceptor_id_to_rank)
-      : rank_(rank), interceptor_id_to_rank_(interceptor_id_to_rank) {
-    thread_num_ = 1;
-    thread_pool_.SetThreadNum(thread_num_);
-    thread_pool_.Start();
-  }
+  explicit Carrier(int64_t carrier_id) : carrier_id_(carrier_id) {}
   ~Carrier();
-  void Init(int64_t rank, std::shared_ptr<RuntimeGraph> runtime_graph,
+  void Init(int64_t rank,
+            const std::unordered_map<int64_t, int64_t>& interceptor_id_to_rank,
+            const std::unordered_set<int64_t>& interceptor_ids);
+  void Init(
+      int64_t rank,
+      const std::unordered_map<int64_t, int64_t>& interceptor_id_to_rank,
+      const std::unordered_set<int64_t>& interceptor_ids,
+      const std::unordered_map<int64_t, TaskNode*>& interceptor_id_to_node,
       framework::Scope* root_scope, framework::Scope* minibatch_scope,
       const std::vector<framework::Scope*>& microbatch_scopes,
       const platform::Place& place);
@@ -83,10 +83,9 @@ class Carrier final {
 
   bool Send(const InterceptorMessage& msg);
 
-  void Barrier();
-
  private:
   DISABLE_COPY_AND_ASSIGN(Carrier);
+  Carrier() = delete;
 
   // create each Interceptor
   void CreateInterceptors();
@@ -108,13 +107,14 @@ class Carrier final {
   framework::Scope* minibatch_scope_;
   paddle::platform::Place place_;
   paddle::platform::DeviceContext* dev_ctx_{nullptr};
-  std::shared_ptr<RuntimeGraph> runtime_graph_;
   std::shared_ptr<MessageBus> msg_bus_;
   int64_t rank_;
+  int64_t carrier_id_;
+  std::unordered_map<int64_t, TaskNode*> interceptor_id_to_node_;
   std::unordered_map<int64_t, int64_t> interceptor_id_to_rank_;
-
   int thread_num_;
   TaskLoopThreadPool thread_pool_;
+  std::unordered_set<int64_t> interceptor_ids_;
 };
 
 }  // namespace distributed

paddle/fluid/distributed/fleet_executor/fleet_executor.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "paddle/fluid/distributed/fleet_executor/fleet_executor.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
 #include "paddle/fluid/distributed/fleet_executor/message_bus.h"
 #include "paddle/fluid/distributed/fleet_executor/runtime_graph.h"
 #include "paddle/fluid/distributed/fleet_executor/task_node.h"
@@ -27,8 +28,6 @@
 namespace paddle {
 namespace distributed {
 
-std::unique_ptr<Carrier> FleetExecutor::carrier_;
-
 FleetExecutor::FleetExecutor(const std::string& exe_desc_str) {
   bool parse_flag = exe_desc_.ParseFromString(exe_desc_str);
   PADDLE_ENFORCE(parse_flag, platform::errors::PreconditionNotMet(
@@ -37,13 +36,9 @@ FleetExecutor::FleetExecutor(const std::string& exe_desc_str) {
 
 FleetExecutor::~FleetExecutor() {
   root_scope_->DropKids();
-  GetCarrier()->Release();
-}
-
-Carrier* FleetExecutor::GetCarrier() {
-  PADDLE_ENFORCE_NOT_NULL(carrier_.get(), platform::errors::NotFound(
-                                              "Carrier has not been created."));
-  return carrier_.get();
+  for (const auto& item : runtime_graph_->carrier_id_to_interceptor_ids()) {
+    GlobalMap<int64_t, Carrier>::Get(item.first)->Release();
+  }
 }
 
