mmdeploy/docs/en/backends/pplnn.md

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## PPLNN Support
This tutorial is based on Linux systems like Ubuntu-18.04.
### Installation
1. Please install [pyppl](https://github.com/openppl-public/ppl.nn) following [install-guide](https://github.com/openppl-public/ppl.nn/blob/master/docs/en/building-from-source.md).
2. Install MMdeploy following the [instructions](../build.md).
### Usage
Example:
```bash
python tools/deploy.py \
configs/mmdet/detection/detection_pplnn_dynamic-800x1344.py \
/mmdetection_dir/mmdetection/configs/retinanet/retinanet_r50_fpn_1x_coco.py \
/tmp/snapshots/retinanet_r50_fpn_1x_coco_20200130-c2398f9e.pth \
tests/data/tiger.jpeg \
--work-dir ../deploy_result \
--device cuda \
--log-level INFO \
```