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update mkldnn int8v2 doc (#18177)

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revert-18229-add_multi_gpu_install_check
bingyanghuang 6 years ago committed by Tao Luo
parent 4978db2c10
commit 5cf7e7415d
1 changed files with 8 additions and 7 deletions
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python/paddle/fluid/contrib/int8_inference/README.md
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@ -6,7 +6,7 @@ PaddlePaddle supports offline INT8 calibration to accelerate the inference speed
You need to install at least PaddlePaddle-1.3 python package `pip install paddlepaddle==1.3`.
## 1. How to generate INT8 model
You can refer to the unit test in [test_calibration.py](../tests/test_calibration.py). Basically, there are three steps:
You can refer to the unit test in [test_calibration_resnet50.py](../tests/test_calibration_resnet50.py). Basically, there are three steps:
* Construct calibration object.
```python
@ -68,18 +68,19 @@ Notes:
* The INT8 theoretical speedup is 4X on Intel® Xeon® Cascadelake Server (please refer to `The theoretical peak compute gains are 4x int8 OPS over fp32 OPS.` in [Reference](https://software.intel.com/en-us/articles/lower-numerical-precision-deep-learning-inference-and-training "Reference")). Therefore, op-level gain is 4X and topology-level is smaller.
## 4. How to reproduce the results
* Small dataset (Single core)
* Small dataset for ResNet-50 (Single core)
```bash
FLAGS_use_mkldnn=true python python/paddle/fluid/contrib/tests/test_calibration.py
FLAGS_use_mkldnn=true python python/paddle/fluid/contrib/tests/test_calibration_resnet50.py
```
>Note: Change `test_calibration_resnet50.py` to `test_calibration_mobilenetv1.py` for MobileNet-V1. Same for the following commands.
* Full dataset (Single core)
* Full dataset for ResNet-50 (Single core)
```bash
FLAGS_use_mkldnn=true DATASET=full python python/paddle/fluid/contrib/tests/test_calibration.py
FLAGS_use_mkldnn=true DATASET=full python python/paddle/fluid/contrib/tests/test_calibration_resnet50.py
```
* Full dataset (Multi-core)
* Full dataset for ResNet-50 (Multi-core)
```bash
FLAGS_use_mkldnn=true OMP_NUM_THREADS=20 DATASET=full python python/paddle/fluid/contrib/tests/test_calibration.py
FLAGS_use_mkldnn=true OMP_NUM_THREADS=20 DATASET=full python python/paddle/fluid/contrib/tests/test_calibration_resnet50.py
```
> Notes: This is an example command with 20 cores by using set `OMP_NUM_THREADS` value.

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