diff --git a/mace_run.cc b/mace_run.cc
index 87b7b5b4ca9ffdcc25b53fa4a053538bcc45f509..5576b1a64891e4d2585a9ae364173a99646d618a 100644
--- a/mace_run.cc
+++ b/mace_run.cc
@@ -11,6 +11,7 @@
  *          --output_shape=1,224,224,2   \
  *          --input_file=input_data \
  *          --output_file=mace.out  \
+ *          --model_data_file=model_data.data \
  *          --device=OPENCL
  */
 #include <cstdlib>
@@ -31,7 +32,11 @@ using namespace mace;
 namespace mace {
 namespace MACE_MODEL_TAG {
 
-extern NetDef CreateNet();
+extern unsigned char *LoadModelData(const char *model_data_file);
+
+extern void UnloadModelData(unsigned char *model_data);
+
+extern NetDef CreateNet(const unsigned char *model_data);
 
 extern const std::string ModelChecksum();
 
@@ -133,6 +138,7 @@ DEFINE_string(input_shape, "1,224,224,3", "input shape, separated by comma");
 DEFINE_string(output_shape, "1,224,224,2", "output shape, separated by comma");
 DEFINE_string(input_file, "", "input file name");
 DEFINE_string(output_file, "", "output file name");
+DEFINE_string(model_data_file, "", "model data file name, used when EMBED_MODEL_DATA set to 0");
 DEFINE_string(device, "OPENCL", "CPU/NEON/OPENCL/HEXAGON");
 DEFINE_int32(round, 1, "round");
 DEFINE_int32(malloc_check_cycle, -1, "malloc debug check cycle, -1 to disable");
@@ -148,6 +154,7 @@ int main(int argc, char **argv) {
             << "output_shape: " << FLAGS_output_shape << std::endl
             << "input_file: " << FLAGS_input_file << std::endl
             << "output_file: " << FLAGS_output_file << std::endl
+            << "model_data_file: " << FLAGS_model_data_file << std::endl
             << "device: " << FLAGS_device << std::endl
             << "round: " << FLAGS_round << std::endl;
 
@@ -158,7 +165,8 @@ int main(int argc, char **argv) {
 
   // load model
   int64_t t0 = NowMicros();
-  NetDef net_def = mace::MACE_MODEL_TAG::CreateNet();
+  unsigned char *model_data = mace::MACE_MODEL_TAG::LoadModelData(FLAGS_model_data_file.c_str());
+  NetDef net_def = mace::MACE_MODEL_TAG::CreateNet(model_data);
   int64_t t1 = NowMicros();
   std::cout << "CreateNetDef duration: " << t1 - t0 << " us" << std::endl;
   int64_t init_micros = t1 - t0;
@@ -187,6 +195,9 @@ int main(int argc, char **argv) {
   std::cout << "Run init" << std::endl;
   t0 = NowMicros();
   mace::MaceEngine engine(&net_def, device_type);
+  if (device_type == DeviceType::OPENCL || device_type == DeviceType::HEXAGON) {
+    mace::MACE_MODEL_TAG::UnloadModelData(model_data);
+  }
   t1 = NowMicros();
   init_micros += t1 - t0;
   std::cout << "Net init duration: " << t1 - t0 << " us" << std::endl;