text: /* Copyright (c) 2017 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. */
  #pragma once
  
  #include <memory>
  #include <sstream>
  #include <string>
  #include <utility>
  #include <vector>
  #include "boost/optional.hpp"
  #include "paddle/fluid/framework/data_layout_transform.h"
  #include "paddle/fluid/framework/operator.h"
  #include "paddle/fluid/operators/pool_op.h"
  #include "paddle/fluid/platform/mkldnn_helper.h"
  #include "paddle/fluid/platform/place.h"
  
  namespace paddle {
  namespace platform {
  
  using framework::DataLayout;
  using framework::Tensor;
  using user_function = std::function<std::shared_ptr<float>(const float*)>;
  using memory = mkldnn::memory;
  
  template <typename T, typename TForward,
            typename TBackward = mkldnn_dummy_primitive>
  class MKLDNNHandlerT {
   public:
    MKLDNNHandlerT(const MKLDNNDeviceContext& dev_ctx, mkldnn::engine engine,
                   platform::Place cpu_place, const std::string& base_key)
        : dev_ctx_(dev_ctx),
          engine_(engine),
          place_(cpu_place),
          key_common_(base_key),
          fwd_pd_(nullptr),
          bwd_pd_(nullptr) {
      if (platform::MKLDNNDeviceContext::tls().get_cur_mkldnn_session_id() !=
          platform::MKLDNNDeviceContextThreadLocals::kMKLDNNSessionID_Default) {
        key_ = key_common_;
      } else {
        key_ = key_common_ + "-t:" + ThreadIDasStr();
      }
    }
  
    std::shared_ptr<TForward> AcquireForwardPrimitive() {
      const std::string key_p = key_ + "@fwd_p";
      auto forward_p =
          std::static_pointer_cast<TForward>(dev_ctx_.GetBlob(key_p));
      if (forward_p == nullptr) {
        forward_p = std::make_shared<TForward>(*fwd_pd_);
        dev_ctx_.SetBlob(key_p, forward_p);
      }
      return forward_p;
    }
  
    std::shared_ptr<TBackward> AcquireBackwardPrimitive() {
      const std::string key_p = key_ + "@bwd_p";
      auto backward_p =
          std::static_pointer_cast<TBackward>(dev_ctx_.GetBlob(key_p));
      if (backward_p == nullptr) {
        backward_p = std::make_shared<TBackward>(*bwd_pd_);
        dev_ctx_.SetBlob(key_p, backward_p);
      }
      return backward_p;
    }
  
    std::shared_ptr<mkldnn::memory> AcquireSrcMemory(
        const framework::Tensor* input) {
      const T* input_data = input->data<T>();
      return this->AcquireMemoryFromPrimitive(
          fwd_pd_->src_desc(), to_void_cast<T>(input_data), "@src_mem_p");
    }
  
    template <typename T_out = T>
    std::shared_ptr<mkldnn::memory> AcquireDstMemory(framework::Tensor* output) {
      T_out* ptr =
          output->mutable_data<T_out>(place_, fwd_pd_->dst_desc().get_size());
      return this->AcquireMemoryFromPrimitive(fwd_pd_->dst_desc(), ptr,
                                              "@dst_mem_p");
    }
  
    template <typename T_out = T>
    std::shared_ptr<mkldnn::memory> AcquireDstMemory(
        const framework::Tensor* output) {
      const T_out* output_data = output->data<T_out>();
      return this->AcquireMemoryFromPrimitive(bwd_pd_->dst_desc(),
                                              to_void_cast<T_out>(output_data),
                                              "@bwd-dst_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDiffDstMemory(
        const framework::Tensor* diffdst) {
      const T* ptr = diffdst->data<T>();
      return this->AcquireMemoryFromPrimitive(
          bwd_pd_->diff_dst_desc(), to_void_cast<T>(ptr), "@diff_dst_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDiffSrcMemory(
        framework::Tensor* diffsrc) {
      T* ptr =
          diffsrc->mutable_data<T>(place_, bwd_pd_->diff_src_desc().get_size());
      return this->AcquireMemoryFromPrimitive(bwd_pd_->diff_src_desc(), ptr,
                                              "@diff_src_mem_p");
    }
  
   protected:
    bool isCached() {
      const std::string key_pd = key_common_ + "@fwd_pd";
      fwd_pd_ = std::static_pointer_cast<typename TForward::primitive_desc>(
          dev_ctx_.GetBlob(key_pd));
  
      const std::string key_p = key_ + "@fwd_p";
      return (dev_ctx_.GetBlob(key_p) != nullptr);
    }
  
    // If your primitive descriptor requires attributes, pass them as a
    // first argument and paramters to descriptor constructor in the following
    // arguments. Otherwise, all arguments will be forwarded to descriptor
    // constructor, including the first one.
    template <typename Arg, typename... Args>
    void AcquireForwardPrimitiveDescriptor(Arg&& first_arg, Args&&... args) {
      // Forward PD has to be passed to Grad op that
      // may be executed by diffrent thread, hence
      // for that one we use key that does not contain TID
      const std::string key_pd = key_common_ + "@fwd_pd";
      fwd_pd_ = std::static_pointer_cast<typename TForward::primitive_desc>(
          dev_ctx_.GetBlob(key_pd));
      if (fwd_pd_ == nullptr) {
        static std::mutex acquire_barrier;
        std::lock_guard<std::mutex> block_threads_until_finish_this_job(
            acquire_barrier);
        fwd_pd_ = std::static_pointer_cast<typename TForward::primitive_desc>(
            dev_ctx_.GetBlob(key_pd));
        if (fwd_pd_ == nullptr) {
          CreateForwardPrimitiveDescriptor(first_arg,
                                           std::forward<Args>(args)...);
          dev_ctx_.SetBlob(key_pd, fwd_pd_);
        }
      }
    }
  
    // Using sfinae to specialise variadic function. Workaround for not having
    // if constexpr in C++ 11.
    template <class First, class... Args>
    typename std::enable_if<std::is_same<typename std::decay<First>::type,
                                         dnnl::primitive_attr>::value>::type
    CreateForwardPrimitiveDescriptor(First&& first, Args&&... args) {
      auto fwd_desc = typename TForward::desc(std::forward<Args>(args)...);
      fwd_pd_ = std::make_shared<typename TForward::primitive_desc>(
          fwd_desc, first, engine_);
    }
  
    template <class First, class... Args>
    typename std::enable_if<!std::is_same<typename std::decay<First>::type,
                                          dnnl::primitive_attr>::value>::type
    CreateForwardPrimitiveDescriptor(First&& first, Args&&... args) {
      auto fwd_desc = typename TForward::desc(std::forward<First>(first),
                                              std::forward<Args>(args)...);
      fwd_pd_ =
          std::make_shared<typename TForward::primitive_desc>(fwd_desc, engine_);
    }
  
    template <typename... Args>
    void AcquireBackwardPrimitiveDescriptor(Args&&... args) {
      const std::string key_fwd_pd = key_common_ + "@fwd_pd";
      fwd_pd_ = std::static_pointer_cast<typename TForward::primitive_desc>(
          dev_ctx_.GetBlob(key_fwd_pd));
      PADDLE_ENFORCE_NOT_NULL(
          fwd_pd_, platform::errors::Unavailable(
                       "Get MKLDNN Forward primitive %s failed.", key_fwd_pd));
      const std::string key_pd = key_ + "@bwd_pd";
      bwd_pd_ = std::static_pointer_cast<typename TBackward::primitive_desc>(
          dev_ctx_.GetBlob(key_pd));
      if (bwd_pd_ == nullptr) {
        auto bwd_desc = typename TBackward::desc(std::forward<Args>(args)...);
        bwd_pd_ = std::make_shared<typename TBackward::primitive_desc>(
            bwd_desc, engine_, *fwd_pd_);
        dev_ctx_.SetBlob(key_pd, bwd_pd_);
      }
    }
  
    std::shared_ptr<mkldnn::memory> AcquireMemoryFromPrimitive(
        mkldnn::memory::desc md, void* ptr, const std::string& suffix) {
      const auto local_key = key_ + suffix;
      auto mem_p =
          std::static_pointer_cast<mkldnn::memory>(dev_ctx_.GetBlob(local_key));
      if (mem_p == nullptr) {
        mem_p = std::make_shared<mkldnn::memory>(md, engine_, ptr);
        dev_ctx_.SetBlob(local_key, mem_p);
      } else {
        mem_p->set_data_handle(ptr);
      }
      return mem_p;
    }
  
