wip for testing

paddle/operators/detail/recv_impl.cc

@@ -21,16 +21,20 @@ namespace detail {
 Status SendRecvServerImpl::SendVariable(ServerContext *context,
                                         const VariableMessage *in_var,
                                         VariableMessage *out_var) {
-  framework::LoDTensor t;
-  // TODO(typhoonzero): desirealize in_tensor and run pserver network.
+  // TODO(typhoonzero): support different variable types.
   std::istringstream iss(in_var->serialized());
+  framework::LoDTensor t;
   framework::DeserializeFromStream(iss, &t);
-  lodtensor_queue_.Push(std::move(t));
+  TensorWithName tensor_with_name =
+      std::make_pair(in_var->varname(), std::move(t));
+
+  var_recv_queue_.Push(std::move(tensor_with_name));
   // Block util the sub graph is done.
-  t = lodtensor_return_queue_.Pop();
+  auto out_tensor_with_name = var_return_queue_.Pop();
   std::ostringstream oss;
-  // FIXME(typhoonzero): get context from op.
-  framework::SerializeToStream(oss, t, platform::CPUDeviceContext());
+  framework::SerializeToStream(oss, out_tensor_with_name.second,
+                               platform::CPUDeviceContext());
+
   std::string *varname = out_var->mutable_varname();
   *varname = in_var->varname();
   std::string *serialized = out_var->mutable_serialized();

paddle/operators/detail/send_recv.proto

@@ -19,6 +19,7 @@ package sendrecv;
 service SendRecvService {
   // For parameter server round-robin like hashing, do not split tensors.
   // Send and recv only one tensor
+  // TODO(typhoonzero): add streaming API
   rpc SendVariable(VariableMessage) returns (VariableMessage) {}
 }
 

paddle/operators/detail/send_recv_impl.h

@@ -48,6 +48,8 @@ namespace paddle {
 namespace operators {
 namespace detail {
 
+typedef std::pair<std::string, framework::LoDTensor> TensorWithName;
+
 class SendRecvServerImpl final : public SendRecvService::Service {
  public:
   explicit SendRecvServerImpl() {}
@@ -55,17 +57,15 @@ class SendRecvServerImpl final : public SendRecvService::Service {
   Status SendVariable(ServerContext *context, const VariableMessage *in_var,
                       VariableMessage *out_var) override;
 
-  const framework::LoDTensor Get() { return this->lodtensor_queue_.Pop(); }
+  const TensorWithName Get() { return this->var_recv_queue_.Pop(); }
 
-  void Push(const framework::LoDTensor &tensor) {
-    this->lodtensor_return_queue_.Push(tensor);
-  }
+  void Push(const TensorWithName &var) { this->var_return_queue_.Push(var); }
 
  private:
-  SimpleBlockQueue<framework::LoDTensor> lodtensor_queue_;
-  SimpleBlockQueue<framework::LoDTensor> lodtensor_return_queue_;
-  SimpleBlockQueue<framework::SelectedRows> selected_rows_queue_;
-  SimpleBlockQueue<framework::SelectedRows> selected_rows_return_queue_;
+  // received variable from RPC, operators fetch variable from this queue.
+  SimpleBlockQueue<TensorWithName> var_recv_queue_;
+  // calculated variable should push to this queue.
+  SimpleBlockQueue<TensorWithName> var_return_queue_;
 };
 
 // RPCClient is a class to send tensors to pserver sub-network

paddle/operators/recv_op.cc

@@ -14,6 +14,7 @@
 
 #include <stdint.h>
 #include <sys/stat.h>
+#include <iostream>
 #include <ostream>
 #include <thread>
 
@@ -63,14 +64,32 @@ class RecvOp : public framework::OperatorBase {
 
   void Run(const framework::Scope &scope,
            const platform::DeviceContext &dev_ctx) const override {
-    // blocking get one var from client.
-    const framework::LoDTensor &t = rpc_service_->Get();
     framework::Scope &recv_scope = scope.NewScope();
+    // blocking get one var from client.
+    const detail::TensorWithName &v = rpc_service_->Get();
+    auto grad_var_name = v.first;
+
+    // framework::Scope &recv_scope = scope.NewScope();
+    auto param_list = Attr<std::vector<std::string>>("ParamList");
+    auto grad_list = Attr<std::vector<std::string>>("GradList");
+    auto it = std::find(grad_list.begin(), grad_list.end(), grad_var_name);
+    std::string param_var_name;
+    if (it != grad_list.end()) {
+      param_var_name = param_list[it - grad_list.begin()];
+    }
     // set graph input var
-    auto *var = recv_scope.Var(Input("RX"));
+    auto input_grad = Input("RX");
+
+    // FIXME(typhoonzero): Find the parameter name from input grad name
+    // rename X  -> Param
+    // rename RX -> Grad
+    auto *var = recv_scope.FindVar(input_grad);
     auto *tensor = var->GetMutable<framework::LoDTensor>();
+    recv_scope.Rename(param_var_name, "Param");
+    recv_scope.Rename("RX", "Grad");
+
     // FIXME(typhoonzero): do not copy
-    framework::CopyFrom(t, dev_ctx.GetPlace(), dev_ctx, tensor);
+    framework::CopyFrom(v.second, dev_ctx.GetPlace(), dev_ctx, tensor);
 
     std::string program_str = Attr<std::string>("OptimizeProgram");
     framework::ProgramDesc program_desc;
@@ -81,9 +100,14 @@ class RecvOp : public framework::OperatorBase {
     executor.Run(program, &recv_scope, 0, /*global_block*/
                  false /*create_local_scope*/);
 
