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graph_item.cc 2.0 kB

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  1. /**
  2. * Copyright 2019-2020 Huawei Technologies Co., Ltd
  3. *
  4. * Licensed under the Apache License, Version 2.0 (the "License");
  5. * you may not use this file except in compliance with the License.
  6. * You may obtain a copy of the License at
  7. *
  8. * http://www.apache.org/licenses/LICENSE-2.0
  9. *
  10. * Unless required by applicable law or agreed to in writing, software
  11. * distributed under the License is distributed on an "AS IS" BASIS,
  12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13. * See the License for the specific language governing permissions and
  14. * limitations under the License.
  15. */
  16. #include "framework/common/util.h"
  17. #include "graph_item.h"
  18. namespace ge {
  19. namespace hybrid {
  20. namespace {
  21. constexpr int kInvalidIndex = -1;
  22. } // namespace
  23. GraphItem::~GraphItem() {
  24. GELOGD("[%s] GraphItem destroyed.", name_.c_str());
  25. }
  26. const vector<NodeItem *> &hybrid::GraphItem::GetAllNodes() const {
  27. return node_items_;
  28. }
  29. const vector<const NodeItem *> &GraphItem::GetInputNodes() const {
  30. return input_nodes_;
  31. }
  32. Status GraphItem::GetOutputDescList(vector<ConstGeTensorDescPtr> &output_desc_list) const {
  33. if (output_node_ == nullptr) {
  34. return SUCCESS;
  35. }
  36. if (is_dynamic_) {
  37. for (auto &tensor_desc : output_node_->GetOpDesc()->GetAllInputsDescPtr()) {
  38. output_desc_list.emplace_back(tensor_desc);
  39. }
  40. } else {
  41. for (auto &tensor_desc : output_node_->GetOpDesc()->GetAllOutputsDescPtr()) {
  42. output_desc_list.emplace_back(tensor_desc);
  43. }
  44. }
  45. return SUCCESS;
  46. }
  47. bool GraphItem::IsDynamic() const {
  48. return is_dynamic_;
  49. }
  50. const vector<int> &GraphItem::GetInputIndexMapping() const {
  51. return input_index_mapping_;
  52. }
  53. int GraphItem::GetParentOutputIndex(size_t index) const {
  54. if (index >= output_index_mapping_.size()) {
  55. return kInvalidIndex;
  56. }
  57. return output_index_mapping_[index];
  58. }
  59. const NodeItem *GraphItem::GetOutputNode() const {
  60. return output_node_;
  61. }
  62. } // namespace hybrid
  63. } // namespace ge

图引擎模块(GE)是MindSpore的一个子模块,其代码由C++实现,位于前端模块ME和底层硬件之间,起到承接作用。图引擎模块以ME下发的图作为输入,然后进行一系列的深度图优化操作,最后输出一张可以在底层硬件上高效运行的图。GE针对昇腾AI处理器的硬件结构特点,做了特定的优化工作,以此来充分发挥出昇腾AI处理器的强大算力。在进行模型训练/推理时,GE会被自动调用而用户并不感知。GE主要由GE API和GE Core两部分组成,详细的架构图如下所示