    std::shared_ptr<mkldnn::memory> AcquireMemoryFromPrimitive(
        mkldnn::memory::desc md, const std::string& suffix) {
      const auto local_key = key_ + suffix;
      auto mem_p =
          std::static_pointer_cast<mkldnn::memory>(dev_ctx_.GetBlob(local_key));
      if (mem_p == nullptr) {
        mem_p = std::make_shared<mkldnn::memory>(md, engine_);
        dev_ctx_.SetBlob(local_key, mem_p);
      }
      return mem_p;
    }
  
    void AcquireReorder(const std::shared_ptr<mkldnn::memory>& user_memory_p,
                        const std::shared_ptr<mkldnn::memory>& target_memory_p,
                        const std::string& suffix) {
      const auto key_reorder_p = key_ + suffix + "reorder_p";
  
      auto reorder_p = std::static_pointer_cast<mkldnn::reorder>(
          dev_ctx_.GetBlob(key_reorder_p));
  
      if (reorder_p == nullptr) {
        reorder_p =
            std::make_shared<mkldnn::reorder>(*user_memory_p, *target_memory_p);
        dev_ctx_.SetBlob(key_reorder_p, reorder_p);
      }
  
      mkldnn::stream astream(engine_);
      reorder_p->execute(astream, {{MKLDNN_ARG_FROM, *user_memory_p},
                                   {MKLDNN_ARG_TO, *target_memory_p}});
      astream.wait();
    }
  
    std::shared_ptr<mkldnn::memory> AcquireMemoryWithReorder(
        const mkldnn::memory::desc& user_md,
        const mkldnn::memory::desc& target_md, void* ptr,
        const std::string& suffix, bool is_persistent = false) {
      const auto target_key = key_ + suffix + "_target";
      const auto key_reorder_p = key_ + suffix + "reorder_p";
      const auto user_key = key_ + suffix + "_user";
  
      auto target_memory_p =
          std::static_pointer_cast<dnnl::memory>(dev_ctx_.GetBlob(target_key));
  
      if (target_memory_p == nullptr) {
        auto user_memory_p =
            std::make_shared<dnnl::memory>(user_md, engine_, ptr);
        if (user_md != target_md) {
          target_memory_p = std::make_shared<mkldnn::memory>(target_md, engine_);
          auto reorder_p =
              std::make_shared<dnnl::reorder>(*user_memory_p, *target_memory_p);
          dev_ctx_.SetBlob(key_reorder_p, reorder_p);
  
          mkldnn::stream astream(engine_);
          reorder_p->execute(astream, {{MKLDNN_ARG_FROM, *user_memory_p},
                                       {MKLDNN_ARG_TO, *target_memory_p}});
          astream.wait();
        } else {
          target_memory_p = user_memory_p;
        }
        dev_ctx_.SetBlob(user_key, user_memory_p);
        dev_ctx_.SetBlob(target_key, target_memory_p);
      } else if (!is_persistent) {
        mkldnn::stream astream(engine_);
  
        auto user_memory_p =
            std::static_pointer_cast<dnnl::memory>(dev_ctx_.GetBlob(user_key));
        user_memory_p->set_data_handle(ptr);
  
        auto reorder_p = std::static_pointer_cast<mkldnn::reorder>(
            dev_ctx_.GetBlob(key_reorder_p));
        if (reorder_p != nullptr) {
          reorder_p->execute(astream, {{MKLDNN_ARG_FROM, *user_memory_p},
                                       {MKLDNN_ARG_TO, *target_memory_p}});
          astream.wait();
        }
      }
      return target_memory_p;
    }
  
    std::shared_ptr<mkldnn::memory> AcquireMemory(const std::string& suffix) {
      const auto local_key = key_ + suffix;
      return std::static_pointer_cast<mkldnn::memory>(
          dev_ctx_.GetBlob(local_key));
    }
  
    const MKLDNNDeviceContext& dev_ctx_;
    mkldnn::engine engine_;
    platform::Place place_;
    std::string key_;
    std::string key_common_;
    std::shared_ptr<typename TForward::primitive_desc> fwd_pd_;
    std::shared_ptr<typename TBackward::primitive_desc> bwd_pd_;
  };
  
  // TODO(grygielski) this class will be deleted later.
  class MKLDNNHandler {
   public:
    MKLDNNHandler(const MKLDNNDeviceContext& dev_ctx, mkldnn::engine engine,
                  const std::string& base_key)
        : dev_ctx_(dev_ctx), engine_(engine), key_common_(base_key) {
      if (platform::MKLDNNDeviceContext::tls().get_cur_mkldnn_session_id() !=
          platform::MKLDNNDeviceContextThreadLocals::kMKLDNNSessionID_Default) {
        key_ = key_common_;
      } else {
        key_ = key_common_ + "-t:" + ThreadIDasStr();
      }
    }
  
    std::shared_ptr<mkldnn::memory> AcquireSrcMemory(
        const mkldnn::memory::desc& md, void* ptr) {
      return this->AcquireMemory(md, ptr, "@user_src_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDstMemory(
        const mkldnn::memory::desc& md, void* ptr) {
      return this->AcquireMemory(md, ptr, "@user_dst_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDiffSrcMemory(
        const mkldnn::memory::desc& md, void* ptr) {
      return this->AcquireMemory(md, ptr, "@user_diff_src_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDiffDstMemory(
        const mkldnn::memory::desc& md, void* ptr) {
      return this->AcquireMemory(md, ptr, "@user_diff_dst_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireMemoryFromPrimitive(
        mkldnn::memory::desc md, void* ptr, const std::string& suffix) {
      auto local_key = key_ + suffix;
      auto mem_p =
          std::static_pointer_cast<mkldnn::memory>(dev_ctx_.GetBlob(local_key));
      if (mem_p == nullptr) {
        mem_p = std::make_shared<mkldnn::memory>(md, engine_, ptr);
        dev_ctx_.SetBlob(local_key, mem_p);
      } else {
        mem_p->set_data_handle(ptr);
      }
      return mem_p;
    }
  
    // This incarnation of AcquireMemory can call user function eg. custom reorder
    // or preprocessing routine if needed
    std::shared_ptr<mkldnn::memory> AcquireMemory(
        const mkldnn::memory::desc& md, void* ptr, const std::string& suffix,
        user_function custom_func = {}) {
      /*Generate key*/
      auto local_key = key_ + suffix;
      auto mem_p =
          std::static_pointer_cast<mkldnn::memory>(dev_ctx_.GetBlob(local_key));
      if (mem_p == nullptr) {
        // Call custom reorder/preprocessing func if available
        if (custom_func) {
          auto reordered_data = custom_func(reinterpret_cast<const float*>(ptr));
          dev_ctx_.SetBlob(local_key + "-custom_reorder", reordered_data);
          ptr = reinterpret_cast<void*>(reordered_data.get());
        }
  
        mem_p = std::make_shared<mkldnn::memory>(md, engine_, ptr);
        dev_ctx_.SetBlob(local_key, mem_p);
      } else {
        mem_p->set_data_handle(ptr);
      }
      return mem_p;
    }
  
    std::shared_ptr<mkldnn::memory> AcquireMemory(
        const std::vector<int64_t>& dims, const mkldnn::memory::data_type dtype,
        const MKLDNNMemoryFormat& fmt, void* ptr, const std::string& suffix) {
      /*Generate key*/
      auto local_key = key_ + suffix;
      auto mem_p =
          std::static_pointer_cast<mkldnn::memory>(dev_ctx_.GetBlob(local_key));
      if (mem_p == nullptr) {
        auto md = mkldnn::memory::desc(dims, dtype, fmt);
  
        mem_p = std::make_shared<mkldnn::memory>(md, engine_, ptr);
        dev_ctx_.SetBlob(local_key, mem_p);
      } else {
        mem_p->set_data_handle(ptr);
      }
      return mem_p;
    }
  
    std::shared_ptr<mkldnn::memory> AcquireMemory(
        const std::shared_ptr<mkldnn::memory>& user_memory_p,
        const std::shared_ptr<mkldnn::memory>& target_memory_p,
        const std::string& suffix,
        std::vector<mkldnn::primitive>& pipeline) {  // NOLINT
      auto local_key = key_ + suffix;
      auto key_reorder_p = key_ + suffix + "reorder_p";
  