 void FleetExecutor::Init(
@@ -63,13 +58,19 @@ void FleetExecutor::Init(
   auto unused_vars = framework::GetUnusedVars(program_desc.Block(0), ops, {});
   runtime_graph_ = std::make_shared<RuntimeGraph>();
   std::unordered_map<int64_t, TaskNode*> interceptor_id_to_task;
+  std::unordered_map<int64_t, std::unordered_set<int64_t>>
+      carrier_id_to_interceptor_ids;
+  std::unordered_set<int64_t> interceptor_ids;
   for (auto task_node : task_nodes) {
     task_node->SetUnusedVars(unused_vars);
     int64_t interceptor_id = task_node->task_id();
     interceptor_id_to_task.emplace(interceptor_id, task_node);
+    interceptor_ids.insert(interceptor_id);
   }
+  carrier_id_to_interceptor_ids.emplace(0, interceptor_ids);
   runtime_graph_->SetInterceptorIdToRank(task_id_to_rank);
   runtime_graph_->SetInterceptorIdToNode(interceptor_id_to_task);
+  runtime_graph_->SetCarrierIdToInterceptorIds(carrier_id_to_interceptor_ids);
   for (auto& unique_op : ops) {
     unique_op.release();
   }
@@ -86,20 +87,25 @@ void FleetExecutor::Init(
   }
   VLOG(5) << runtime_graph_->DebugString();
   msg_bus_ = std::make_shared<MessageBus>();
-  CreateCarrier();
+  for (const auto& item : runtime_graph_->carrier_id_to_interceptor_ids()) {
+    GlobalMap<int64_t, Carrier>::Create(item.first, item.first);
+  }
   InitCarrier();
   InitMessageBus();
 
-  // refine this? wait all carrier ready
-  // NOTE(wangxi): must add after Carrier::SetMsgBus, for we use
-  // MessageBus::IncreaseBarrierCount when receive barrier msg.
-  GetCarrier()->Barrier();
+  // Wait for all message bus connected.
+  msg_bus_->Barrier();
 }
 
 void FleetExecutor::InitCarrier() {
-  if (!GetCarrier()->IsInit()) {
-    GetCarrier()->SetMsgBus(msg_bus_);
-    GetCarrier()->Init(exe_desc_.cur_rank(), runtime_graph_, root_scope_,
+  for (const auto& item : runtime_graph_->carrier_id_to_interceptor_ids()) {
+    Carrier* carrier = GlobalMap<int64_t, Carrier>::Get(item.first);
+    PADDLE_ENFORCE_NOT_NULL(carrier, platform::errors::InvalidArgument(
+                                         "Carrier has not been created."));
+    carrier->SetMsgBus(msg_bus_);
+    carrier->Init(exe_desc_.cur_rank(),
+                  runtime_graph_->interceptor_id_to_rank(), item.second,
+                  runtime_graph_->interceptor_id_to_node(), root_scope_,
                   minibatch_scope_, microbatch_scopes_, place_);
   }
 }
@@ -140,14 +146,9 @@ void FleetExecutor::InitMessageBus() {
 }
 
 void FleetExecutor::Run() {
-  // Run
-  PADDLE_ENFORCE_EQ(
-      GetCarrier()->IsInit(), true,
-      platform::errors::Unavailable("Carrier has not been init yet."));
-  PADDLE_ENFORCE_EQ(
-      msg_bus_->IsInit(), true,
-      platform::errors::Unavailable("MessageBus has not been init yet."));
-  GetCarrier()->Start();
+  for (const auto& item : runtime_graph_->carrier_id_to_interceptor_ids()) {
+    GlobalMap<int64_t, Carrier>::Get(item.first)->Start();
+  }
   for (auto* micro_scop : microbatch_scopes_) {
     // By default, we should delete all kid scopes after run executor because
     // some operators may create local scope when running, such as while_op.

paddle/fluid/distributed/fleet_executor/fleet_executor.h

@@ -42,16 +42,6 @@ class FleetExecutor final {
             const std::vector<TaskNode*>& task_nodes,
             const std::unordered_map<int64_t, int64_t>& task_id_to_rank);
   void Run();
-  // TODO(liyurui): Change to use registry table for multi-carrier.
-  static Carrier* GetCarrier();
-  template <typename... Args>
-  static Carrier* CreateCarrier(Args&&... args) {
-    PADDLE_ENFORCE_EQ(
-        carrier_.get(), nullptr,
-        platform::errors::AlreadyExists("Carrier has been created already."));
-    carrier_ = std::make_unique<Carrier>(std::forward<Args>(args)...);
-    return carrier_.get();
-  }
 
  private:
   DISABLE_COPY_AND_ASSIGN(FleetExecutor);
@@ -67,7 +57,6 @@ class FleetExecutor final {
   // The carriers under FleetExecutor will share message bus,
   // using shared_ptr to manage lifetime and condition race.
   std::shared_ptr<MessageBus> msg_bus_;
-  static std::unique_ptr<Carrier> carrier_;
 };
 
