add support for global pooling for trt

Author: NHZlX

paddle/fluid/inference/tensorrt/convert/pool2d_op.cc

@@ -33,6 +33,7 @@ class Pool2dOpConverter : public OpConverter {
     PADDLE_ENFORCE_EQ(op_desc.Output("Out").size(), 1);
     auto* input1 = engine_->GetITensor(op_desc.Input("X")[0]);
 
+    bool global_pooling = boost::get<bool>(op_desc.GetAttr("global_pooling"));
     std::string pool_type =
         boost::get<std::string>(op_desc.GetAttr("pooling_type"));
     std::vector<int> ksize =
@@ -42,7 +43,13 @@ class Pool2dOpConverter : public OpConverter {
     std::vector<int> paddings =
         boost::get<std::vector<int>>(op_desc.GetAttr("paddings"));
 
-    const nvinfer1::DimsHW nv_ksize(ksize[0], ksize[1]);
+    nvinfer1::DimsHW nv_ksize(ksize[0], ksize[1]);
+    if (global_pooling == true) {
+      nvinfer1::Dims input_shape = input1->getDimensions();
+      int nbDims = input_shape.nbDims;
+      nv_ksize.d[0] = input_shape.d[nbDims - 2];
+      nv_ksize.d[1] = input_shape.d[nbDims - 1];
+    }
     const nvinfer1::DimsHW nv_strides(strides[0], strides[1]);
     const nvinfer1::DimsHW nv_paddings(paddings[0], paddings[1]);
 

paddle/fluid/inference/tensorrt/convert/test_pool2d_op.cc

@@ -40,11 +40,13 @@ TEST(Pool2dOpConverter, main) {
   std::vector<int> strides({2, 2});
   std::vector<int> paddings({0, 0});
   std::string pooling_t = "max";
+  bool global_pooling = false;
 
   desc.SetAttr("pooling_type", pooling_t);
   desc.SetAttr("ksize", ksize);
   desc.SetAttr("strides", strides);
   desc.SetAttr("paddings", paddings);
+  desc.SetAttr("global_pooling", global_pooling);
 
   LOG(INFO) << "set OP";
   validator.SetOp(*desc.Proto());