      auto stored_reorder_p = std::static_pointer_cast<mkldnn::reorder>(
          dev_ctx_.GetBlob(key_reorder_p));
  
      if (stored_reorder_p) {
        pipeline.push_back(*stored_reorder_p);
      } else {
        auto reorder_p =
            std::make_shared<mkldnn::reorder>(*user_memory_p, *target_memory_p);
        dev_ctx_.SetBlob(key_reorder_p, reorder_p);
        mkldnn::stream astream(engine_);
        reorder_p->execute(astream, {{MKLDNN_ARG_FROM, *user_memory_p},
                                     {MKLDNN_ARG_TO, *target_memory_p}});
        astream.wait();
      }
  
      return target_memory_p;
    }
  
    std::shared_ptr<mkldnn::memory> AcquireMemory(
        mkldnn::memory::desc& md,       // NOLINT
        mkldnn::memory::desc& user_md,  // NOLINT
        const std::shared_ptr<mkldnn::memory> user_memory_p,
        const std::string& suffix,
        std::vector<mkldnn::primitive>& pipeline,  // NOLINT
        bool is_persistent = false, bool is_INT8 = false,
        std::vector<float> scale_data = {1.0f}, int mask = 0) {
      // create reorder primitive if the input format is not the preferred one
      auto local_key = key_ + suffix;
      auto key_reorder_p = key_ + suffix + "reorder_p";
  
      auto target_memory_p =
          std::static_pointer_cast<mkldnn::memory>(dev_ctx_.GetBlob(local_key));
  
      mkldnn::stream astream(engine_);
  
      if (target_memory_p == nullptr) {
        target_memory_p = user_memory_p;
        if (md != user_md) {
          target_memory_p = std::make_shared<mkldnn::memory>(md, engine_);
          std::shared_ptr<mkldnn::reorder::primitive_desc> reorder_pd;
          if (is_INT8) {
            mkldnn::primitive_attr
                attri;  // attribute for int8 weights and bias data reorder.
            attri.set_output_scales(mask, scale_data);
  
            reorder_pd = std::shared_ptr<mkldnn::reorder::primitive_desc>(
                new mkldnn::reorder::primitive_desc(*user_memory_p,
                                                    *target_memory_p, attri));
          } else {
            reorder_pd = std::shared_ptr<mkldnn::reorder::primitive_desc>(
                new mkldnn::reorder::primitive_desc(*user_memory_p,
                                                    *target_memory_p));
          }
          auto reorder_p =
              std::shared_ptr<mkldnn::reorder>(new mkldnn::reorder(*reorder_pd));
          dev_ctx_.SetBlob(key_reorder_p, reorder_p);
  
          reorder_p->execute(astream, {{MKLDNN_ARG_FROM, *user_memory_p},
                                       {MKLDNN_ARG_TO, *target_memory_p}});
          astream.wait();
        }
        dev_ctx_.SetBlob(local_key, target_memory_p);
      } else if (!is_persistent) {
        // Make reorder if needed
        auto reorder_p = std::static_pointer_cast<mkldnn::reorder>(
            dev_ctx_.GetBlob(key_reorder_p));
        if (reorder_p != nullptr) {
          reorder_p->execute(astream, {{MKLDNN_ARG_FROM, *user_memory_p},
                                       {MKLDNN_ARG_TO, *target_memory_p}});
          astream.wait();
        }
      }
      return target_memory_p;
    }
  
   protected:
    const MKLDNNDeviceContext& dev_ctx_;
    mkldnn::engine engine_;
    std::string key_;
    std::string key_common_;
  };
  
  template <typename T>
  class BinaryMKLDNNHandler : public platform::MKLDNNHandlerT<T, dnnl::binary> {
   public:
    BinaryMKLDNNHandler(const dnnl::algorithm algo, const int axis,
                        const MKLDNNDeviceContext& dev_ctx,
                        const mkldnn::engine engine, platform::Place cpu_place,
                        const Tensor* x, const Tensor* y, Tensor* z,
                        float scale_x, float scale_y, float scale_z,
                        const std::string& uniq_name)
        : platform::MKLDNNHandlerT<T, dnnl::binary>(
              dev_ctx, engine, cpu_place,
              platform::CreateKey(
                  framework::vectorize(x->dims()),
                  uniq_name + (algo == dnnl::algorithm::binary_mul ? "M" : ""))) {
      // bradcasting combined with in-place may require
      auto rankdiff = x->dims().size() - y->dims().size();
      if (rankdiff > 0) {
        auto suffix = std::to_string(rankdiff);
        this->key_ += suffix;
        this->key_common_ += suffix;
      }
  
      if (!this->isCached()) {
        PADDLE_ENFORCE_EQ(
            x->layout(), DataLayout::kMKLDNN,
            platform::errors::InvalidArgument("Wrong layout set for X tensor."));
        PADDLE_ENFORCE_NE(
            x->format(), MKLDNNMemoryFormat::undef,
            platform::errors::InvalidArgument("Wrong format set for X tensor."));
  
        PADDLE_ENFORCE_EQ(
            y->layout(), DataLayout::kMKLDNN,
            platform::errors::InvalidArgument("Wrong layout set for Y tensor."));
        PADDLE_ENFORCE_NE(
            y->format(), MKLDNNMemoryFormat::undef,
            platform::errors::InvalidArgument("Wrong format set for Y tensor."));
  
        const auto src_x_tz = framework::vectorize(x->dims());
        const auto src_y_tz = framework::vectorize(y->dims());
        const auto dst_tz = framework::vectorize(z->dims());
  
        const auto src0_md = dnnl::memory::desc(
            src_x_tz, platform::MKLDNNGetDataType<T>(), x->format());
        auto src1_md = dnnl::memory::desc(
            src_y_tz, platform::MKLDNNGetDataType<T>(), y->format());
        if (rankdiff > 0) {
          std::vector<int64_t> dims1_ex(rankdiff, 1);
          dims1_ex.insert(next(dims1_ex.begin(), (axis == -1 ? rankdiff : axis)),
                          src_y_tz.begin(), src_y_tz.end());
          src1_md = src1_md.reshape(dims1_ex);
        }
        const auto dst_md = memory::desc(dst_tz, platform::MKLDNNGetDataType<T>(),
                                         MKLDNNMemoryFormat::any);
  
        auto attributes = CreateAttributes(algo, scale_x, scale_y, scale_z);
        this->AcquireForwardPrimitiveDescriptor(attributes, algo, src0_md,
                                                src1_md, dst_md);
      }
    }
  
    std::shared_ptr<mkldnn::memory> AcquireSecondSrcMemory(
        const framework::Tensor* input) {
      const T* input_data = input->data<T>();
      return this->AcquireMemoryFromPrimitive(
          this->fwd_pd_->src1_desc(), to_void_cast<T>(input_data), "@src1_mem_p");
    }
  
   private:
    static inline dnnl::primitive_attr CreateAttributes(dnnl::algorithm op,
                                                        float scale_x,
                                                        float scale_y,
                                                        float scale_z) {
      // Scales set in attributes for inputs contibute to the output equation
      // in the following way (assuming no broadcasting takes place):
      // output_i = scale_0 * x_i <+ or *> scale_1 * y_i;
      // Hence we have to create scales that will:
      // 1. Dequantize both values, by multiplying with (1.0 / scale_x_or_y)
      // 2. Quantize their result to output scale range, by multiplying with
      // (scale_z)
      // If we combine these two, we end up with following equation
      // output = scale_out * (1/scale_x * x <* or +> 1/scale_y * y)
      // Hence, to mimic such behaviour using provided interface,
      // For add operation the equation is equal to:
      // output = (scale_out / scale_x) * x + (scale_out / scale_y) * y
      //                <scale_0>                  <scale_1>
      // For mul operation on the other hand
      // output = (scale_out / scale_x) * x * (1.0 / scale_y) * y
      //                <scale_0>                 <scale_1>
      float scale_0 = scale_z / scale_x;
      float scale_1 =
          op == dnnl::algorithm::binary_add ? scale_z / scale_y : 1.0 / scale_y;
      dnnl::primitive_attr attributes;
      attributes.set_scales(/* input_x_id = */ DNNL_ARG_SRC_0, /* mask = */ 0,
                            {scale_0});
      attributes.set_scales(/* input_y_id = */ DNNL_ARG_SRC_1, /* mask = */ 0,
                            {scale_1});
      return attributes;
    }
  };
  