 }  // namespace distributed

paddle/fluid/distributed/fleet_executor/global_map.h

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+namespace paddle {
+namespace distributed {
+
+template <typename KeyT, typename ValueT>
+class GlobalMap final {
+ public:
+  static ValueT* Get(KeyT id) {
+    ValueT* item = GetPPtr(id)->get();
+    PADDLE_ENFORCE_NOT_NULL(
+        item, platform::errors::NotFound("This value is not in global map."));
+    return item;
+  }
+  template <typename... Args>
+  static ValueT* Create(KeyT id, Args&&... args) {
+    auto* ptr = GetPPtr(id);
+    PADDLE_ENFORCE_EQ(ptr->get(), nullptr,
+                      platform::errors::AlreadyExists(
+                          "This value has already in global map."));
+    ValueT* item = new ValueT(std::forward<Args>(args)...);
+    ptr->reset(item);
+    return item;
+  }
+
+ private:
+  static std::unique_ptr<ValueT>* GetPPtr(KeyT id) {
+    static std::mutex mutex;
+    static std::unordered_map<KeyT, std::unique_ptr<ValueT>> id_to_ptr;
+    std::unique_lock<std::mutex> lock(mutex);
+    return &id_to_ptr[id];
+  }
+};
+}  // namespace distributed
+}  // namespace paddle

paddle/fluid/distributed/fleet_executor/interceptor_message_service.cc

@@ -16,7 +16,7 @@
 #include "paddle/fluid/distributed/fleet_executor/interceptor_message_service.h"
 #include "brpc/server.h"
 #include "paddle/fluid/distributed/fleet_executor/carrier.h"
-#include "paddle/fluid/distributed/fleet_executor/fleet_executor.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
 
 namespace paddle {
 namespace distributed {
@@ -29,7 +29,15 @@ void InterceptorMessageServiceImpl::InterceptorMessageService(
   VLOG(3) << "Interceptor Message Service receives a message from interceptor "
           << request->src_id() << " to interceptor " << request->dst_id()
           << ", with the message: " << request->message_type();
-  bool flag = FleetExecutor::GetCarrier()->EnqueueInterceptorMessage(*request);
+  // TODO(liyurui): Remove this hard code.
+  int64_t carrier_id;
+  if (request->ctrl_message()) {
+    carrier_id = 0;
+  } else {
+    carrier_id = *GlobalMap<int64_t, int64_t>::Get(request->dst_id());
+  }
+  bool flag = GlobalMap<int64_t, Carrier>::Get(carrier_id)
+                  ->EnqueueInterceptorMessage(*request);
   response->set_rst(flag);
 }
 

paddle/fluid/distributed/fleet_executor/runtime_graph.h

@@ -35,6 +35,10 @@ class RuntimeGraph final {
   const std::unordered_map<int64_t, int64_t>& interceptor_id_to_rank() const {
     return interceptor_id_to_rank_;
   }
+  const std::unordered_map<int64_t, std::unordered_set<int64_t>>&
+  carrier_id_to_interceptor_ids() const {
+    return carrier_id_to_interceptor_ids_;
+  }
   void SetInterceptorIdToRank(
       const std::unordered_map<int64_t, int64_t>& interceptor_id_to_rank) {
     interceptor_id_to_rank_ = interceptor_id_to_rank;
@@ -43,12 +47,19 @@ class RuntimeGraph final {
       const std::unordered_map<int64_t, TaskNode*>& interceptor_id_to_node) {
     interceptor_id_to_node_ = interceptor_id_to_node;
   }
+  void SetCarrierIdToInterceptorIds(
+      const std::unordered_map<int64_t, std::unordered_set<int64_t>>&
+          carrier_id_to_interceptor_ids) {
+    carrier_id_to_interceptor_ids_ = carrier_id_to_interceptor_ids;
+  }
   std::string DebugString() const;
 
  private:
   DISABLE_COPY_AND_ASSIGN(RuntimeGraph);
   std::unordered_map<int64_t, TaskNode*> interceptor_id_to_node_;
   std::unordered_map<int64_t, int64_t> interceptor_id_to_rank_;
+  std::unordered_map<int64_t, std::unordered_set<int64_t>>
+      carrier_id_to_interceptor_ids_;
 };
 
