TensorFlow를 공용 GPU에서 사용 할 때 메모리 절약 방법
TensorFlow를 공용 GPU에서 사용 할 때 메모리 절약 방법
절대적 메모리 uppeor bound 설정
tf.Session생성 할 때 GPU memory allocation을 지정할 수 있다. 이것을 위해서 tf.GPUOptions에 config부분을 아래와 같이 활용 한다.
# Assume that you have 12GB of GPU memory and want to allocate ~4GB:
gpu_options = tf.GPUOptions(per_process_gpu_memory_fraction=0.333)
sess = tf.Session(config=tf.ConfigProto(gpu_options=gpu_options))
위와 같이 per_process_gpu_memory_fraction=0.333으로 설정된 것은 strict하게 upper bound on the amount of GPU memory를 설정한 것이다.
탄력적으로 GPU memory 사용 방법
아래와 같이 allow_growth를 True로 설정하면 필요에 따라 탄력적으로 memory를 사용하게 된다.
config = tf.ConfigProto()
config.gpu_options.allow_growth = True
session = tf.Session(config=config, ...)출처: https://goodtogreate.tistory.com/entry/TensorFlow를-공용-GPU에서-사용-할-때-메모리-절약-방법 [GOOD to GREAT]
시스템 환경 설정으로 적용하는 방법
export TF_FORCE_GPU_ALLOW_GROWTH=true
해도 동일한 효과를 가질 수 있음.
Tensorflow 2.x 적용하는 방법
import tensorflow as tf
config = tf.compat.v1.ConfigProto()
config.gpu_options.allow_growth = True
session = tf.compat.v1.Session(config=config)
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