// Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "paddle/fluid/inference/api/analysis_predictor.h"
#include "paddle/fluid/inference/api/resource_manager.h"
#if defined(PADDLE_WITH_CUDA)
#include <cuda_runtime.h>
#endif
#include <glog/logging.h>
#include <gtest/gtest.h>

#include <thread>  // NOLINT

#include "paddle/fluid/framework/ir/pass.h"
#include "paddle/fluid/framework/tensor.h"
#include "paddle/fluid/inference/api/helper.h"
#include "paddle/fluid/inference/api/paddle_api.h"
#include "paddle/fluid/inference/api/paddle_inference_api.h"
#include "paddle/fluid/inference/tests/api/tester_helper.h"
#include "paddle/fluid/inference/utils/io_utils.h"
#include "paddle/fluid/platform/cpu_info.h"

DEFINE_string(dirname, "", "dirname to tests.");

namespace paddle {

TEST(AnalysisPredictor, analysis_off) {
  AnalysisConfig config;
  config.SetModel(FLAGS_dirname);
  config.SwitchIrOptim(false);
  LOG(INFO) << config.Summary();
  LOG(INFO) << "Shape Info collected: " << config.shape_range_info_collected()
            << ", path: " << config.shape_range_info_path();

  auto _predictor = CreatePaddlePredictor<AnalysisConfig>(config);
  auto* predictor = static_cast<AnalysisPredictor*>(_predictor.get());

  // Without analysis, the scope_ and sub_scope_ are created by predictor
  // itself.
  ASSERT_TRUE(predictor->scope_);
  ASSERT_TRUE(predictor->sub_scope_);
  ASSERT_EQ(predictor->scope_->parent(), nullptr);
  ASSERT_EQ(predictor->sub_scope_->parent(), predictor->scope_.get());
  // ir is turned off, so program shouldn't be optimized.
  LOG(INFO) << "scope parameters " << predictor->scope_->LocalVarNames().size();

  // 2. Dummy Input Data
  int64_t data[4] = {1, 2, 3, 4};
  PaddleTensor tensor;
  tensor.shape = std::vector<int>({4, 1});
  tensor.data.Reset(data, sizeof(data));
  tensor.dtype = PaddleDType::INT64;

  std::vector<PaddleTensor> inputs(4, tensor);
  std::vector<PaddleTensor> outputs;
  ASSERT_TRUE(predictor->Run(inputs, &outputs));
}

#ifndef WIN32
TEST(AnalysisPredictor, lite_nn_adapter_npu) {
  AnalysisConfig config;
  config.SetModel(FLAGS_dirname);
  config.EnableLiteEngine();
  config.NNAdapter()
      .Disable()
      .Enable()
      .SetDeviceNames({"huawei_ascend_npu"})
      .SetContextProperties("HUAWEI_ASCEND_NPU_SELECTED_DEVICE_IDS=0")
      .SetModelCacheDir("cache_dirr")
      .SetSubgraphPartitionConfigPath("")
      .SetModelCacheBuffers("c1", {'c'});
#ifndef LITE_SUBGRAPH_WITH_NNADAPTER
  EXPECT_THROW(CreatePaddlePredictor<AnalysisConfig>(config),
               paddle::platform::EnforceNotMet);
#endif
}
#endif

TEST(AnalysisPredictor, analysis_on) {
  AnalysisConfig config;
  config.SetModel(FLAGS_dirname);
  config.SwitchIrOptim(true);
#if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP)
  config.EnableUseGpu(100, 0);
#else
  config.DisableGpu();
#endif
  LOG(INFO) << config.Summary();

  auto _predictor = CreatePaddlePredictor<AnalysisConfig>(config);
  auto* predictor = static_cast<AnalysisPredictor*>(_predictor.get());

  ASSERT_TRUE(predictor->scope_);
  ASSERT_TRUE(predictor->sub_scope_);
  ASSERT_EQ(predictor->scope_->parent(), nullptr);
  ASSERT_EQ(predictor->sub_scope_->parent(), predictor->scope_.get());
  ASSERT_EQ(predictor->GetInputTypes().size(), 4UL);
  // 2. Dummy Input Data
  int64_t data[4] = {1, 2, 3, 4};
  PaddleTensor tensor;
  tensor.shape = std::vector<int>({4, 1});
  tensor.data.Reset(data, sizeof(data));
  tensor.dtype = PaddleDType::INT64;

  std::vector<PaddleTensor> inputs(4, tensor);
  std::vector<PaddleTensor> outputs;
  ASSERT_TRUE(predictor->Run(inputs, &outputs));