 }  // namespace distributed

paddle/fluid/distributed/fleet_executor/test/CMakeLists.txt

@@ -13,6 +13,9 @@ cc_test(interceptor_pipeline_long_path_test SRCS interceptor_pipeline_long_path_
 set_source_files_properties(compute_interceptor_run_op_test.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
 cc_test(compute_interceptor_run_op_test SRCS compute_interceptor_run_op_test.cc DEPS fleet_executor ${BRPC_DEPS} op_registry fill_constant_op elementwise_add_op scope device_context)
 
+set_source_files_properties(interceptor_pass_the_parcel_test.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
+cc_test(interceptor_pass_the_parcel_test SRCS interceptor_pass_the_parcel_test.cc DEPS fleet_executor ${BRPC_DEPS})
+
 if(WITH_DISTRIBUTE AND WITH_PSCORE AND NOT (WITH_ASCEND OR WITH_ASCEND_CL))
 set_source_files_properties(interceptor_ping_pong_with_brpc_test.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
 cc_test(interceptor_ping_pong_with_brpc_test SRCS interceptor_ping_pong_with_brpc_test.cc DEPS fleet_executor ${BRPC_DEPS})

paddle/fluid/distributed/fleet_executor/test/compute_interceptor_run_op_test.cc

@@ -18,7 +18,7 @@ limitations under the License. */
 #include "gtest/gtest.h"
 
 #include "paddle/fluid/distributed/fleet_executor/carrier.h"
-#include "paddle/fluid/distributed/fleet_executor/fleet_executor.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
 #include "paddle/fluid/distributed/fleet_executor/interceptor.h"
 #include "paddle/fluid/distributed/fleet_executor/message_bus.h"
 #include "paddle/fluid/distributed/fleet_executor/task_node.h"
@@ -62,11 +62,12 @@ TEST(ComputeInterceptor, Compute) {
   std::vector<framework::Scope*> scopes = {scope, scope};
   platform::Place place = platform::CPUPlace();
 
-  Carrier carrier(0, {{0, 0}, {1, 0}});
+  Carrier* carrier = GlobalMap<int64_t, Carrier>::Create(0, 0);
+  carrier->Init(0, {{0, 0}, {1, 0}}, {0, 1});
 
   auto msg_bus = std::make_shared<MessageBus>();
   msg_bus->Init(0, {{0, "127.0.0.0:0"}}, "");
-  carrier.SetMsgBus(msg_bus);
+  carrier->SetMsgBus(msg_bus);
 
   // FIXME: don't delete, otherwise interceptor will use undefined node
   TaskNode* node_a =
@@ -77,9 +78,9 @@ TEST(ComputeInterceptor, Compute) {
   node_a->AddDownstreamTask(1);
   node_b->AddUpstreamTask(0);
 
-  auto* a = carrier.SetInterceptor(
+  auto* a = carrier->SetInterceptor(
       0, InterceptorFactory::Create("Compute", 0, node_a));
-  carrier.SetInterceptor(1, InterceptorFactory::Create("Compute", 1, node_b));
+  carrier->SetInterceptor(1, InterceptorFactory::Create("Compute", 1, node_b));
 
   a->SetPlace(place);
   a->SetMicroBatchScope(scopes);
@@ -89,10 +90,10 @@ TEST(ComputeInterceptor, Compute) {
   msg.set_message_type(DATA_IS_READY);
   msg.set_src_id(-1);
   msg.set_dst_id(0);
-  carrier.EnqueueInterceptorMessage(msg);
+  carrier->EnqueueInterceptorMessage(msg);
 
-  carrier.Wait();
-  carrier.Release();
+  carrier->Wait();
+  carrier->Release();
 }
 
 }  // namespace distributed

paddle/fluid/distributed/fleet_executor/test/compute_interceptor_test.cc

@@ -18,7 +18,7 @@ limitations under the License. */
 #include "gtest/gtest.h"
 
