Refine INT8 conv compute

paddle/fluid/lite/api/cxx_api_bin_int8.cc

@@ -34,6 +34,7 @@ double time_diff(Time t1, Time t2) {
 void Run(const char* model_dir, int repeat) {
 #ifdef LITE_WITH_ARM
   DeviceInfo::Init();
+  DeviceInfo::Global().SetRunMode(LITE_POWER_HIGH, 1);
 #endif
   lite::Predictor predictor;
   std::vector<Place> valid_places({
@@ -52,6 +53,7 @@ void Run(const char* model_dir, int repeat) {
     data[i] = 1;
   }
 
+  for (int i = 0; i < 10; i++) predictor.Run();
   auto time1 = time();
   for (int i = 0; i < repeat; i++) predictor.Run();
   auto time2 = time();
@@ -60,10 +62,16 @@ void Run(const char* model_dir, int repeat) {
 
   auto* out = predictor.GetOutput(0);
   LOG(INFO) << out << " memory size " << out->data_size();
-  LOG(INFO) << "out " << out->data<float>()[0];
-  LOG(INFO) << "out " << out->data<float>()[1];
   LOG(INFO) << "dims " << out->dims();
   LOG(INFO) << "out data size: " << out->data_size();
+  /*
+  float sum = 0.;
+  for (int i = 0; i < out->data_size(); i++) {
+     LOG(INFO) << "out " << out->data<float>()[i];
+     sum += out->data<float>()[i];
+  }
+  LOG(INFO) << sum;
+  */
 }
 
 }  // namespace lite

paddle/fluid/lite/kernels/arm/conv_compute.cc

@@ -74,7 +74,7 @@ void ConvCompute::PrepareForRun() {
   } else if (param.groups == 1 && kw == 3 && stride == 2 && kps_equal &&
              no_dilation) {
     // direct conv impl
-    impl_ = new lite::arm::math::DirectConv<PRECISION(kFloat)>;
+    impl_ = new lite::arm::math::GemmLikeConv<PRECISION(kFloat)>;
     VLOG(3) << "invoking direct conv";
   } else {
     impl_ = new lite::arm::math::GemmLikeConv<PRECISION(kFloat)>;
@@ -123,8 +123,7 @@ void ConvComputeInt8<Ptype_out>::PrepareForRun() {
 
   // weigth is int8 and bias is int32 so do not need trans
   if (param.groups == ic && ic == oc && kps_equal && no_dilation && flag_dw) {
-    // impl_ = new lite::arm::math::DepthwiseConvInt8<Ptype_out>;
-    impl_ = new lite::arm::math::GemmLikeConvInt8<Ptype_out>;
+    impl_ = new lite::arm::math::DepthwiseConvInt8<Ptype_out>;
     VLOG(3) << "Run DepthwiseConv Int8";
   } else if (param.groups == 1 && kw == 3 && (sw == 1 || sw == 2) &&
              kps_equal && no_dilation) {