  // compare with NativePredictor
  auto naive_predictor =
      CreatePaddlePredictor<NativeConfig>(config.ToNativeConfig());
  std::vector<PaddleTensor> naive_outputs;
  ASSERT_TRUE(naive_predictor->Run(inputs, &naive_outputs));
  ASSERT_EQ(naive_outputs.size(), 1UL);
  inference::CompareTensor(outputs.front(), naive_outputs.front());
}

TEST(AnalysisPredictor, ZeroCopy) {
  AnalysisConfig config;
  config.SetModel(FLAGS_dirname);
  config.SwitchUseFeedFetchOps(false);
  LOG(INFO) << config.Summary();
  auto predictor = CreatePaddlePredictor<AnalysisConfig>(config);

  auto w0 = predictor->GetInputTensor("firstw");
  auto w1 = predictor->GetInputTensor("secondw");
  auto w2 = predictor->GetInputTensor("thirdw");
  auto w3 = predictor->GetInputTensor("forthw");

  w0->Reshape({4, 1});
  w1->Reshape({4, 1});
  w2->Reshape({4, 1});
  w3->Reshape({4, 1});

  auto* w0_data = w0->mutable_data<int64_t>(PaddlePlace::kCPU);
  auto* w1_data = w1->mutable_data<int64_t>(PaddlePlace::kCPU);
  auto* w2_data = w2->mutable_data<int64_t>(PaddlePlace::kCPU);
  auto* w3_data = w3->mutable_data<int64_t>(PaddlePlace::kCPU);

  for (int i = 0; i < 4; i++) {
    w0_data[i] = i;
    w1_data[i] = i;
    w2_data[i] = i;
    w3_data[i] = i;
  }

  predictor->ZeroCopyRun();

  auto out = predictor->GetOutputTensor("fc_1.tmp_2");
  PaddlePlace place;
  int size = 0;
  auto* out_data = out->data<float>(&place, &size);
  LOG(INFO) << "output size: " << size / sizeof(float);
  LOG(INFO) << "output_data: " << out_data;
  predictor->TryShrinkMemory();
}

TEST(AnalysisPredictor, CollectShapeRangeInfo) {
  AnalysisConfig config;
  config.SetModel(FLAGS_dirname);
  config.SwitchUseFeedFetchOps(false);
  config.EnableUseGpu(100, 0);
  config.CollectShapeRangeInfo(FLAGS_dirname + "/shape_range.pbtxt");
  LOG(INFO) << config.Summary();
  AnalysisConfig config2(config);
  auto predictor = CreatePaddlePredictor<AnalysisConfig>(config2);

  auto w0 = predictor->GetInputTensor("firstw");
  auto w1 = predictor->GetInputTensor("secondw");
  auto w2 = predictor->GetInputTensor("thirdw");
  auto w3 = predictor->GetInputTensor("forthw");

  w0->Reshape({4, 1});
  w1->Reshape({4, 1});
  w2->Reshape({4, 1});
  w3->Reshape({4, 1});
  std::vector<int64_t> input_data{0, 1, 2, 3};
  w0->copy_from_cpu(input_data.data());
  w1->copy_from_cpu(input_data.data());
  w2->copy_from_cpu(input_data.data());
  w3->copy_from_cpu(input_data.data());

  predictor->ZeroCopyRun();

  auto out = predictor->GetOutputTensor("fc_1.tmp_2");
  PaddlePlace place;
  int size = 0;
  out->data<float>(&place, &size);
  LOG(INFO) << "output size: " << size / sizeof(float);
  // TODO(wilber): check for windows
  // std::map<std::string, std::vector<int32_t>> min_shape;
  // std::map<std::string, std::vector<int32_t>> max_shape;
  // std::map<std::string, std::vector<int32_t>> opt_shape;
  // inference::DeserializeShapeRangeInfo(FLAGS_dirname + "/shape_range.pbtxt",
  //                                     &min_shape, &max_shape, &opt_shape);
  // ASSERT_EQ(min_shape.size(), 14u);
}

TEST(AnalysisPredictor, Clone) {
  AnalysisConfig config;
  config.SetModel(FLAGS_dirname);
  config.SwitchUseFeedFetchOps(true);
  config.SwitchIrOptim(true);
  LOG(INFO) << config.Summary();

  std::vector<std::unique_ptr<PaddlePredictor>> predictors;
  predictors.emplace_back(CreatePaddlePredictor(config));