 #include "paddle/fluid/distributed/fleet_executor/carrier.h"
-#include "paddle/fluid/distributed/fleet_executor/fleet_executor.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
 #include "paddle/fluid/distributed/fleet_executor/interceptor.h"
 #include "paddle/fluid/distributed/fleet_executor/message_bus.h"
 #include "paddle/fluid/distributed/fleet_executor/task_node.h"
@@ -47,11 +47,12 @@ class StartInterceptor : public Interceptor {
 };
 
 TEST(ComputeInterceptor, Compute) {
-  Carrier carrier(0, {{0, 0}, {1, 0}, {2, 0}});
+  Carrier* carrier = GlobalMap<int64_t, Carrier>::Create(0, 0);
+  carrier->Init(0, {{0, 0}, {1, 0}, {2, 0}}, {0, 1, 2});
 
   auto msg_bus = std::make_shared<MessageBus>();
   msg_bus->Init(0, {{0, "127.0.0.0:0"}}, "");
-  carrier.SetMsgBus(msg_bus);
+  carrier->SetMsgBus(msg_bus);
 
   // NOTE: don't delete, otherwise interceptor will use undefined node
   TaskNode* node_a = new TaskNode(0, 0, 0, 3, 0);  // role, rank, task_id
@@ -65,9 +66,9 @@ TEST(ComputeInterceptor, Compute) {
   node_c->AddUpstreamTask(1);
 
   Interceptor* a =
-      carrier.SetInterceptor(0, std::make_unique<StartInterceptor>(0, node_a));
-  carrier.SetInterceptor(1, InterceptorFactory::Create("Compute", 1, node_b));
-  carrier.SetInterceptor(2, InterceptorFactory::Create("Compute", 2, node_c));
+      carrier->SetInterceptor(0, std::make_unique<StartInterceptor>(0, node_a));
+  carrier->SetInterceptor(1, InterceptorFactory::Create("Compute", 1, node_b));
+  carrier->SetInterceptor(2, InterceptorFactory::Create("Compute", 2, node_c));
 
   InterceptorMessage msg;
   msg.set_message_type(DATA_IS_READY);
@@ -76,8 +77,8 @@ TEST(ComputeInterceptor, Compute) {
   a->Send(1, msg);
   a->Send(1, msg);
 
-  carrier.Wait();
-  carrier.Release();
+  carrier->Wait();
+  carrier->Release();
 }
 
