$ nvidia-smi
其中左上侧有0、1、2、3的编号,表示GPU的编号,在后面指定GPU时需要使用这个编号。
$ CUDA_VISIBLE_DEVICES=1 python run_file.py
可用以下形式:
CUDA_VISIBLE_DEVICES=1 Only device 1 will be seen CUDA_VISIBLE_DEVICES=0,1 Devices 0 and 1 will be visible CUDA_VISIBLE_DEVICES=“0,1” Same as above, quotation marks are optional CUDA_VISIBLE_DEVICES=0,2,3 Devices 0, 2, 3 will be visible; device 1 is masked CUDA_VISIBLE_DEVICES="" No GPU will be visible
import os
os.environ["CUDA_VISIBLE_DEVICES"] = "0"