  LOG(INFO) << "************** to clone ************************";
  const int num_threads = 3;
  for (int i = 1; i < num_threads; i++) {
    predictors.emplace_back(predictors.front()->Clone());
  }

  auto* root_scope =
      static_cast<AnalysisPredictor*>(predictors[0].get())->scope();
  ASSERT_FALSE(root_scope->kids().empty());
  LOG(INFO) << "***** scope ******\n"
            << framework::GenScopeTreeDebugInfo(root_scope);

  // 2. Dummy Input Data
  int64_t data[4] = {1, 2, 3, 4};
  PaddleTensor tensor;
  tensor.shape = std::vector<int>({4, 1});
  tensor.data.Reset(data, sizeof(data));
  tensor.dtype = PaddleDType::INT64;

  std::vector<PaddleTensor> inputs(4, tensor);
  std::vector<PaddleTensor> outputs;
  predictors[0]->Run(inputs, &outputs);

  LOG(INFO) << "Run with single thread";
  for (int i = 0; i < num_threads; i++) {
    LOG(INFO) << "run predictor " << i;
    ASSERT_TRUE(predictors[i]->Run(inputs, &outputs));
  }

  LOG(INFO) << "Run with multiple threads";
  std::vector<std::thread> threads;
  for (int i = 0; i < num_threads; i++) {
    threads.emplace_back([&predictors, &inputs, i] {
      LOG(INFO) << "thread #" << i << " running";
      std::vector<PaddleTensor> outputs;
      auto predictor = predictors.front()->Clone();
      for (int j = 0; j < 10; j++) {
        ASSERT_TRUE(predictor->Run(inputs, &outputs));
      }
    });
  }

  for (auto& t : threads) {
    t.join();
  }
}

// This function is not released yet, will fail on some machine.
// TODO(Superjomn) Turn on it latter.
/*
TEST(AnalysisPredictor, memory_optim) {
  AnalysisConfig config(FLAGS_dirname);
  config.DisableGpu();
  config.EnableMemoryOptim(true);
  config.SwitchIrDebug();

  auto native_predictor =
      CreatePaddlePredictor<NativeConfig>(config.ToNativeConfig());

  // 2. Dummy Input Data
  int64_t data[4] = {1, 2, 3, 4};
  PaddleTensor tensor;
  tensor.shape = std::vector<int>({4, 1});
  tensor.data.Reset(data, sizeof(data));
  tensor.dtype = PaddleDType::INT64;

  std::vector<PaddleTensor> inputs(4, tensor);
  std::vector<PaddleTensor> output, output1;

  {
    // The first predictor help to cache the memory optimize strategy.
    auto predictor = CreatePaddlePredictor<AnalysisConfig>(config);
    LOG(INFO) << "serialized program: " << predictor->GetSerializedProgram();
    ASSERT_FALSE(predictor->GetSerializedProgram().empty());

    // Run several times to check the parameters are not reused by mistake.
    for (int i = 0; i < 5; i++) {
      ASSERT_TRUE(predictor->Run(inputs, &output));
    }
  }

  {
    output.clear();
    // The second predictor to perform memory optimization.
    config.EnableMemoryOptim(false);
    auto predictor = CreatePaddlePredictor<AnalysisConfig>(config);

    // Run with memory optimization
    ASSERT_TRUE(predictor->Run(inputs, &output));
  }

  // Run native
  ASSERT_TRUE(native_predictor->Run(inputs, &output1));

  LOG(INFO) << "the output " << inference::DescribeTensor(output.front());
  LOG(INFO) << "the native output "
            << inference::DescribeTensor(output1.front());

  inference::CompareResult(output, output1);
}
*/

#if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP)
TEST(AnalysisPredictor, bf16_gpu_pass_strategy) {
  AnalysisConfig config;
  config.SetModel(FLAGS_dirname);
  config.SwitchIrOptim(true);
  config.EnableUseGpu(100, 0);
  config.EnableMkldnnBfloat16();
#ifdef PADDLE_WITH_MKLDNN
  if (platform::MayIUse(platform::cpu_isa_t::avx512_core))
    ASSERT_EQ(config.mkldnn_bfloat16_enabled(), true);
  else
    ASSERT_EQ(config.mkldnn_bfloat16_enabled(), false);
#else
  ASSERT_EQ(config.mkldnn_bfloat16_enabled(), false);
#endif
}
#endif

