BENCHMARK_INFER_cn.md

# 推理Benchmark

## 环境准备
- 测试环境:
  - CUDA 9.0
  - CUDNN 7.5
  - TensorRT-5.1.2.2
  - PaddlePaddle v1.6
  - GPU分别为: Tesla V100和Tesla P4
- 测试方式:
  - 为了方便比较不同模型的推理速度，输入采用同样大小的图片，为 3x640x640，采用 `demo/000000014439_640x640.jpg` 图片。
  - Batch Size=1
  - 去掉前10轮warmup时间，测试100轮的平均时间，单位ms/image，包括输入数据拷贝至GPU的时间、计算时间、数据拷贝至CPU的时间。
  - 采用Fluid C++预测引擎: 包含Fluid C++预测、Fluid-TensorRT预测，下面同时测试了Float32 (FP32) 和Float16 (FP16)的推理速度。
  - 测试时开启了 FLAGS_cudnn_exhaustive_search=True，使用exhaustive方式搜索卷积计算算法。

## 推理速度


| 模型                                  | Tesla V100 Fluid   (ms/image) | Tesla V100   Fluid-TensorRT-FP32 (ms/image) | Tesla V100   Fluid-TensorRT-FP16 (ms/image) | Tesla P4 Fluid   (ms/image) | Tesla P4   Fluid-TensorRT-FP32 (ms/image) |
| ------------------------------------- | ----------------------------- | ------------------------------------------- | ------------------------------------------- | --------------------------- | ----------------------------------------- |
| faster_rcnn_r50_1x                    | 147.488                       | 146.124                                     | 142.416                                     | 471.547                     | 471.631                                   |
| faster_rcnn_r50_2x                    | 147.636                       | 147.73                                      | 141.664                                     | 471.548                     | 472.86                                    |
| faster_rcnn_r50_vd_1x                 | 146.588                       | 144.767                                     | 141.208                                     | 459.357                     | 457.852                                   |
| faster_rcnn_r50_fpn_1x                | 25.11                         | 24.758                                      | 20.744                                      | 59.411                      | 57.585                                    |
| faster_rcnn_r50_fpn_2x                | 25.351                        | 24.505                                      | 20.509                                      | 59.594                      | 57.591                                    |
| faster_rcnn_r50_vd_fpn_2x             | 25.514                        | 25.292                                      | 21.097                                      | 61.026                      | 58.377                                    |
| faster_rcnn_r50_fpn_gn_2x             | 36.959                        | 36.173                                      | 32.356                                      | 101.339                     | 101.212                                   |
| faster_rcnn_dcn_r50_fpn_1x            | 28.707                        | 28.162                                      | 27.503                                      | 68.154                      | 67.443                                    |
| faster_rcnn_dcn_r50_vd_fpn_2x         | 28.576                        | 28.271                                      | 27.512                                      | 68.959                      | 68.448                                    |
| faster_rcnn_r101_1x                   | 153.267                       | 150.985                                     | 144.849                                     | 490.104                     | 486.836                                   |
| faster_rcnn_r101_fpn_1x               | 30.949                        | 30.331                                      | 24.021                                      | 73.591                      | 69.736                                    |
| faster_rcnn_r101_fpn_2x               | 30.918                        | 29.126                                      | 23.677                                      | 73.563                      | 70.32                                     |
| faster_rcnn_r101_vd_fpn_1x            | 31.144                        | 30.202                                      | 23.57                                       | 74.767                      | 70.773                                    |
| faster_rcnn_r101_vd_fpn_2x            | 30.678                        | 29.969                                      | 23.327                                      | 74.882                      | 70.842                                    |
| faster_rcnn_x101_vd_64x4d_fpn_1x      | 60.36                         | 58.461                                      | 45.172                                      | 132.178                     | 131.734                                   |
| faster_rcnn_x101_vd_64x4d_fpn_2x      | 59.003                        | 59.163                                      | 46.065                                      | 131.422                     | 132.186                                   |
| faster_rcnn_dcn_r101_vd_fpn_1x        | 36.862                        | 37.205                                      | 36.539                                      | 93.273                      | 92.616                                    |
| faster_rcnn_dcn_x101_vd_64x4d_fpn_1x  | 78.476                        | 78.335                                      | 77.559                                      | 185.976                     | 185.996                                   |
| faster_rcnn_se154_vd_fpn_s1x          | 166.282                       | 90.508                                      | 80.738                                      | 304.653                     | 193.234                                   |
| mask_rcnn_r50_1x                      | 160.185                       | 160.4                                       | 160.322                                     | -                           | -                                         |
| mask_rcnn_r50_2x                      | 159.821                       | 159.527                                     | 160.41                                      | -                           | -                                         |
| mask_rcnn_r50_fpn_1x                  | 95.72                         | 95.719                                      | 92.455                                      | 259.8                       | 258.04                                    |
| mask_rcnn_r50_fpn_2x                  | 84.545                        | 83.567                                      | 79.269                                      | 227.284                     | 222.975                                   |
| mask_rcnn_r50_vd_fpn_2x               | 82.07                         | 82.442                                      | 77.187                                      | 223.75                      | 221.683                                   |
| mask_rcnn_r50_fpn_gn_2x               | 94.936                        | 94.611                                      | 91.42                                       | 265.468                     | 263.76                                    |
| mask_rcnn_dcn_r50_fpn_1x              | 97.828                        | 97.433                                      | 93.76                                       | 256.295                     | 258.056                                   |