  class SumMKLDNNHandler : public MKLDNNHandler {
   public:
    SumMKLDNNHandler(const platform::MKLDNNDeviceContext& dev_ctx,
                     mkldnn::engine engine, const std::string& base_key)
        : platform::MKLDNNHandler(dev_ctx, engine, base_key) {}
  
    std::shared_ptr<mkldnn::sum::primitive_desc> AcquireSumPrimitiveDescriptor(
        const std::vector<std::shared_ptr<mkldnn::memory>>& src_mems,
        const std::vector<float>& scales, const mkldnn::memory::desc& dst_md) {
      const std::string key_sum_pd = key_ + "@sum_pd";
  
      sum_pd_ = std::static_pointer_cast<mkldnn::sum::primitive_desc>(
          dev_ctx_.GetBlob(key_sum_pd));
      if (sum_pd_ == nullptr) {
        // Get vector of inputs primitive descriptors
        std::vector<mkldnn::memory::desc> src_ds;
        for (auto& input_mem : src_mems) {
          src_ds.push_back(input_mem->get_desc());
        }
  
        sum_pd_.reset(
            new mkldnn::sum::primitive_desc(dst_md, scales, src_ds, engine_));
        dev_ctx_.SetBlob(key_sum_pd, sum_pd_);
      }
  
      return sum_pd_;
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDstMemoryFromPrimitive(void* ptr) {
      return this->AcquireMemoryFromPrimitive(sum_pd_->dst_desc(), ptr,
                                              "@dst_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireSecondSrcMemory(
        const mkldnn::memory::desc& md, void* ptr) {
      return this->AcquireMemory(md, ptr, "@user_src2_mem_p");
    }
  
    std::shared_ptr<mkldnn::sum> AcquireSum() {
      auto prim_key = key_ + "@sum_p";
      auto sum_p =
          std::static_pointer_cast<mkldnn::sum>(dev_ctx_.GetBlob(prim_key));
      if (sum_p == nullptr) {
        sum_p = std::make_shared<mkldnn::sum>(*sum_pd_);
        dev_ctx_.SetBlob(prim_key, sum_p);
      }
      return sum_p;
    }
  
   private:
    std::shared_ptr<mkldnn::sum::primitive_desc> sum_pd_;
  };
  
  template <typename T>
  class ActivationMKLDNNHandler
      : public MKLDNNHandlerT<T, mkldnn::eltwise_forward,
                              mkldnn::eltwise_backward> {
   public:
    ActivationMKLDNNHandler(const std::vector<int64_t>& dims,
                            mkldnn::algorithm algorithm, float alpha, float beta,
                            const MKLDNNMemoryFormat fmt,
                            const platform::MKLDNNDeviceContext& dev_ctx,
                            platform::Place cpu_place,
                            const std::string& unique_name)
  
        : platform::MKLDNNHandlerT<T, mkldnn::eltwise_forward,
                                   mkldnn::eltwise_backward>(
              dev_ctx, dev_ctx.GetEngine(), cpu_place,
              platform::CreateKey(dims, "a", algorithm, unique_name)) {
      auto md = mkldnn::memory::desc(dims, platform::MKLDNNGetDataType<T>(), fmt);
  
      this->AcquireForwardPrimitiveDescriptor(mkldnn::prop_kind::forward_training,
                                              algorithm, md, alpha, beta);
    }
  
    ActivationMKLDNNHandler(const std::vector<int64_t>& dims,
                            mkldnn::algorithm algorithm, float alpha, float beta,
                            const MKLDNNMemoryFormat fmt,
                            const MKLDNNMemoryFormat diff_fmt,
                            const platform::MKLDNNDeviceContext& dev_ctx,
                            platform::Place cpu_place,
                            const std::string& unique_name)
  
        : platform::MKLDNNHandlerT<T, mkldnn::eltwise_forward,
                                   mkldnn::eltwise_backward>(
              dev_ctx, dev_ctx.GetEngine(), cpu_place,
              platform::CreateKey(dims, "a", algorithm, unique_name)) {
      auto diff_dst_md = platform::MKLDNNMemDesc(
          dims, platform::MKLDNNGetDataType<T>(), diff_fmt);
      auto src_md =
          platform::MKLDNNMemDesc(dims, platform::MKLDNNGetDataType<T>(), fmt);
  
      this->AcquireBackwardPrimitiveDescriptor(algorithm, diff_dst_md, src_md,
                                               alpha, beta);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireBackwardSrcMemory(
        const framework::Tensor* input) {
      const T* input_data = input->data<T>();
      return this->AcquireMemoryFromPrimitive(this->bwd_pd_->src_desc(),
                                              to_void_cast<T>(input_data),
                                              "@bwd-src_mem_p");
    }
  };
  
  template <typename T>
  class LRNMKLDNNHandler
      : public MKLDNNHandlerT<T, mkldnn::lrn_forward, mkldnn::lrn_backward> {
   public:
    LRNMKLDNNHandler(const paddle::framework::ExecutionContext& ctx,
                     const platform::MKLDNNDeviceContext& dev_ctx,
                     const mkldnn::engine mkldnn_engine,
                     platform::Place cpu_place, const Tensor* input,
                     const std::string& unique_name)
  
        : platform::MKLDNNHandlerT<T, mkldnn::lrn_forward, mkldnn::lrn_backward>(
              dev_ctx, mkldnn_engine, cpu_place,
              platform::CreateKey(framework::vectorize(input->dims()),
                                  unique_name)) {
      if (!this->isCached()) {
        const int n = ctx.Attr<int>("n");
        // MKL-DNN implements LRN in a caffe way:
        // http://caffe.berkeleyvision.org/tutorial/layers/lrn.html
        // Where sum of squares is divided by size of normalization window
        // this is not the case for PaddlePaddle LRN.
        // Hence we need to compensate for this diffrence by
        // multipliing alpha by size of window(n)
        const float alpha = ctx.Attr<float>("alpha") * static_cast<float>(n);
        const float beta = ctx.Attr<float>("beta");
        const float k = ctx.Attr<float>("k");
        bool is_test = ctx.Attr<bool>("is_test");
  
        auto dims = paddle::framework::vectorize(input->dims());
  
        auto src_md = mkldnn::memory::desc(dims, platform::MKLDNNGetDataType<T>(),
                                           input->format());
  
        this->AcquireForwardPrimitiveDescriptor(
            is_test ? mkldnn::prop_kind::forward_inference
                    : mkldnn::prop_kind::forward_training,
            mkldnn::algorithm::lrn_across_channels, src_md, n, alpha, beta, k);
      }
    }
  
    LRNMKLDNNHandler(const std::vector<int64_t>& dims, const int n,
                     const float alpha, const float beta, const float k,
                     const MKLDNNMemoryFormat fmt,
                     const MKLDNNMemoryFormat diff_fmt,
                     const platform::MKLDNNDeviceContext& dev_ctx,
                     platform::Place cpu_place, const std::string& unique_name)
  