TEST(AnalysisPredictor, bf16_pass_strategy) {
  std::vector<std::string> passes;
  PassStrategy passStrategy(passes);
  passStrategy.EnableMkldnnBfloat16();
}

#ifdef PADDLE_WITH_XPU
TEST(AnalysisPredictor, set_xpu_device_id) {
  AnalysisConfig config;
  config.EnableXpu();
  config.SetXpuDeviceId(0);
  ASSERT_EQ(config.xpu_device_id(), 0);
  config.SetXpuDeviceId(1);
  ASSERT_EQ(config.xpu_device_id(), 1);
}
#endif

TEST(AnalysisPredictor, enable_onnxruntime) {
  AnalysisConfig config;
  config.EnableONNXRuntime();
#ifdef PADDLE_WITH_ONNXRUNTIME
  ASSERT_TRUE(config.use_onnxruntime());
#else
  ASSERT_TRUE(!config.use_onnxruntime());
#endif
  config.EnableORTOptimization();
#ifdef PADDLE_WITH_ONNXRUNTIME
  ASSERT_TRUE(config.ort_optimization_enabled());
#else
  ASSERT_TRUE(!config.ort_optimization_enabled());
#endif
  config.DisableONNXRuntime();
  ASSERT_TRUE(!config.use_onnxruntime());
}

}  // namespace paddle

namespace paddle_infer {

TEST(Predictor, Run) {
  auto trt_compile_ver = GetTrtCompileVersion();
  auto trt_runtime_ver = GetTrtRuntimeVersion();
  LOG(INFO) << "trt compile version: " << std::get<0>(trt_compile_ver) << "."
            << std::get<1>(trt_compile_ver) << "."
            << std::get<2>(trt_compile_ver);
  LOG(INFO) << "trt runtime version: " << std::get<0>(trt_runtime_ver) << "."
            << std::get<1>(trt_runtime_ver) << "."
            << std::get<2>(trt_runtime_ver);

  Config config;
  config.SetModel(FLAGS_dirname);

  auto predictor = CreatePredictor(config);
  ASSERT_EQ(predictor->GetInputTypes().size(), 4UL);

  auto w0 = predictor->GetInputHandle("firstw");
  auto w1 = predictor->GetInputHandle("secondw");
  auto w2 = predictor->GetInputHandle("thirdw");
  auto w3 = predictor->GetInputHandle("forthw");

  w0->Reshape({4, 1});
  w1->Reshape({4, 1});
  w2->Reshape({4, 1});
  w3->Reshape({4, 1});

  auto* w0_data = w0->mutable_data<int64_t>(PlaceType::kCPU);
  auto* w1_data = w1->mutable_data<int64_t>(PlaceType::kCPU);
  auto* w2_data = w2->mutable_data<int64_t>(PlaceType::kCPU);
  auto* w3_data = w3->mutable_data<int64_t>(PlaceType::kCPU);

  for (int i = 0; i < 4; i++) {
    w0_data[i] = i;
    w1_data[i] = i;
    w2_data[i] = i;
    w3_data[i] = i;
  }

  predictor->Run();

  auto out = predictor->GetOutputHandle("fc_1.tmp_2");
  PlaceType place;
  int size = 0;
  out->data<float>(&place, &size);
  LOG(INFO) << "output size: " << size / sizeof(float);
  predictor->TryShrinkMemory();
}

TEST(Predictor, EnableONNXRuntime) {
  Config config;
  config.SetModel(FLAGS_dirname);
  config.EnableONNXRuntime();
  config.EnableORTOptimization();
  auto predictor = CreatePredictor(config);
}

