[fleet_executor] Parse rank_to_ip map on cpp side and start message bus.

paddle/fluid/distributed/fleet_executor/CMakeLists.txt

@@ -19,6 +19,7 @@ if(WITH_DISTRIBUTE)
   set_source_files_properties(interceptor.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(message_bus.h PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(message_bus.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
+  set_source_files_properties(fleet_executor.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(carrier.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(interceptor_message_service.h PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(interceptor_message_service.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})

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/message_bus.h"
 #include "paddle/fluid/distributed/fleet_executor/runtime_graph.h"
 #include "paddle/fluid/framework/program_desc.h"
 
@@ -31,6 +32,40 @@ FleetExecutor::~FleetExecutor() {
 
 void FleetExecutor::Init(const paddle::framework::ProgramDesc& program_desc) {
   // Compile and Initialize
+  InitMessageBus();
+}
+
+void FleetExecutor::InitMessageBus() {
+  std::stringstream ss;
+  ss << "\nThe DNS table of the message bus is: \n";
+  int64_t cur_rank = exe_desc_.cur_rank();
+  std::unordered_map<int64_t, int64_t> interceptor_id_to_rank;
+  std::unordered_map<int64_t, std::string> rank_to_addr;
+  std::string addr;
+  for (const auto& rank_info : exe_desc_.cluster_info()) {
+    int64_t rank = rank_info.rank();
+    std::string ip_port = rank_info.ip_port();
+    ss << rank << "\t->\t" << ip_port << "\n";
+    // TODO(Yuang): replace the first 'rank' with real interceptor id
+    interceptor_id_to_rank.insert(std::make_pair(rank, rank));
+    rank_to_addr.insert(std::make_pair(rank, ip_port));
+    if (rank == cur_rank) {
+      addr = ip_port;
+    }
+  }
+  PADDLE_ENFORCE_NE(
+      addr, "",
+      platform::errors::NotFound(
+          "Current rank is %s, which ip_port cannot be found in the config.",
+          cur_rank));
+  VLOG(3) << "Current rank is " << cur_rank << " and the ip_port is " << addr
+          << ".";
+  VLOG(3) << "The number of ranks are " << interceptor_id_to_rank.size() << ".";
+  VLOG(5) << ss.str();
+  MessageBus& message_bus_instance = MessageBus::Instance();
+  if (!message_bus_instance.IsInit()) {
+    message_bus_instance.Init(interceptor_id_to_rank, rank_to_addr, addr);
+  }
 }
 
 void FleetExecutor::Run() {

paddle/fluid/distributed/fleet_executor/fleet_executor.h

@@ -42,6 +42,7 @@ class FleetExecutor final {
   DISABLE_COPY_AND_ASSIGN(FleetExecutor);
   FleetExecutorDesc exe_desc_;
   std::unique_ptr<RuntimeGraph> runtime_graph_;
+  void InitMessageBus();
   static std::shared_ptr<Carrier> global_carrier_;
 };
 

paddle/fluid/distributed/fleet_executor/message_bus.cc

@@ -42,7 +42,10 @@ void MessageBus::Init(
   });
 }
 
+bool MessageBus::IsInit() const { return is_init_; }
+
 void MessageBus::Release() {
+  VLOG(3) << "Message bus releases resource.";
 #if defined(PADDLE_WITH_DISTRIBUTE) && defined(PADDLE_WITH_PSCORE) && \
     !defined(PADDLE_WITH_ASCEND_CL)
   server_.Stop(1000);

paddle/fluid/distributed/fleet_executor/message_bus.h

@@ -48,6 +48,8 @@ class MessageBus final {
             const std::unordered_map<int64_t, std::string>& rank_to_addr,
             const std::string& addr);
 
+  bool IsInit() const;
+
   void Release();
 
   // called by Interceptor, send InterceptorMessage to dst