        : platform::MKLDNNHandlerT<T, mkldnn::lrn_forward, mkldnn::lrn_backward>(
              dev_ctx, dev_ctx.GetEngine(), cpu_place,
              platform::CreateKey(dims, unique_name)) {
      auto src_md =
          mkldnn::memory::desc(dims, platform::MKLDNNGetDataType<T>(), fmt);
      auto diff_md =
          mkldnn::memory::desc(dims, platform::MKLDNNGetDataType<T>(), diff_fmt);
  
      this->AcquireBackwardPrimitiveDescriptor(
          mkldnn::algorithm::lrn_across_channels, src_md, diff_md, n, alpha, beta,
          k);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireWorkspaceMemory(
        framework::Tensor* workspace) {
      T* ptr = workspace->mutable_data<T>(
          this->place_, this->fwd_pd_->workspace_desc().get_size());
      return this->AcquireMemoryFromPrimitive(this->fwd_pd_->workspace_desc(),
                                              ptr, "@wrk_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireBackwardWorkspaceMemory(
        const framework::Tensor* workspace) {
      const T* workspace_data = workspace->data<T>();
      return this->AcquireMemoryFromPrimitive(this->fwd_pd_->workspace_desc(),
                                              to_void_cast<T>(workspace_data),
                                              "@bwd-wrk_mem_p");
    }
  };
  
  template <typename T>
  class PoolingMKLDNNHandler : public MKLDNNHandlerT<T, mkldnn::pooling_forward,
                                                     mkldnn::pooling_backward> {
   public:
    PoolingMKLDNNHandler(const paddle::framework::ExecutionContext& ctx,
                         const MKLDNNDeviceContext& dev_ctx,
                         const mkldnn::engine mkldnn_engine,
                         platform::Place cpu_place, const Tensor* input,
                         Tensor* output, const std::string& unique_name)
        : platform::MKLDNNHandlerT<T, mkldnn::pooling_forward,
                                   mkldnn::pooling_backward>(
              dev_ctx, dev_ctx.GetEngine(), cpu_place,
              platform::CreateKey(framework::vectorize(input->dims()),
                                  framework::ToMKLDNNDataType(input->type()),
                                  unique_name)) {
      if (!this->isCached()) {
        PADDLE_ENFORCE_EQ(input->layout(), DataLayout::kMKLDNN,
                          platform::errors::InvalidArgument(
                              "Wrong layout set for Input tensor."));
        PADDLE_ENFORCE_NE(input->format(), MKLDNNMemoryFormat::undef,
                          platform::errors::InvalidArgument(
                              "Wrong format set for Input tensor."));
  
        const std::string pooling_type = ctx.Attr<std::string>("pooling_type");
  
        std::vector<int> ksize_temp = ctx.Attr<std::vector<int>>("ksize");
        std::vector<int64_t> ksize(begin(ksize_temp), end(ksize_temp));
  
        std::vector<int> strides_temp = ctx.Attr<std::vector<int>>("strides");
        std::vector<int64_t> strides(begin(strides_temp), end(strides_temp));
  
        std::vector<int> paddings_temp = ctx.Attr<std::vector<int>>("paddings");
        std::vector<int64_t> paddings(begin(paddings_temp), end(paddings_temp));
  
        const bool global_pooling = ctx.Attr<bool>("global_pooling");
        const std::string padding_algorithm =
            ctx.Attr<std::string>("padding_algorithm");
  
        // Only 2D pooling is supported now
        PADDLE_ENFORCE_EQ(
            ksize.size(), 2,
            platform::errors::InvalidArgument(
                "The ksize must be 2D, i.e. 2D pooling, but received %dD.",
                ksize.size()));
        PADDLE_ENFORCE_EQ(
            pooling_type == "max" || pooling_type == "avg", true,
            platform::errors::InvalidArgument(
                "The pooling_type must be 'max' or 'avg', but received %s.",
                pooling_type));
        PADDLE_ENFORCE_EQ(
            input->dims().size(), 4,
            platform::errors::InvalidArgument(
                "Input dim must be with 4, i.e. NCHW, but received %d.",
                input->dims().size()));
  
        const auto input_dims = input->dims();
        framework::DDim data_dims =
            framework::slice_ddim(input_dims, 2, input_dims.size());
  
        if (global_pooling) {
          operators::UpdateKsize(&ksize, data_dims);
        }
  
        operators::UpdatePadding(&paddings, global_pooling, 0, padding_algorithm,
                                 data_dims, strides, ksize);
  
        const auto src_tz = paddle::framework::vectorize(input->dims());
        const auto dst_tz = paddle::framework::vectorize(output->dims());
  
        const auto is_test = ctx.Attr<bool>("is_test");
  
        const auto dt = framework::ToMKLDNNDataType(input->type());
        const auto fmt = input->format();
  
        const auto exclude_padding = ctx.Attr<bool>("exclusive");
  
        const auto src_md = mkldnn::memory::desc(src_tz, dt, fmt);
        /* create memory descriptor for pooling without specified format
         * ('any') which lets a primitive (pooling in this case) choose
         * the memory format preferred for best performance
         */
  
        const auto dst_md =
            platform::MKLDNNMemDesc(dst_tz, dt, MKLDNNMemoryFormat::any);
  
        auto mkldnn_paddings = ToMkldnnPadding(paddings);
  
        const bool ceil_mode = ctx.Attr<bool>("ceil_mode");
  
        if (ceil_mode) {
          CorrectOutputSize(src_tz, dst_tz, ksize, paddings, strides,
                            mkldnn_paddings[1]);
        }
        this->AcquireForwardPrimitiveDescriptor(
            is_test ? mkldnn::prop_kind::forward_inference
                    : mkldnn::prop_kind::forward_training,
            pooling_type == "max"
                ? mkldnn::algorithm::pooling_max
                : (exclude_padding
                       ? mkldnn::algorithm::pooling_avg_exclude_padding
                       : mkldnn::algorithm::pooling_avg_include_padding),
            src_md, dst_md, strides, ksize, mkldnn_paddings[0],
            mkldnn_paddings[1]);
      }
    }
  
    PoolingMKLDNNHandler(
        const std::vector<int64_t>& diff_dst_dims,
        const std::vector<int64_t>& diff_src_dims,
        const std::vector<int64_t>& ksize, const std::vector<int64_t>& strides,
        const std::vector<int64_t>& paddings, const std::string& pooling_type,
        bool ceil_mode, const MKLDNNMemoryFormat fmt,
        const MKLDNNMemoryFormat diff_dst_fmt, mkldnn::memory::data_type dt,
        const platform::MKLDNNDeviceContext& dev_ctx, platform::Place cpu_place,
        const std::string& unique_name, bool exclude_padding)
        : platform::MKLDNNHandlerT<T, mkldnn::pooling_forward,
                                   mkldnn::pooling_backward>(
              dev_ctx, dev_ctx.GetEngine(), cpu_place,
              platform::CreateKey(diff_src_dims, dt, unique_name)) {
      auto diff_dst_md = mkldnn::memory::desc(
          diff_dst_dims, platform::MKLDNNGetDataType<T>(), diff_dst_fmt);
      auto diff_src_md =
          mkldnn::memory::desc(diff_src_dims, platform::MKLDNNGetDataType<T>(),
                               MKLDNNMemoryFormat::any);
  
      auto mkldnn_paddings = ToMkldnnPadding(paddings);
  
      this->AcquireBackwardPrimitiveDescriptor(
          pooling_type == "max"
              ? mkldnn::algorithm::pooling_max
              : (exclude_padding
                     ? mkldnn::algorithm::pooling_avg_exclude_padding
                     : mkldnn::algorithm::pooling_avg_include_padding),
          diff_src_md, diff_dst_md, strides, ksize, mkldnn_paddings[0],
          mkldnn_paddings[1]);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireWorkspaceMemory(void) {
      mkldnn::memory::desc workspace_md = this->fwd_pd_->workspace_desc();
      // Pooling PD has to be passed to Grad op that
      // may be executed by diffrent thread, hence
      // for that one we use key that does not contain TID
      auto local_key = this->key_common_ + "@workspace";
      auto mem_p = std::static_pointer_cast<mkldnn::memory>(
          this->dev_ctx_.GetBlob(local_key));
      if (mem_p == nullptr) {
        static std::mutex acquire_barrier;
        std::lock_guard<std::mutex> block_threads_until_finish_this_job(
            acquire_barrier);
        mem_p = std::static_pointer_cast<mkldnn::memory>(
            this->dev_ctx_.GetBlob(local_key));
        if (mem_p == nullptr) {
          mem_p = std::make_shared<mkldnn::memory>(workspace_md, this->engine_);
          this->dev_ctx_.SetBlob(local_key, mem_p);
        }
      }
      return mem_p;
    }
  
   private:
    static inline int ComputeCeiledOutput(int input_size, int kernel_size,
                                          int padding, int stride) {
      return (input_size - kernel_size + 2 * padding) / stride + 1;
    }
  
    static inline void CorrectOutputSize(
        const std::vector<int64_t>& src_tz, const std::vector<int64_t>& dst_tz,
        const std::vector<int64_t>& kernel_size,
        const std::vector<int64_t>& paddings, const std::vector<int64_t>& strides,
        std::vector<int64_t>& right_bot_padding) {  // NOLINT
      for (size_t i = 0; i < right_bot_padding.size(); i++) {
        int desired_size = ComputeCeiledOutput(src_tz[i + 2], kernel_size[i],
                                               paddings[i], strides[i]);
        if (desired_size != dst_tz[i + 2]) {
          right_bot_padding[i] += strides[i] - 1;
        }
      }
    }
  };
  