TEST(Tensor, CpuShareExternalData) {
  Config config;
  config.SetModel(FLAGS_dirname);

  auto predictor = CreatePredictor(config);

  auto w0 = predictor->GetInputHandle("firstw");
  auto w1 = predictor->GetInputHandle("secondw");
  auto w2 = predictor->GetInputHandle("thirdw");
  auto w3 = predictor->GetInputHandle("forthw");

  std::vector<std::vector<int64_t>> input_data(4, {0, 1, 2, 3});
  w0->ShareExternalData<int64_t>(input_data[0].data(), {4, 1}, PlaceType::kCPU);
  w1->ShareExternalData<int64_t>(input_data[1].data(), {4, 1}, PlaceType::kCPU);
  w2->ShareExternalData<int64_t>(input_data[2].data(), {4, 1}, PlaceType::kCPU);
  w3->ShareExternalData<int64_t>(input_data[3].data(), {4, 1}, PlaceType::kCPU);

  auto out = predictor->GetOutputHandle("fc_1.tmp_2");
  auto out_shape = out->shape();
  std::vector<float> out_data;
  out_data.resize(std::accumulate(
      out_shape.begin(), out_shape.end(), 1, std::multiplies<int>()));
  out->ShareExternalData<float>(out_data.data(), out_shape, PlaceType::kCPU);

  predictor->Run();

  PlaceType place;
  int size = 0;
  out->data<float>(&place, &size);
  LOG(INFO) << "output size: " << size / sizeof(float);
  predictor->TryShrinkMemory();
}

#if defined(PADDLE_WITH_CUDA)
TEST(Tensor, GpuShareExternalData) {
  Config config;
  config.SetModel(FLAGS_dirname);
  config.EnableUseGpu(100, 0);

  auto predictor = CreatePredictor(config);

  auto w0 = predictor->GetInputHandle("firstw");
  auto w1 = predictor->GetInputHandle("secondw");
  auto w2 = predictor->GetInputHandle("thirdw");
  auto w3 = predictor->GetInputHandle("forthw");

  std::vector<std::vector<int64_t>> input_data(4, {0, 1, 2, 3});
  std::vector<int64_t*> input_gpu(4, nullptr);

  for (size_t i = 0; i < 4; ++i) {
    cudaMalloc(reinterpret_cast<void**>(&input_gpu[i]), 4 * sizeof(int64_t));
    cudaMemcpy(input_gpu[i],
               input_data[i].data(),
               4 * sizeof(int64_t),
               cudaMemcpyHostToDevice);
  }

  w0->ShareExternalData<int64_t>(input_gpu[0], {4, 1}, PlaceType::kGPU);
  w1->ShareExternalData<int64_t>(input_gpu[1], {4, 1}, PlaceType::kGPU);
  w2->ShareExternalData<int64_t>(input_gpu[2], {4, 1}, PlaceType::kGPU);
  w3->ShareExternalData<int64_t>(input_gpu[3], {4, 1}, PlaceType::kGPU);

  auto out = predictor->GetOutputHandle("fc_1.tmp_2");
  auto out_shape = out->shape();
  float* out_data = nullptr;
  auto out_size =
      std::accumulate(
          out_shape.begin(), out_shape.end(), 1, std::multiplies<int>()) *
      sizeof(float);
  cudaMalloc(reinterpret_cast<void**>(out_data), out_size * sizeof(float));
  out->ShareExternalData<float>(out_data, out_shape, PlaceType::kGPU);

  predictor->Run();

  PlaceType place;
  int size = 0;
  out->data<float>(&place, &size);
  LOG(INFO) << "output size: " << size / sizeof(float);
  predictor->TryShrinkMemory();
}

TEST(Predictor, Streams) {
  // internal stream.
  {
    Config config;
    config.SetModel(FLAGS_dirname);
    config.EnableUseGpu(100, 0);
    auto predictor = CreatePredictor(config);
    gpuStream_t stream =
        reinterpret_cast<gpuStream_t>(predictor->GetExecStream());
    CHECK_EQ(paddle::ResourceManager::Instance().RefCount(stream), 0);
  }

  // internal stream, create 2 predictor.
  {
    Config config1;
    config1.SetModel(FLAGS_dirname);
    config1.EnableUseGpu(100, 0);
    auto predictor1 = CreatePredictor(config1);
    gpuStream_t stream1 =
        reinterpret_cast<gpuStream_t>(predictor1->GetExecStream());
    CHECK_EQ(paddle::ResourceManager::Instance().RefCount(stream1), 0);

    Config config2;
    config2.SetModel(FLAGS_dirname);
    config2.EnableUseGpu(100, 0);
    auto predictor2 = CreatePredictor(config2);
    gpuStream_t stream2 =
        reinterpret_cast<gpuStream_t>(predictor2->GetExecStream());
    CHECK_EQ(paddle::ResourceManager::Instance().RefCount(stream2), 0);
    CHECK_EQ(stream1, stream2);
  }