-    auto *out_var = recv_scope.FindVar("Out");
-    // push back
-    rpc_service_->Push(out_var->Get<framework::LoDTensor>());
+    auto *out_var = recv_scope.FindVar("Param");
+    detail::TensorWithName out;
+    out.first = param_var_name;
+    out.second = out_var->Get<framework::LoDTensor>();
+    rpc_service_->Push(out);
+    // rename back the params
+    recv_scope.Rename("Param", param_var_name);
+    recv_scope.Rename("Grad", "RX");
   }
 
  protected:
@@ -93,13 +117,14 @@ class RecvOp : public framework::OperatorBase {
   // grpc send/recv service implement to register.
   std::shared_ptr<detail::SendRecvServerImpl> rpc_service_;
   std::shared_ptr<std::thread> server_thread_;
+  framework::Scope const *recv_scope_{nullptr};
 };
 
 class RecvOpMaker : public framework::OpProtoAndCheckerMaker {
  public:
   RecvOpMaker(framework::OpProto *proto, framework::OpAttrChecker *op_checker)
       : OpProtoAndCheckerMaker(proto, op_checker) {
-    AddInput("RX", "(Tensor) Input tensor to be saved");
+    AddInput("RX", "(Tensor) Input tensor to be optimized").AsDuplicable();
     AddComment(R"DOC(
 Recv operator
 
@@ -112,6 +137,12 @@ This operator will recv tensor from send_op
         .AddCustomChecker([](const std::string &ip) { return !ip.empty(); });
     AddAttr<std::string>("OptimizeProgram", "type string",
                          "Serialized ProgramDesc string for recv to run.");
+    AddAttr<std::vector<std::string>>(
+        "ParamList", "type list of string",
+        "grad->param name mapping to find which param to optimize.");
+    AddAttr<std::vector<std::string>>(
+        "GradList", "type list of string",
+        "grad->param name mapping to find which param to optimize.");
   }
 };
 

python/paddle/v2/fluid/executor.py

 import numpy as np
 from . import core
-from framework import Program, default_main_program
+from framework import Program, default_main_program, Parameter, Variable
 import distribute_planner
 
 __all__ = ['Executor', 'g_scope']
@@ -91,7 +91,7 @@ class Executor(object):
             # FIXME(typhoonzero): send to different servers can run in parrallel.
             send_op = program.global_block().append_op(
                 type="send",
-                inputs={"X": self.param_grad_map[ep]["params"]
+                inputs={"X": self.param_grad_map[ep]["grads"]
                         },  # inputs is a list of tensors to be send
                 outputs={},
                 attrs={"endpoint": ep})
@@ -102,9 +102,20 @@ class Executor(object):
 
     def get_pserver_program(self, endpoint):
         pserver_program = Program()
-
-        for param in self.param_grad_map[endpoint]["params"]:
-            pserver_program.global_block().create_parameter(**param.__dict__)
+        for v in self.param_grad_map[endpoint]["params"]:
+            assert isinstance(v, Parameter)
+            new_p = Parameter(
+                block=pserver_program.global_block(),
+                shape=v.shape,
+                dtype=v.dtype,
+                type=v.type,
+                lod_level=v.lod_level,
+                stop_gradient=v.stop_gradient,
+                trainable=v.trainable,
+                optimize_attr=v.optimize_attr,
+                regularizer=v.regularizer,
+                name=v.name)
+            pserver_program.global_block().vars[new_p.name] = new_p
 
         pserver_program.global_block().append_op(
             type="recv",
@@ -112,12 +123,12 @@ class Executor(object):
                     self.param_grad_map[endpoint]["grads"]},  # grads to recv
             outputs={},
             attrs={
-                "OptimizeProgram": self.optimize_sub_program.to_string(),
-                "endpoint": endpoint
+                "OptimizeProgram": self.optimize_sub_program.to_string(True),
+                "endpoint": endpoint,
+                "ParamList": self.param_grad_map[endpoint]["params"],
+                "GradList": self.param_grad_map[endpoint]["grads"]
             })
-
-    def get_trainer_program(self):
-        return default_main_program()
+        return pserver_program
 
     def aslodtensor(self, data):
         def accumulate(data):

python/paddle/v2/fluid/tests/book/test_recognize_digits_conv_dist.py

@@ -45,6 +45,7 @@ pserver_endpoint = os.getenv("PSERVER")
 if pserver_endpoint:
     pserver_prog = exe.get_pserver_program(pserver_endpoint)
     exe.run(fluid.default_startup_program())
+    while True:
         exe.run(pserver_prog)
 else:
     feeder = fluid.DataFeeder(feed_list=[images, label], place=place)