  template <typename T>
  class TransposeMKLDNNHandler : public MKLDNNHandler {
   public:
    TransposeMKLDNNHandler(std::vector<int64_t>& dims,  // NOLINT
                           std::vector<int>& axis,      // NOLINT
                           const platform::MKLDNNDeviceContext& dev_ctx,
                           mkldnn::engine engine, const std::string& base_key)
        : platform::MKLDNNHandler(dev_ctx, engine, base_key),
          dims_(dims),
          axis_(axis),
          logical_axis_(dims.size(), 0) {}
  
    std::shared_ptr<mkldnn::memory> AcquireSrcMemory(
        const MKLDNNMemoryFormat& fmt, void* ptr) {
      auto local_key = key_ + "@user_src_mem_p";
      auto mem_p =
          std::static_pointer_cast<mkldnn::memory>(dev_ctx_.GetBlob(local_key));
      if (mem_p == nullptr) {
        // Make memory descriptor using input format, unless it
        // cannot be trusted (nchw) then make up memory fmt manually
        for (size_t i = 0; i < logical_axis_.size(); ++i) {
          logical_axis_[i] = i;
        }
  
        auto src_md = fmt != MKLDNNMemoryFormat::nchw
                          ? platform::MKLDNNMemDesc(
                                dims_, platform::MKLDNNGetDataType<T>(), fmt)
                          : Axis2MemoryDesc(dims_, logical_axis_);
        mem_p = std::make_shared<mkldnn::memory>(src_md, engine_, ptr);
        dev_ctx_.SetBlob(local_key, mem_p);
      } else {
        mem_p->set_data_handle(ptr);
      }
      return mem_p;
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDstMemory(framework::Tensor* output,
                                                     platform::Place place) {
      auto local_key = key_ + "@user_dst_mem_p";
      auto mem_p =
          std::static_pointer_cast<mkldnn::memory>(dev_ctx_.GetBlob(local_key));
      if (mem_p == nullptr) {
        auto dst_md = Axis2MemoryDesc(dims_, axis_);
  
        auto dst_data = output->mutable_data<T>(place, dst_md.get_size());
  
        mem_p = std::make_shared<mkldnn::memory>(dst_md, engine_, dst_data);
        dev_ctx_.SetBlob(local_key, mem_p);
      } else {
        auto dst_data = output->mutable_data<T>(place);
        mem_p->set_data_handle(dst_data);
      }
      return mem_p;
    }
  
    std::shared_ptr<mkldnn::reorder> AcquireTranspose(
        std::shared_ptr<mkldnn::memory> dst_memory_p,
        std::shared_ptr<mkldnn::memory> src_memory_p) {
      auto prim_key = key_ + "@transpose_p";
      auto transpose_p =
          std::static_pointer_cast<mkldnn::reorder>(dev_ctx_.GetBlob(prim_key));
      if (transpose_p == nullptr) {
        transpose_p =
            std::make_shared<mkldnn::reorder>(*(src_memory_p), *(dst_memory_p));
        dev_ctx_.SetBlob(prim_key, transpose_p);
      }
      return transpose_p;
    }
  
   protected:
    mkldnn::memory::desc Axis2MemoryDesc(std::vector<int64_t>& nchw_tz,  // NOLINT
                                         std::vector<int>& axis          // NOLINT
                                         ) {
      size_t ndims = axis.size();
  
      std::vector<int64_t> strides(ndims);
      unsigned int total_stride = 1;
      for (int i = ndims - 1; i >= 0; --i) {
        strides[axis[i]] = total_stride;
        total_stride *= nchw_tz[axis[i]];
      }
      mkldnn::memory::desc mem_d(nchw_tz, platform::MKLDNNGetDataType<T>(),
                                 strides);
  
      return mem_d;
    }
  
   private:
    std::vector<int64_t> dims_;
    std::vector<int> axis_;
    std::vector<int> logical_axis_;
  };
  
  class ReorderMKLDNNHandler : public MKLDNNHandler {
   public:
    ReorderMKLDNNHandler(std::vector<int64_t>& dims,  // NOLINT
                         framework::proto::VarType::Type vtype,
                         mkldnn::memory::data_type dtype,
                         const platform::MKLDNNDeviceContext& dev_ctx,
                         mkldnn::engine engine, const std::string& base_key)
        : platform::MKLDNNHandler(dev_ctx, engine, base_key),
          dims_(dims),
          vtype_(vtype),
          dtype_(dtype) {}
  
    std::shared_ptr<mkldnn::memory> AcquireSrcMemory(
        const MKLDNNMemoryFormat& fmt, void* ptr) {
      return this->AcquireMemory(dims_, dtype_, fmt, ptr, "@user_src_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDstMemory(
        framework::Tensor* output, const MKLDNNMemoryFormat& fmt,
        platform::Place place) {
      auto local_key = key_ + "@user_dst_mem_p";
      auto mem_p =
          std::static_pointer_cast<mkldnn::memory>(dev_ctx_.GetBlob(local_key));
      if (mem_p == nullptr) {
        auto dst_md = platform::MKLDNNMemDesc(dims_, dtype_, fmt);
  
        auto dst_data = output->mutable_data(place, vtype_);
  
        mem_p = std::make_shared<mkldnn::memory>(dst_md, engine_, dst_data);
        dev_ctx_.SetBlob(local_key, mem_p);
      } else {
        auto dst_data = output->mutable_data(place, vtype_);
        mem_p->set_data_handle(dst_data);
      }
      return mem_p;
    }
  
    std::shared_ptr<mkldnn::reorder> AcquireReorder(
        std::shared_ptr<mkldnn::memory> dst_memory_p,
        std::shared_ptr<mkldnn::memory> src_memory_p) {
      auto prim_key = key_ + "@reorder_p";
      auto reorder_p =
          std::static_pointer_cast<mkldnn::reorder>(dev_ctx_.GetBlob(prim_key));
      if (reorder_p == nullptr) {
        reorder_p =
            std::make_shared<mkldnn::reorder>(*(src_memory_p), *(dst_memory_p));
        dev_ctx_.SetBlob(prim_key, reorder_p);
      }
      return reorder_p;
    }
  
   private:
    std::vector<int64_t> dims_;
    framework::proto::VarType::Type vtype_;
    mkldnn::memory::data_type dtype_;
  };
  
  template <typename T>
  struct convolutional_algorithm;
  
  template <>
  struct convolutional_algorithm<mkldnn::convolution_forward> {
    static constexpr mkldnn::algorithm T = mkldnn::algorithm::convolution_direct;
  };
  
  template <>
  struct convolutional_algorithm<mkldnn::deconvolution_forward> {
    static constexpr mkldnn::algorithm T =
        mkldnn::algorithm::deconvolution_direct;
  };
  
  template <class forward_t, class backward_data_t, class backward_weights_t>
  class ConvMKLDNNTemplateHandler : public MKLDNNHandler {
   public:
    ConvMKLDNNTemplateHandler(const platform::MKLDNNDeviceContext& dev_ctx,
                              mkldnn::engine engine, const std::string& base_key)
        : platform::MKLDNNHandler(dev_ctx, engine, base_key) {}
  
    // TODO(jczaja): remove after conv int8 is adapted
    ConvMKLDNNTemplateHandler(
        std::shared_ptr<typename forward_t::primitive_desc> conv_pd,
        const platform::MKLDNNDeviceContext& dev_ctx, mkldnn::engine engine,
        const std::string& base_key)
        : platform::MKLDNNHandler(dev_ctx, engine, base_key) {
      conv_pd_ = conv_pd;
    }
  