| mask_rcnn_dcn_r50_vd_fpn_2x           | 77.831                        | 79.453                                      | 76.983                                      | 205.469                     | 204.499                                   |
| mask_rcnn_r101_fpn_1x                 | 95.543                        | 97.929                                      | 90.314                                      | 252.997                     | 250.782                                   |
| mask_rcnn_r101_vd_fpn_1x              | 98.046                        | 97.647                                      | 90.272                                      | 261.286                     | 262.108                                   |
| mask_rcnn_x101_vd_64x4d_fpn_1x        | 115.461                       | 115.756                                     | 102.04                                      | 296.066                     | 293.62                                    |
| mask_rcnn_x101_vd_64x4d_fpn_2x        | 107.144                       | 107.29                                      | 97.275                                      | 267.636                     | 267.577                                   |
| mask_rcnn_dcn_r101_vd_fpn_1x          | 85.504                        | 84.875                                      | 84.907                                      | 225.202                     | 226.585                                   |
| mask_rcnn_dcn_x101_vd_64x4d_fpn_1x    | 129.937                       | 129.934                                     | 127.804                                     | 326.786                     | 326.161                                   |
| mask_rcnn_se154_vd_fpn_s1x            | 214.188                       | 139.807                                     | 121.516                                     | 440.391                     | 439.727                                   |
| cascade_rcnn_r50_fpn_1x               | 36.866                        | 36.949                                      | 36.637                                      | 101.851                     | 101.912                                   |
| cascade_mask_rcnn_r50_fpn_1x          | 110.344                       | 106.412                                     | 100.367                                     | 301.703                     | 297.739                                   |
| cascade_rcnn_dcn_r50_fpn_1x           | 40.412                        | 39.58                                       | 39.853                                      | 110.346                     | 110.077                                   |
| cascade_mask_rcnn_r50_fpn_gn_2x       | 170.092                       | 168.758                                     | 163.298                                     | 527.998                     | 529.59                                    |
| cascade_rcnn_dcn_r101_vd_fpn_1x       | 48.414                        | 48.849                                      | 48.701                                      | 134.9                       | 134.846                                   |
| cascade_rcnn_dcn_x101_vd_64x4d_fpn_1x | 90.062                        | 90.218                                      | 90.009                                      | 228.67                      | 228.396                                   |
| retinanet_r101_fpn_1x                 | 55.59                         | 54.636                                      | 48.489                                      | 90.394                      | 83.951                                    |
| retinanet_r50_fpn_1x                  | 50.048                        | 47.932                                      | 44.385                                      | 73.819                      | 70.282                                    |
| retinanet_x101_vd_64x4d_fpn_1x        | 83.329                        | 83.446                                      | 70.76                                       | 145.936                     | 146.168                                   |
| yolov3_darknet                        | 21.427                        | 20.252                                      | 13.856                                      | 55.173                      | 55.692                                    |
| yolov3_darknet_voc                    | 17.58                         | 16.241                                      | 9.473                                       | 51.049                      | 51.249                                    |
| yolov3_mobilenet_v1                   | 12.869                        | 11.834                                      | 9.408                                       | 24.887                      | 21.352                                    |
| yolov3_mobilenet_v1_voc               | 9.118                         | 8.146                                       | 5.575                                       | 20.787                      | 17.169                                    |
| yolov3_r34                            | 14.914                        | 14.125                                      | 11.176                                      | 20.798                      | 20.822                                    |
| yolov3_r34_voc                        | 11.288                        | 10.73                                       | 7.7                                         | 25.874                      | 22.399                                    |
| ssd_mobilenet_v1_voc                  | 5.763                         | 5.854                                       | 4.589                                       | 11.75                       | 9.485                                     |
| ssd_vgg16_300                         | 28.722                        | 29.644                                      | 20.399                                      | 73.707                      | 74.531                                    |
| ssd_vgg16_300_voc                     | 18.425                        | 19.288                                      | 11.298                                      | 56.297                      | 56.201                                    |
| ssd_vgg16_512                         | 27.471                        | 28.328                                      | 19.328                                      | 68.685                      | 69.808                                    |
| ssd_vgg16_512_voc                     | 18.721                        | 19.636                                      | 12.004                                      | 54.688                      | 56.174                                    |

1. RCNN系列模型Fluid-TensorRT速度相比Fluid预测没有优势，原因是: TensorRT仅支持定长输入，当前基于ResNet系列的RCNN模型，只有backbone部分采用了TensorRT子图计算，比较耗时的stage-5没有基于TensorRT计算。 Fluid对CNN模型也做了一系列的融合优化。后续TensorRT版本升级、或有其他优化策略时再更新数据。
2. YOLO v3系列模型，Fluid-TensorRT相比Fluid预测加速5% - 10%不等。
3. SSD和YOLOv3系列模型 TensorRT-FP16预测速度有一定的优势，加速约20% - 40%不等。具体如下图。


![](../../images/bench_ssd_yolo_infer.png)