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View the GPU usage of the machine
Regular update shows the condition of the gpu on the machine, refreshed once in #10s
nvidia-smi -l 10
Dynamically apply for video memory
config = tf.ConfigProto()
config.gpu_options.allow_growth = True
session = tf.Session(config=config)
Limit GPU usage
config = tf.ConfigProto()
config.gpu_options.per_process_gpu_memory_fraction = 0.4 #占用40%显存
session = tf.Session(config=config)
Specify which GPU to use
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
Set up in Python
os.environ['CUDA_VISIBLE_DEVICES'] = '0' #使用 GPU 0
os.environ['CUDA_VISIBLE_DEVICES'] = '0,1' # 使用 GPU 0,1