 }  // namespace distributed

paddle/fluid/distributed/fleet_executor/test/interceptor_pass_the_parcel_test.cc

+// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <iostream>
+#include <unordered_map>
+
+#include "gtest/gtest.h"
+
+#include "paddle/fluid/distributed/fleet_executor/carrier.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
+#include "paddle/fluid/distributed/fleet_executor/interceptor.h"
+#include "paddle/fluid/distributed/fleet_executor/message_bus.h"
+
+namespace paddle {
+namespace distributed {
+
+class ParcelInterceptor : public Interceptor {
+ public:
+  ParcelInterceptor(int64_t interceptor_id, TaskNode* node)
+      : Interceptor(interceptor_id, node) {
+    RegisterMsgHandle(
+        [this](const InterceptorMessage& msg) { PassParcel(msg); });
+  }
+
+  void PassParcel(const InterceptorMessage& msg) {
+    if (msg.message_type() == STOP) {
+      stop_ = true;
+      return;
+    }
+    std::cout << GetInterceptorId() << " recv msg, count=" << count_
+              << std::endl;
+    if (count_ == 5 && interceptor_id_ == 0) {
+      InterceptorMessage stop;
+      stop.set_message_type(STOP);
+      Send(0, stop);
+      Send(1, stop);
+      Send(2, stop);
+      Send(3, stop);
+      StopCarrier();
+      return;
+    }
+    ++count_;
+    InterceptorMessage new_msg;
+    if (msg.dst_id() == 3) {
+      Send(0, new_msg);
+    } else {
+      Send(msg.dst_id() + 1, new_msg);
+    }
+  }
+
+ private:
+  int count_{0};
+};
+
+REGISTER_INTERCEPTOR(Parcel, ParcelInterceptor);
+
+TEST(InterceptorTest, PassTheParcel) {
+  auto msg_bus = std::make_shared<MessageBus>();
+  Carrier* carrier_0 = GlobalMap<int64_t, Carrier>::Create(0, 0);
+  carrier_0->Init(0, {{0, 0}, {1, 0}, {2, 0}, {3, 0}}, {0});
+  carrier_0->SetMsgBus(msg_bus);
+  Carrier* carrier_1 = GlobalMap<int64_t, Carrier>::Create(1, 1);
+  carrier_1->Init(0, {{0, 0}, {1, 0}, {2, 0}, {3, 0}}, {1});
+  carrier_1->SetMsgBus(msg_bus);
+  Carrier* carrier_2 = GlobalMap<int64_t, Carrier>::Create(2, 2);
+  carrier_2->Init(0, {{0, 0}, {1, 0}, {2, 0}, {3, 0}}, {2});
+  carrier_2->SetMsgBus(msg_bus);
+  Carrier* carrier_3 = GlobalMap<int64_t, Carrier>::Create(3, 3);
+  carrier_3->Init(0, {{0, 0}, {1, 0}, {2, 0}, {3, 0}}, {3});
+  carrier_3->SetMsgBus(msg_bus);
+  msg_bus->Init(0, {{0, "127.0.0.0:0"}}, "");
+
+  Interceptor* a = carrier_0->SetInterceptor(
+      0, InterceptorFactory::Create("Parcel", 0, nullptr));
+
+  carrier_1->SetInterceptor(1,
+                            InterceptorFactory::Create("Parcel", 1, nullptr));
+  carrier_2->SetInterceptor(2,
+                            InterceptorFactory::Create("Parcel", 2, nullptr));
+  carrier_3->SetInterceptor(3,
+                            InterceptorFactory::Create("Parcel", 3, nullptr));
+
+  InterceptorMessage msg;
+  a->Send(1, msg);
+
+  carrier_0->Wait();
+}
+
+}  // namespace distributed
+}  // namespace paddle

paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_test.cc

@@ -18,6 +18,7 @@ limitations under the License. */
 #include "gtest/gtest.h"
 
 #include "paddle/fluid/distributed/fleet_executor/carrier.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
 #include "paddle/fluid/distributed/fleet_executor/interceptor.h"
 #include "paddle/fluid/distributed/fleet_executor/message_bus.h"
 
@@ -59,20 +60,21 @@ class PingPongInterceptor : public Interceptor {
 REGISTER_INTERCEPTOR(PingPong, PingPongInterceptor);
 
 TEST(InterceptorTest, PingPong) {
-  Carrier carrier(0, {{0, 0}, {1, 0}});
+  Carrier* carrier = GlobalMap<int64_t, Carrier>::Create(0, 0);
+  carrier->Init(0, {{0, 0}, {1, 0}}, {0, 1});
   auto msg_bus = std::make_shared<MessageBus>();
   msg_bus->Init(0, {{0, "127.0.0.0:0"}}, "");
-  carrier.SetMsgBus(msg_bus);
+  carrier->SetMsgBus(msg_bus);
 
-  Interceptor* a = carrier.SetInterceptor(
+  Interceptor* a = carrier->SetInterceptor(
       0, InterceptorFactory::Create("PingPong", 0, nullptr));
 
-  carrier.SetInterceptor(1, std::make_unique<PingPongInterceptor>(1, nullptr));
+  carrier->SetInterceptor(1, std::make_unique<PingPongInterceptor>(1, nullptr));
 
   InterceptorMessage msg;
   a->Send(1, msg);
 
-  carrier.Wait();
+  carrier->Wait();
 }
 
 }  // namespace distributed

paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_with_brpc_test.cc

@@ -20,7 +20,7 @@ limitations under the License. */
 #include "gtest/gtest.h"
 
 #include "paddle/fluid/distributed/fleet_executor/carrier.h"
-#include "paddle/fluid/distributed/fleet_executor/fleet_executor.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
 #include "paddle/fluid/distributed/fleet_executor/interceptor.h"
 #include "paddle/fluid/distributed/fleet_executor/message_bus.h"
 
@@ -107,42 +107,31 @@ TEST(InterceptorTest, PingPong) {
   std::unordered_map<int64_t, int64_t> interceptor_id_to_rank = {{0, 0},
                                                                  {1, 1}};
 
