[PHI] Migrate sgd and stack oneDNN kernels (PaddlePaddle#46374)

* Convert slice+grad oneDNN fluid kernels to PHI

* Change mutable_data to Alloc

* Refactor licences

paddle/phi/backends/CMakeLists.txt

@@ -21,6 +21,7 @@ endif()
 
 if(WITH_MKLDNN)
   list(APPEND BACKENDS_SRCS onednn/onednn_context.cc)
+  list(APPEND BACKENDS_SRCS onednn/axpy_handler.cc)
   list(APPEND BACKENDS_DEPS mkldnn)
 endif()
 

paddle/phi/backends/onednn/axpy_handler.cc

@@ -0,0 +1,133 @@
+// Copyright (c) 2022 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/phi/backends/onednn/axpy_handler.h"
+
+#include <cinttypes>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "paddle/phi/backends/onednn/onednn_helper.h"
+
+namespace phi {
+namespace funcs {
+
+template <typename T>
+class AXPYHandler {
+ public:
+  AXPYHandler(const dnnl::engine onednn_engine, int n, float alpha) {
+    OneDNNContext::tls().log_lib_version();
+    auto md = dnnl::memory::desc(
+        {n}, OneDNNGetDataType<T>(), dnnl::memory::format_tag::x);
+    src_mem_ = dnnl::memory(md, onednn_engine, DNNL_MEMORY_NONE);
+    dst_mem_ = dnnl::memory(md, onednn_engine, DNNL_MEMORY_NONE);
+    dnnl::primitive_attr reorder_attr;
+    dnnl::post_ops post_operations;
+    if (alpha != 1.f) {
+      std::vector<float> scales(1, alpha);
+      reorder_attr.set_output_scales(0, scales);
+    }
+    post_operations.append_sum(1.0f);
+
+    reorder_attr.set_post_ops(post_operations);
+    reorder_p_ = dnnl::reorder(src_mem_, dst_mem_, reorder_attr);
+  }
+
+  dnnl::memory &AcquireSrcMemory(const T *x) {
+    src_mem_.set_data_handle(to_void_cast<T>(x));
+    return src_mem_;
+  }
+
+  dnnl::memory &AcquireDstMemory(T *y) {
+    dst_mem_.set_data_handle(y);
+    return dst_mem_;
+  }
+
+  const dnnl::reorder &AcquireReorder() { return reorder_p_; }
+
+ private:
+  dnnl::memory src_mem_;
+  dnnl::memory dst_mem_;
+  dnnl::reorder reorder_p_;
+};
+
+template class AXPYHandler<float>;
+template class AXPYHandler<phi::dtype::bfloat16>;
+
+template <typename T>
+static void naive_axpy(int n, T alpha, const T *x, T *y) {
+  while (n-- > 0) {
+    *y += alpha * *x;
+    ++y;
+    ++x;
+  }
+}
+
+template <typename T>
+class OneDNNAXPYHandler<T>::Impl {
+ public:
+  Impl(int64_t n, T alpha, const dnnl::engine onednn_engine);
+  void operator()(const T *x, T *y);
+
+ private:
+  std::unique_ptr<AXPYHandler<T>> handler_;
+  int64_t n_;
+  T alpha_;
+};
+
+template <typename T>
+OneDNNAXPYHandler<T>::Impl::Impl(int64_t n,
+                                 T alpha,
+                                 const dnnl::engine onednn_engine)
+    : n_{n}, alpha_{alpha} {
+  handler_ = std::make_unique<AXPYHandler<T>>(
+      onednn_engine, n, static_cast<float>(alpha));
+}
+
+template <typename T>
+void OneDNNAXPYHandler<T>::Impl::operator()(const T *x, T *y) {
+  if (this->n_ < 100) {
+    naive_axpy(this->n_, this->alpha_, x, y);
+    return;
+  }
+
+  auto &reorder_src_mem_p = handler_->AcquireSrcMemory(x);
+  auto &reorder_dst_mem_p = handler_->AcquireDstMemory(y);
+  auto reorder_p = handler_->AcquireReorder();
+  auto &astream = OneDNNContext::tls().get_stream();
+  reorder_p.execute(astream, reorder_src_mem_p, reorder_dst_mem_p);
+  astream.wait();
+}
+
+template <typename T>
+OneDNNAXPYHandler<T>::OneDNNAXPYHandler(int64_t n,
+                                        T alpha,
+                                        const dnnl::engine onednn_engine)
+    : pimpl_{new Impl{n, alpha, onednn_engine},
+             [](Impl *impl) { delete impl; }} {
+  VLOG(4) << "[OneDNN] OneDNNAXPYHandler<" << typeid(T).name() << ">, "
+          << "n: " << n << ", alpha: " << alpha;
+}
+
+template <typename T>
+void OneDNNAXPYHandler<T>::operator()(const T *x, T *y) {
+  pimpl_->operator()(x, y);
+}
+
+template class OneDNNAXPYHandler<float>;
+template class OneDNNAXPYHandler<dtype::bfloat16>;
+
+}  // namespace funcs
+}  // namespace phi