    ConvMKLDNNTemplateHandler(
        std::shared_ptr<typename forward_t::primitive_desc> conv_pd,
        std::shared_ptr<typename backward_data_t::primitive_desc>
            conv_bwd_data_pd,
        std::shared_ptr<typename backward_weights_t::primitive_desc>
            conv_bwd_weights_pd,
        const platform::MKLDNNDeviceContext& dev_ctx, mkldnn::engine engine,
        const std::string& base_key)
        : platform::MKLDNNHandler(dev_ctx, engine, base_key),
          conv_pd_(conv_pd),
          conv_bwd_weights_pd_(conv_bwd_weights_pd),
          conv_bwd_data_pd_(conv_bwd_data_pd) {
      // If we are in Grad operatgor then update a key with BWD suffix to
      // distinguish from FWD memory primitives
      key_ += "-BWD";
    }
  
    size_t GetDstMemorySize() const { return conv_pd_->dst_desc().get_size(); }
  
    MKLDNNMemoryFormat GetDstFormat() const {
      return paddle::platform::GetMKLDNNFormat(conv_pd_->dst_desc());
    }
  
    size_t GetDiffWeightsMemorySize() const {
      return conv_bwd_weights_pd_->diff_weights_desc().get_size();
    }
  
    size_t GetDiffSourceMemorySize() const {
      return conv_bwd_data_pd_->diff_src_desc().get_size();
    }
  
    std::shared_ptr<mkldnn::memory> AcquireSrcMemoryFromWeightsPrimitive(
        const std::shared_ptr<mkldnn::memory> user_memory_p,
        std::vector<mkldnn::primitive>& pipeline) {  // NOLINT
      auto src_pd = conv_bwd_weights_pd_->src_desc();
      auto user_pd = user_memory_p->get_desc();
      return this->AcquireMemory(src_pd, user_pd, user_memory_p,
                                 "@weights-src_mem_p", pipeline);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDiffDstMemoryFromWeightsPrimitive(
        const std::shared_ptr<mkldnn::memory> user_memory_p,
        std::vector<mkldnn::primitive>& pipeline) {  // NOLINT
      auto diff_dst_pd = conv_bwd_weights_pd_->diff_dst_desc();
      auto user_pd = user_memory_p->get_desc();
      return this->AcquireMemory(diff_dst_pd, user_pd, user_memory_p,
                                 "@weights-diff_dst_mem_p", pipeline);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDiffWeightsMemoryFromWeightsPrimitive(
        void* ptr) {
      return this->AcquireMemoryFromPrimitive(
          conv_bwd_weights_pd_->diff_weights_desc(), ptr, "@diff_weights_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDiffDstMemoryFromDataPrimitive(
        const std::shared_ptr<mkldnn::memory> user_memory_p,
        std::vector<mkldnn::primitive>& pipeline) {  // NOLINT
      auto diff_dst_pd = conv_bwd_data_pd_->diff_dst_desc();
      auto user_pd = user_memory_p->get_desc();
      return this->AcquireMemory(diff_dst_pd, user_pd, user_memory_p,
                                 "@data-diff_dst_mem_p", pipeline);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireWeightsMemoryFromDataPrimitive(
        const std::shared_ptr<mkldnn::memory> user_weights_memory_p,
        std::vector<mkldnn::primitive>& pipeline) {  // NOLINT
      auto weights_pd = conv_bwd_data_pd_->weights_desc();
      auto user_pd = user_weights_memory_p->get_desc();
      return this->AcquireMemory(weights_pd, user_pd, user_weights_memory_p,
                                 "@data-weights_mem_p", pipeline);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireResidualDataMemory(
        const mkldnn::memory::desc& md, void* ptr) {
      return this->AcquireMemory(md, ptr, "@user_residual_data_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDstMemoryFromResidualDataMemory(
        const std::shared_ptr<mkldnn::memory>& user_residual_memory_p,
        void* dst_ptr,
        std::vector<mkldnn::primitive>& pipeline) {  // NOLINT
      return this->AcquireMemory(user_residual_memory_p,
                                 this->AcquireDstMemoryFromPrimitive(dst_ptr),
                                 "@residual_data_mem_p", pipeline);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDiffSrcMemoryFromDataPrimitive(
        void* ptr) {
      return this->AcquireMemoryFromPrimitive(conv_bwd_data_pd_->diff_src_desc(),
                                              ptr, "@diff_src_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireDstMemoryFromPrimitive(void* ptr) {
      return this->AcquireMemoryFromPrimitive(conv_pd_->dst_desc(), ptr,
                                              "@dst_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireSrcMemoryFromPrimitive(
        const std::shared_ptr<mkldnn::memory> user_memory_p,
        std::vector<mkldnn::primitive>& pipeline) {  // NOLINT
      auto src_pd = conv_pd_->src_desc();
      auto user_pd = user_memory_p->get_desc();
      return this->AcquireMemory(src_pd, user_pd, user_memory_p, "@src_mem_p",
                                 pipeline);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireWeightsMemory(
        const mkldnn::memory::desc& md, void* ptr,
        user_function custom_func = {}) {
      return this->AcquireMemory(md, ptr, "@user_weights_mem_p", custom_func);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireBiasMemory(
        const mkldnn::memory::desc& md, void* ptr) {
      return this->AcquireMemory(md, ptr, "@user_bias_mem_p");
    }
  
    std::shared_ptr<mkldnn::memory> AcquireWeightsMemoryFromPrimitive(
        const std::shared_ptr<mkldnn::memory> user_weights_memory_p,
        std::vector<mkldnn::primitive>& pipeline,  // NOLINT
        bool is_persistent = false, bool is_INT8 = false,
        std::vector<float> scale_data = {1.0f}, int mask = 0) {
      auto user_weights_pd = user_weights_memory_p->get_desc();
      auto weights_pd = conv_pd_->weights_desc();
      return this->AcquireMemory(
          weights_pd, user_weights_pd, user_weights_memory_p, "@weights_mem_p",
          pipeline, is_persistent, is_INT8, scale_data, mask);
    }
  
    std::shared_ptr<mkldnn::memory> AcquireBiasMemoryFromPrimitive(
        const std::shared_ptr<mkldnn::memory> user_bias_memory_p,
        std::vector<mkldnn::primitive>& pipeline,  // NOLINT
        bool is_persistent = false, bool is_INT8 = false,
        std::vector<float> scale_data = {1.0f},
        int mask = 0) {  // NOLINT
      auto user_bias_pd = user_bias_memory_p->get_desc();
      auto bias_pd = conv_pd_->bias_desc();
      return this->AcquireMemory(bias_pd, user_bias_pd, user_bias_memory_p,
                                 "@bias_mem_p", pipeline, is_persistent, is_INT8,
                                 scale_data, mask);
    }
  
    mkldnn::primitive_attr CreatePostOps(
        std::string fuse_activation, float fuse_alpha, float fuse_beta,
        bool fuse_residual_conn, const std::vector<float> output_shift_scale = {},
        float sum_scale = 1.0f) const {
      mkldnn::primitive_attr conv_attr;
      mkldnn::post_ops post_operations;
      if (output_shift_scale.size() > 0) {
        int mask = output_shift_scale.size() > 1 ? 1 << 1 : 0;
        conv_attr.set_output_scales(mask, output_shift_scale);
      }
      // Fusion with Elementwise layer relies on adding a sum post-operation with
      // the scale parameter. It is assumed that when fuse_residual_connection is
      // true, the output tensor contains the data coming from residual
      // connection. The result of this post_op is:
      // Output = scale * Output + Conv_Out.
      if (fuse_residual_conn) {
        post_operations.append_sum(sum_scale);
      }
      // Fusion with ReLU layer is executed through the PostOps feature. Create a
      // PostOps object and configure it to execute an eltwise relu operation.
      if (fuse_activation == "relu" || fuse_activation == "leaky_relu") {
        constexpr float scale = 1.0f;
        post_operations.append_eltwise(scale, mkldnn::algorithm::eltwise_relu,
                                       fuse_alpha, fuse_beta);
      } else if (fuse_activation == "relu6") {
        constexpr float scale = 1.0f;
        post_operations.append_eltwise(scale,
                                       mkldnn::algorithm::eltwise_bounded_relu,
                                       fuse_alpha, fuse_beta);
      } else if (fuse_activation == "swish") {
        constexpr float scale = 1.0f;
        post_operations.append_eltwise(scale, mkldnn::algorithm::eltwise_swish,
                                       fuse_alpha, fuse_beta);
      }
      conv_attr.set_post_ops(post_operations);
      return conv_attr;
    }
  