  // internal stream, clone
  {
    Config config;
    config.SetModel(FLAGS_dirname);
    config.EnableUseGpu(100, 0);
    auto predictor = CreatePredictor(config);
    gpuStream_t stream =
        reinterpret_cast<gpuStream_t>(predictor->GetExecStream());
    CHECK_EQ(paddle::ResourceManager::Instance().RefCount(stream), 0);

    auto predictor2 = predictor->Clone();
    gpuStream_t stream2 =
        reinterpret_cast<gpuStream_t>(predictor2->GetExecStream());
    CHECK_EQ(paddle::ResourceManager::Instance().RefCount(stream2), 0);
    CHECK_EQ(stream, stream2);
  }

  // external stream
  {
    cudaStream_t external_stream;
    cudaStreamCreate(&external_stream);
    Config config;
    config.SetModel(FLAGS_dirname);
    config.EnableUseGpu(100, 0);
    config.SetExecStream(external_stream);
    CHECK_EQ(config.external_stream_enabled(), true);

    auto predictor = CreatePredictor(config);
    gpuStream_t stream =
        reinterpret_cast<gpuStream_t>(predictor->GetExecStream());
    CHECK_EQ(external_stream, stream);
    CHECK_NOTNULL(paddle::ResourceManager::Instance().GetGPUResource(stream));
    CHECK_EQ(paddle::ResourceManager::Instance().RefCount(stream), 1);
  }

  // 2 predictor on 2 stream
  {
    cudaStream_t external_stream;
    cudaStreamCreate(&external_stream);
    Config config;
    config.SetModel(FLAGS_dirname);
    config.EnableUseGpu(100, 0);
    config.SetExecStream(external_stream);
    auto predictor = CreatePredictor(config);
    gpuStream_t stream =
        reinterpret_cast<gpuStream_t>(predictor->GetExecStream());
    CHECK_NOTNULL(paddle::ResourceManager::Instance().GetGPUResource(stream));
    CHECK_EQ(paddle::ResourceManager::Instance().RefCount(stream), 1);

    cudaStream_t external_stream2;
    cudaStreamCreate(&external_stream2);
    Config config2;
    config2.SetModel(FLAGS_dirname);
    config2.EnableUseGpu(100, 0);
    config2.SetExecStream(external_stream2);
    auto predictor2 = CreatePredictor(config2);
    gpuStream_t stream2 =
        reinterpret_cast<gpuStream_t>(predictor2->GetExecStream());
    CHECK_NOTNULL(paddle::ResourceManager::Instance().GetGPUResource(stream2));
    CHECK_EQ(paddle::ResourceManager::Instance().RefCount(stream2), 1);

    CHECK_NE(stream, stream2);
  }
}
#endif

TEST(AnalysisPredictor, OutputHookFunc) {
  auto hookfunc = [](const std::string& type,
                     const std::string& var_name,
                     const Tensor& tensor) { LOG(INFO) << "in hook function"; };

  {
    Config config;
    config.SetModel(FLAGS_dirname);
    config.EnableUseGpu(100, 0);

    auto predictor = CreatePredictor(config);

    predictor->RegisterOutputHook(hookfunc);
    auto w0 = predictor->GetInputHandle("firstw");
    auto w1 = predictor->GetInputHandle("secondw");
    auto w2 = predictor->GetInputHandle("thirdw");
    auto w3 = predictor->GetInputHandle("forthw");
    w0->Reshape({4, 1});
    w1->Reshape({4, 1});
    w2->Reshape({4, 1});
    w3->Reshape({4, 1});
    auto* w0_data = w0->mutable_data<int64_t>(PlaceType::kCPU);
    auto* w1_data = w1->mutable_data<int64_t>(PlaceType::kCPU);
    auto* w2_data = w2->mutable_data<int64_t>(PlaceType::kCPU);
    auto* w3_data = w3->mutable_data<int64_t>(PlaceType::kCPU);
    for (int i = 0; i < 4; i++) {
      w0_data[i] = i;
      w1_data[i] = i;
      w2_data[i] = i;
      w3_data[i] = i;
    }
    predictor->Run();
    predictor->TryShrinkMemory();
  }

  {
    Config config;
    config.SetModel(FLAGS_dirname);
    config.EnableMemoryOptim();
    config.EnableUseGpu(100, 0);

    auto predictor = CreatePredictor(config);

    predictor->RegisterOutputHook(hookfunc);
  }
}

}  // namespace paddle_infer