-  int exe_pid = fork();
-  if (exe_pid == 0) {
   int pid = fork();
   if (pid == 0) {
-      Carrier* carrier =
-          FleetExecutor::CreateCarrier(0, interceptor_id_to_rank);
+    Carrier* carrier = GlobalMap<int64_t, Carrier>::Create(0, 0);
     auto msg_bus = std::make_shared<MessageBus>();
     carrier->SetMsgBus(msg_bus);
     // NOTE: need Init msg_bus after carrier SetMsgBus
+    carrier->Init(0, interceptor_id_to_rank, {0});
     msg_bus->Init(0, {{0, ip0}, {1, ip1}}, ip0);
+    carrier->SetMsgBus(msg_bus);
     Interceptor* a = carrier->SetInterceptor(
         0, InterceptorFactory::Create("PingPong", 0, nullptr));
-      carrier->Barrier();
-
+    msg_bus->Barrier();
     InterceptorMessage msg;
     a->Send(1, msg);
     carrier->Wait();
   } else {
-      Carrier* carrier =
-          FleetExecutor::CreateCarrier(1, interceptor_id_to_rank);
+    Carrier* carrier = GlobalMap<int64_t, Carrier>::Create(0, 0);
     auto msg_bus = std::make_shared<MessageBus>();
     carrier->SetMsgBus(msg_bus);
+    carrier->Init(1, interceptor_id_to_rank, {1});
     msg_bus->Init(1, {{0, ip0}, {1, ip1}}, ip1);
-      carrier->SetInterceptor(
-          1, InterceptorFactory::Create("PingPong", 1, nullptr));
-      carrier->Barrier();
-
+    carrier->SetInterceptor(1,
+                            InterceptorFactory::Create("PingPong", 1, nullptr));
+    msg_bus->Barrier();
     carrier->Wait();
-      int status;
-      int ret = waitpid(pid, &status, 0);
-      CHECK_EQ(ret, pid);
-    }
-  } else {
-    int status;
-    int ret = waitpid(exe_pid, &status, 0);
-    CHECK_EQ(ret, exe_pid);
   }
 }
 

paddle/fluid/distributed/fleet_executor/test/interceptor_pipeline_long_path_test.cc

@@ -18,6 +18,7 @@ limitations under the License. */
 #include "gtest/gtest.h"
 
 #include "paddle/fluid/distributed/fleet_executor/carrier.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
 #include "paddle/fluid/distributed/fleet_executor/interceptor.h"
 #include "paddle/fluid/distributed/fleet_executor/message_bus.h"
 #include "paddle/fluid/distributed/fleet_executor/task_node.h"
@@ -51,10 +52,12 @@ void LinkNodes(const std::vector<TaskNode*>& nodes) {
 }
 
 TEST(AmplifierInterceptor, Amplifier) {
-  Carrier carrier(0, {{0, 0}, {1, 0}, {2, 0}, {3, 0}, {4, 0}, {5, 0}});
+  Carrier* carrier = GlobalMap<int64_t, Carrier>::Create(0, 0);
+  carrier->Init(0, {{0, 0}, {1, 0}, {2, 0}, {3, 0}, {4, 0}, {5, 0}},
+                {0, 1, 2, 3, 4, 5});
   auto msg_bus = std::make_shared<MessageBus>();
   msg_bus->Init(0, {{0, "127.0.0.0:0"}}, "127.0.0.0:0");
-  carrier.SetMsgBus(msg_bus);
+  carrier->SetMsgBus(msg_bus);
 
   int64_t micro_steps = 3;
 
@@ -73,21 +76,23 @@ TEST(AmplifierInterceptor, Amplifier) {
   node_b->SetReplyUpPerSteps(micro_steps);
   node_e->SetSendDownPerSteps(micro_steps);
 
