fix doc related to CPU (#3048)

PaddleCV/PaddleDetection/docs/GETTING_STARTED.md

@@ -28,7 +28,7 @@ python tools/train.py -c configs/faster_rcnn_r50_1x.yml
 ```bash
 export CPU_NUM=8
 export PYTHONPATH=$PYTHONPATH:.
-python tools/train.py -c configs/faster_rcnn_r50_1x.yml
+python tools/train.py -c configs/faster_rcnn_r50_1x.yml -o use_gpu=false
 ```
 
 ##### Optional arguments
@@ -80,10 +80,9 @@ python -u tools/train.py -c configs/faster_rcnn_r50_1x.yml \
 
 
 ```bash
-export CUDA_VISIBLE_DEVICES=0
+# run on GPU with:
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
+export CUDA_VISIBLE_DEVICES=0
 python tools/eval.py -c configs/faster_rcnn_r50_1x.yml
 ```
 
@@ -98,10 +97,9 @@ python tools/eval.py -c configs/faster_rcnn_r50_1x.yml
 
 - configuration options && assign Dataset path
 ```bash
-export CUDA_VISIBLE_DEVICES=0
+# run on GPU with:
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
+export CUDA_VISIBLE_DEVICES=0
 python -u tools/eval.py -c configs/faster_rcnn_r50_1x.yml \
                         -o weights=output/faster_rcnn_r50_1x/model_final \
                         -d dataset/coco
@@ -109,10 +107,9 @@ python -u tools/eval.py -c configs/faster_rcnn_r50_1x.yml \
 
 - Evaluation with json
 ```bash
-export CUDA_VISIBLE_DEVICES=0
+# run on GPU with:
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
+export CUDA_VISIBLE_DEVICES=0
 python tools/eval.py -c configs/faster_rcnn_r50_1x.yml \
              --json_eval \
              -f evaluation/
@@ -133,20 +130,18 @@ moment, but it is a planned feature
 - Run inference on a single image:
 
 ```bash
-export CUDA_VISIBLE_DEVICES=0
+# run on GPU with:
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
+export CUDA_VISIBLE_DEVICES=0
 python tools/infer.py -c configs/faster_rcnn_r50_1x.yml --infer_img=demo/000000570688.jpg
 ```
 
 - Multi-image inference:
 
 ```bash
-export CUDA_VISIBLE_DEVICES=0
+# run on GPU with:
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
+export CUDA_VISIBLE_DEVICES=0
 python tools/infer.py -c configs/faster_rcnn_r50_1x.yml --infer_dir=demo
 ```
 
@@ -160,10 +155,9 @@ python tools/infer.py -c configs/faster_rcnn_r50_1x.yml --infer_dir=demo
 
 - Output specified directory && Set up threshold
 ```bash
-export CUDA_VISIBLE_DEVICES=0
+# run on GPU with:
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
+export CUDA_VISIBLE_DEVICES=0
 python tools/infer.py -c configs/faster_rcnn_r50_1x.yml \
                       --infer_img=demo/000000570688.jpg \
                       --output_dir=infer_output/ \
@@ -176,10 +170,9 @@ path, simply add a `--output_dir=` flag.
 - Save inference model
 
 ```bash
+# run on GPU with:
 export CUDA_VISIBLE_DEVICES=0
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
 python tools/infer.py -c configs/faster_rcnn_r50_1x.yml \
                       --infer_img=demo/000000570688.jpg \
                       --save_inference_model

PaddleCV/PaddleDetection/docs/GETTING_STARTED_cn.md

@@ -29,7 +29,7 @@ python tools/train.py -c configs/faster_rcnn_r50_1x.yml
 ```bash
 export CPU_NUM=8
 export PYTHONPATH=$PYTHONPATH:.
-python tools/train.py -c configs/faster_rcnn_r50_1x.yml
+python tools/train.py -c configs/faster_rcnn_r50_1x.yml -o use_gpu=false
 ```
 
 ##### 可选参数
@@ -75,10 +75,9 @@ python -u tools/train.py -c configs/faster_rcnn_r50_1x.yml \
 
 
 ```bash
+# GPU评估
 export CUDA_VISIBLE_DEVICES=0
 export PYTHONPATH=$PYTHONPATH:.
-# 若使用CPU，则执行
-# export CPU_NUM=1
 python tools/eval.py -c configs/faster_rcnn_r50_1x.yml
 ```
 
@@ -93,10 +92,9 @@ python tools/eval.py -c configs/faster_rcnn_r50_1x.yml
 
 - 设置配置文件参数 && 指定数据集路径
 ```bash
+# GPU评估
 export CUDA_VISIBLE_DEVICES=0
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
 python -u tools/eval.py -c configs/faster_rcnn_r50_1x.yml \
                         -o weights=output/faster_rcnn_r50_1x/model_final \
                         -d dataset/coco
@@ -104,10 +102,9 @@ python -u tools/eval.py -c configs/faster_rcnn_r50_1x.yml \
 
 - 通过json文件评估
 ```bash
+# GPU评估
 export CUDA_VISIBLE_DEVICES=0
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
 python tools/eval.py -c configs/faster_rcnn_r50_1x.yml \
              --json_eval \
              -f evaluation/
@@ -127,20 +124,18 @@ json文件必须命名为bbox.json或者mask.json，放在`evaluation/`目录下
 - 单图片推断
 
 ```bash
+# GPU推断
 export CUDA_VISIBLE_DEVICES=0
 export PYTHONPATH=$PYTHONPATH:.
-# 若使用CPU，则执行
-# export CPU_NUM=1
 python tools/infer.py -c configs/faster_rcnn_r50_1x.yml --infer_img=demo/000000570688.jpg
 ```
 
 - 多图片推断
 
 ```bash
+# GPU推断
 export CUDA_VISIBLE_DEVICES=0
 export PYTHONPATH=$PYTHONPATH:.
-# 若使用CPU，则执行
-# export CPU_NUM=1
 python tools/infer.py -c configs/faster_rcnn_r50_1x.yml --infer_dir=demo
 ```
 
@@ -154,10 +149,9 @@ python tools/infer.py -c configs/faster_rcnn_r50_1x.yml --infer_dir=demo
 
 - 设置输出路径 && 设置推断阈值
 ```bash
+# GPU推断
 export CUDA_VISIBLE_DEVICES=0
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
 python tools/infer.py -c configs/faster_rcnn_r50_1x.yml \
                       --infer_img=demo/000000570688.jpg \
                       --output_dir=infer_output/ \
@@ -171,10 +165,9 @@ python tools/infer.py -c configs/faster_rcnn_r50_1x.yml \
 - 保存推断模型
 
 ```bash
+# GPU推断
 export CUDA_VISIBLE_DEVICES=0
 export PYTHONPATH=$PYTHONPATH:.
-# or run on CPU with:
-# export CPU_NUM=1
 python tools/infer.py -c configs/faster_rcnn_r50_1x.yml --infer_img=demo/000000570688.jpg \
                       --save_inference_model
 ```