[DeepRec] Set graph signature to speed up getting executor in session. (#18)

Author: shanshanpt

WORKSPACE

@@ -11,8 +11,8 @@ load("//tensorflow_serving:repo.bzl", "tensorflow_http_archive")
 
 tensorflow_http_archive(
     name = "org_tensorflow",
-    sha256 = "836a1a5425a4f853abfe1dd03e2222bb9004540163fc2c56d57979b390cd5a31",
-    git_commit = "c3a656197cae9647fad47ec7d84ccd722a502815",
+    sha256 = "34662c11d52bf5314b62203daa17cdf03dfaaa51492096b5c230e808282e6814",
+    git_commit = "5f165904121f9d4c5e9c6ac4363ad2edd70f6cfc",
 )
 
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

tensorflow_serving/servables/tensorflow/predict_util.cc

@@ -212,6 +212,13 @@ Status RunPredict(
   bool trace_timeline = Tracer::GetTracer()->NeedTracing();
   std::vector<Tensor> outputs;
   RunMetadata run_metadata;
+  // set running graph signature
+  *run_metadata.mutable_graph_signature() =
+      signature_name + request.model_spec().name();
+  if (servable_version) {
+    *run_metadata.mutable_graph_signature() +=
+        std::to_string(*servable_version);
+  }
   if (likely(!trace_timeline)) {
     TF_RETURN_IF_ERROR(session->Run(run_options, input_tensors,
                                     output_tensor_names, {}, &outputs,