1 /**
2 * Copyright 2021 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
17 #include "src/extendrt/delegate/tensorrt/tensorrt_serializer.h"
18 #include "src/extendrt/delegate/tensorrt/tensorrt_runtime.h"
19 #include "src/common/file_utils.h"
20
21 namespace mindspore::lite {
GetSerializedEngine()22 nvinfer1::ICudaEngine *TensorRTSerializer::GetSerializedEngine() {
23 if (serialize_file_path_.empty()) {
24 return nullptr;
25 }
26 char *trt_model_stream{nullptr};
27 size_t size{0};
28 trt_model_stream = ReadFile(serialize_file_path_.c_str(), &size);
29 if (trt_model_stream == nullptr || size == 0) {
30 MS_LOG(WARNING) << "read engine file failed : " << serialize_file_path_;
31 return nullptr;
32 }
33 nvinfer1::IRuntime *runtime = nvinfer1::createInferRuntime(logger_);
34 if (runtime == nullptr) {
35 delete[] trt_model_stream;
36 MS_LOG(ERROR) << "createInferRuntime failed.";
37 return nullptr;
38 }
39 nvinfer1::ICudaEngine *engine = runtime->deserializeCudaEngine(trt_model_stream, size, nullptr);
40 delete[] trt_model_stream;
41 runtime->destroy();
42 return engine;
43 }
SaveSerializedEngine(nvinfer1::ICudaEngine * engine)44 void TensorRTSerializer::SaveSerializedEngine(nvinfer1::ICudaEngine *engine) {
45 if (serialize_file_path_.size() == 0) {
46 return;
47 }
48 nvinfer1::IHostMemory *ptr = engine->serialize();
49 if (ptr == nullptr) {
50 MS_LOG(ERROR) << "serialize engine failed";
51 return;
52 }
53
54 int ret = WriteToBin(serialize_file_path_, ptr->data(), ptr->size());
55 if (ret != RET_OK) {
56 MS_LOG(ERROR) << "save engine failed " << serialize_file_path_;
57 } else {
58 MS_LOG(INFO) << "save engine to " << serialize_file_path_;
59 }
60 ptr->destroy();
61 return;
62 }
63 } // namespace mindspore::lite
64