Updating the comments for send_op and recv_op. (#7747)

* Updating the cluster trainign doc

* Fixed comments

* Updating few comments in recv_op

paddle/operators/recv_op.cc

@@ -49,7 +49,7 @@ static void CreateTensorFromMessageType(framework::Variable *var,
     var->GetMutable<framework::SelectedRows>();
   } else {
     PADDLE_THROW(
-        "VraibleMessage type %d is not in "
+        "VariableMessage type %d is not in "
         "[LoDTensor, SelectedRows]",
         var_type);
   }
@@ -121,17 +121,17 @@ class RecvOp : public framework::OperatorBase {
         if (it != grad_list.end()) {
           param_var_name = param_list[it - grad_list.begin()];
         } else {
-          LOG(ERROR) << "grad have no paired param:" << grad_var_name;
+          LOG(ERROR) << "grad has no paired param:" << grad_var_name;
         }
-        VLOG(3) << "recved grad: " << grad_var_name
+        VLOG(3) << "received grad: " << grad_var_name
                 << " updating param: " << param_var_name;
         if (fan_in > 1) {
           grad_var_name = this->GetGradVarNameForTrainer(grad_var_name);
         }
         auto *var = recv_scope.FindVar(grad_var_name);
         if (var == nullptr) {
-          LOG(ERROR) << "can not find server side var: " << grad_var_name;
-          PADDLE_THROW("can not find server side var");
+          LOG(ERROR) << "Can not find server side var: " << grad_var_name;
+          PADDLE_THROW("Can not find server side var");
         }
         detail::DeserializeFromMessage(v.second, dev_ctx, var);
       }
@@ -165,7 +165,7 @@ class RecvOpMaker : public framework::OpProtoAndCheckerMaker {
     AddComment(R"DOC(
 Recv operator
 
-This operator will recv tensor from send_op
+This operator will recieve tensor from send_op
 )DOC");
     AddAttr<std::string>("endpoint",
                          "(string, default 127.0.0.1:6164)"
@@ -176,11 +176,11 @@ This operator will recv tensor from send_op
         kOptimizeBlock, "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.")
+        "grad->param name mapping to find which parameters to optimize.")
         .SetDefault({});
     AddAttr<std::vector<std::string>>(
         "GradList", "type list of string",
-        "grad->param name mapping to find which param to optimize.")
+        "grad->param name mapping to find which parameters to optimize.")
         .SetDefault({});
     AddAttr<int>("Fanin", "type int",
                  "Number of trainers in the current cluster job")

paddle/operators/send_op.cc

@@ -62,13 +62,13 @@ class SendOpMaker : public framework::OpProtoAndCheckerMaker {
  public:
   SendOpMaker(OpProto* proto, OpAttrChecker* op_checker)
       : OpProtoAndCheckerMaker(proto, op_checker) {
-    AddInput("X", "(Tensor) Input tensor to be send").AsDuplicable();
-    AddOutput("Out", "(Tensor) Output tensor to get from server")
+    AddInput("X", "(Tensor) Input tensor to be sent").AsDuplicable();
+    AddOutput("Out", "(Tensor) Output tensor to be received from server")
         .AsDuplicable();
     AddComment(R"DOC(
 Send operator
 
-This operator will send tensor to recv_op.
+This operator will send tensor to recv_op at the parameter server.
 )DOC");
     AddAttr<std::vector<std::string>>("endpoints",
                                       "(string vector, default 127.0.0.1:6164)"