    std::shared_ptr<typename forward_t::primitive_desc>
    AcquireConvolutionPrimitiveDescriptor(
        const mkldnn::memory::desc& src, const mkldnn::memory::desc& weights,
        boost::optional<const mkldnn::memory::desc&> bias,
        const mkldnn::memory::desc& dst, const std::vector<int64_t>& strides,
        const std::vector<int64_t>& paddings, const mkldnn::engine& engine,
        const std::string& fuse_activation, float fuse_alpha, float fuse_beta,
        const bool fuse_residual_conn, mkldnn::prop_kind fwd_prop_kind,
        const std::vector<float> output_shift_scale = {},
        const float sum_scale = 1.0f) {
      // Conv PD has to be passed to Grad op that
      // may be exxecuted by diffrent thread, hence
      // for that one we use key that does not contain TID
      const std::string key_conv_pd = key_common_ + "@conv_pd";
  
      conv_pd_ = std::static_pointer_cast<typename forward_t::primitive_desc>(
          dev_ctx_.GetBlob(key_conv_pd));
  
      if (conv_pd_ == nullptr) {
        static std::mutex acquire_barrier;
        std::lock_guard<std::mutex> block_threads_until_finish_this_job(
            acquire_barrier);
  
        conv_pd_ = std::static_pointer_cast<typename forward_t::primitive_desc>(
            dev_ctx_.GetBlob(key_conv_pd));
        if (conv_pd_ == nullptr) {
          mkldnn::memory::dims stride_dims = strides;
  
          auto mkldnn_paddings = ToMkldnnPadding(paddings);
  
          auto conv_desc =
              bias ? typename forward_t::desc(
                         fwd_prop_kind, convolutional_algorithm<forward_t>::T,
                         src, weights, *bias, dst, stride_dims,
                         mkldnn_paddings[0], mkldnn_paddings[1])
                   : typename forward_t::desc(
                         fwd_prop_kind, convolutional_algorithm<forward_t>::T,
                         src, weights, dst, stride_dims, mkldnn_paddings[0],
                         mkldnn_paddings[1]);
  
          mkldnn::primitive_attr conv_attr =
              CreatePostOps(fuse_activation, fuse_alpha, fuse_beta,
                            fuse_residual_conn, output_shift_scale, sum_scale);
  
          conv_pd_.reset(new typename forward_t::primitive_desc(
              conv_desc, conv_attr, engine));
          // Save conv_pd/src_memory/weights_memory for backward pass
          dev_ctx_.SetBlob(key_conv_pd, conv_pd_);
        }
      }
  
      return conv_pd_;
    }
  
    std::shared_ptr<forward_t> AcquireConvolution() {
      auto prim_key = key_ + "@conv_p";
      auto conv_p =
          std::static_pointer_cast<forward_t>(dev_ctx_.GetBlob(prim_key));
      if (conv_p == nullptr) {
        conv_p = std::make_shared<forward_t>(*conv_pd_);
  
        dev_ctx_.SetBlob(prim_key, conv_p);
      }
      return conv_p;
    }
  
    std::shared_ptr<backward_weights_t> AcquireConvolutionBackwardWeights() {
      auto prim_key = key_ + "@conv_bwd_weights_p";
      auto conv_bwd_weights_p = std::static_pointer_cast<backward_weights_t>(
          dev_ctx_.GetBlob(prim_key));
      if (conv_bwd_weights_p == nullptr) {
        // create backward conv primitive for weights
        conv_bwd_weights_p =
            std::make_shared<backward_weights_t>(*conv_bwd_weights_pd_);
        dev_ctx_.SetBlob(prim_key, conv_bwd_weights_p);
      }
      return conv_bwd_weights_p;
    }
  
    std::shared_ptr<backward_data_t> AcquireConvolutionBackwardData() {
      auto prim_key = key_ + "@conv_bwd_data_p";
      auto conv_bwd_data_p =
          std::static_pointer_cast<backward_data_t>(dev_ctx_.GetBlob(prim_key));
      if (conv_bwd_data_p == nullptr) {
        conv_bwd_data_p = std::make_shared<backward_data_t>(*conv_bwd_data_pd_);
        dev_ctx_.SetBlob(prim_key, conv_bwd_data_p);
      }
      return conv_bwd_data_p;
    }
  
   private:
    std::shared_ptr<typename forward_t::primitive_desc> conv_pd_;
    std::shared_ptr<typename backward_weights_t::primitive_desc>
        conv_bwd_weights_pd_;
    std::shared_ptr<typename backward_data_t::primitive_desc> conv_bwd_data_pd_;
  };
  
  using ConvMKLDNNHandler =
      ConvMKLDNNTemplateHandler<mkldnn::convolution_forward,
                                mkldnn::convolution_backward_data,
                                mkldnn::convolution_backward_weights>;
  
  using ConvTransposeMKLDNNHandler =
      ConvMKLDNNTemplateHandler<mkldnn::deconvolution_forward,
                                mkldnn::deconvolution_backward_data,
                                mkldnn::deconvolution_backward_weights>;
  
  template <typename T>
  static std::shared_ptr<mkldnn::memory> SetDstMemory(
      const framework::ExecutionContext& ctx, framework::Tensor* output,
      const std::shared_ptr<ConvMKLDNNHandler>& handler) {
    T* output_data =
        output->mutable_data<T>(ctx.GetPlace(), handler->GetDstMemorySize());
    std::shared_ptr<mkldnn::memory> dst_memory_p =
        handler->AcquireDstMemoryFromPrimitive(to_void_cast<T>(output_data));
    return dst_memory_p;
  }
  
  template <typename T>
  static std::shared_ptr<mkldnn::memory> SetDstMemory(
      const framework::ExecutionContext& ctx, framework::Tensor* output,
      const framework::Tensor* residual_param,
      const mkldnn::memory::desc& user_residual_md,
      const std::shared_ptr<ConvMKLDNNHandler>& handler,
      std::vector<mkldnn::primitive>* pipeline) {
    const T* residual_param_data = residual_param->data<T>();
    PADDLE_ENFORCE_NOT_NULL(
        residual_param_data,
        platform::errors::PreconditionNotMet("Residual parameter is required for "
                                             "the DNNL conv+elementwise_add "
                                             "fusion, but now it is missing."));
    std::shared_ptr<mkldnn::memory> user_residual_memory_p =
        handler->AcquireResidualDataMemory(user_residual_md,
                                           to_void_cast<T>(residual_param_data));
    T* output_data = output->mutable_data<T>(ctx.GetPlace());
    std::shared_ptr<mkldnn::memory> dst_memory_p =
        handler->AcquireDstMemoryFromResidualDataMemory(
            user_residual_memory_p, to_void_cast<T>(output_data), *pipeline);
    return dst_memory_p;
  }
  
  template <typename T>
  static void SetDstMemoryHandler(
      const framework::ExecutionContext& ctx, framework::Tensor* output,
      const std::shared_ptr<ConvMKLDNNHandler>& handler,
      std::shared_ptr<mkldnn::memory> dst_memory_p) {
    T* output_data =
        output->mutable_data<T>(ctx.GetPlace(), handler->GetDstMemorySize());
    dst_memory_p->set_data_handle(to_void_cast<T>(output_data));
  }
  
  template <typename T>
  static void SetDstMemoryQuantized(
      const framework::ExecutionContext& ctx, framework::Tensor* output,
      std::vector<int64_t> dst_tz, const mkldnn::engine& engine,
      std::shared_ptr<mkldnn::memory::desc>& dst_md,  // NOLINT
      std::shared_ptr<mkldnn::memory>& dst_memory,    // NOLINT
      MKLDNNMemoryFormat output_format) {
    T* output_data = output->mutable_data<T>(ctx.GetPlace());
    const size_t dst_dims = dst_tz.size();
    MKLDNNMemoryFormat dst_fmt;
    PADDLE_ENFORCE_LE(dst_dims, 5, platform::errors::InvalidArgument(
                                       "Dst memory for quantization can not have "
                                       "dims > 5. But received dst_dims is %d.",
                                       dst_dims));
    dst_fmt = platform::MKLDNNFormatForSize(dst_dims, output_format);
  
    auto tmp_dst_md = platform::MKLDNNMemDesc(
        {dst_tz}, paddle::framework::ToMKLDNNDataType(
                      framework::DataTypeTrait<T>::DataType()),
        dst_fmt);
    dst_md.reset(new mkldnn::memory::desc(tmp_dst_md));
    dst_memory.reset(
        new mkldnn::memory(*dst_md, engine, to_void_cast<T>(output_data)));
  }
  
  }  // namespace platform
  }  // namespace paddle
  