-  carrier.SetInterceptor(0, InterceptorFactory::Create("Compute", 0, node_a));
-  carrier.SetInterceptor(1, InterceptorFactory::Create("Amplifier", 1, node_b));
-  carrier.SetInterceptor(2, InterceptorFactory::Create("Compute", 2, node_c));
-  carrier.SetInterceptor(3, InterceptorFactory::Create("Compute", 3, node_d));
-  carrier.SetInterceptor(4, InterceptorFactory::Create("Amplifier", 4, node_e));
-  carrier.SetInterceptor(5, InterceptorFactory::Create("Compute", 5, node_f));
+  carrier->SetInterceptor(0, InterceptorFactory::Create("Compute", 0, node_a));
+  carrier->SetInterceptor(1,
+                          InterceptorFactory::Create("Amplifier", 1, node_b));
+  carrier->SetInterceptor(2, InterceptorFactory::Create("Compute", 2, node_c));
+  carrier->SetInterceptor(3, InterceptorFactory::Create("Compute", 3, node_d));
+  carrier->SetInterceptor(4,
+                          InterceptorFactory::Create("Amplifier", 4, node_e));
+  carrier->SetInterceptor(5, InterceptorFactory::Create("Compute", 5, node_f));
 
   // start
   InterceptorMessage msg;
   msg.set_message_type(DATA_IS_READY);
   msg.set_src_id(-1);
   msg.set_dst_id(0);
-  carrier.EnqueueInterceptorMessage(msg);
-  carrier.Wait();
-  carrier.Release();
+  carrier->EnqueueInterceptorMessage(msg);
+  carrier->Wait();
+  carrier->Release();
 }
 
 }  // namespace distributed

paddle/fluid/distributed/fleet_executor/test/interceptor_pipeline_short_path_test.cc

@@ -18,6 +18,7 @@ limitations under the License. */
 #include "gtest/gtest.h"
 
 #include "paddle/fluid/distributed/fleet_executor/carrier.h"
+#include "paddle/fluid/distributed/fleet_executor/global_map.h"
 #include "paddle/fluid/distributed/fleet_executor/interceptor.h"
 #include "paddle/fluid/distributed/fleet_executor/message_bus.h"
 #include "paddle/fluid/distributed/fleet_executor/task_node.h"
@@ -69,10 +70,11 @@ void LinkNodes(const std::vector<TaskNode*>& nodes,
 }
 
 TEST(AmplifierInterceptor, Amplifier) {
-  Carrier carrier(0, {{0, 0}, {1, 0}, {2, 0}, {3, 0}});
+  Carrier* carrier = GlobalMap<int64_t, Carrier>::Create(0, 0);
+  carrier->Init(0, {{0, 0}, {1, 0}, {2, 0}, {3, 0}}, {0, 1, 2, 3});
   auto msg_bus = std::make_shared<MessageBus>();
   msg_bus->Init(0, {{0, ""}}, "");
-  carrier.SetMsgBus(msg_bus);
+  carrier->SetMsgBus(msg_bus);
 
   int64_t micro_steps = 6;
 
@@ -91,19 +93,21 @@ TEST(AmplifierInterceptor, Amplifier) {
   node_d->SetRunPerSteps(micro_steps);
   node_d->SetRunAtOffset(micro_steps - 1);
 
-  carrier.SetInterceptor(0, InterceptorFactory::Create("Amplifier", 0, node_a));
-  carrier.SetInterceptor(1, InterceptorFactory::Create("Compute", 1, node_b));
-  carrier.SetInterceptor(2, InterceptorFactory::Create("Compute", 2, node_c));
-  carrier.SetInterceptor(3, InterceptorFactory::Create("Amplifier", 3, node_d));
+  carrier->SetInterceptor(0,
+                          InterceptorFactory::Create("Amplifier", 0, node_a));
+  carrier->SetInterceptor(1, InterceptorFactory::Create("Compute", 1, node_b));
+  carrier->SetInterceptor(2, InterceptorFactory::Create("Compute", 2, node_c));
+  carrier->SetInterceptor(3,
+                          InterceptorFactory::Create("Amplifier", 3, node_d));
 
   // start
   InterceptorMessage msg;
   msg.set_message_type(DATA_IS_READY);
   msg.set_src_id(-1);
   msg.set_dst_id(0);
-  carrier.EnqueueInterceptorMessage(msg);
-  carrier.Wait();
-  carrier.Release();
+  carrier->EnqueueInterceptorMessage(msg);
+  carrier->Wait();
+  carrier->Release();
 }
 
 }  // namespace distributed