我显卡的显存明明是80GB，为什么却提示只有很少？

[WangRongsheng]

CUDA out of memory. Tried to allocate 20.00 MiB (GPU 4; 3.82 GiB total capacity; 2.94 GiB already allocated; 6.62 MiB free; 3.06 GiB reserved in total by PyTorch) If reserved memory is >> allocated memory try setting max_split_size_mb to avoid fragmentation.  See documentation for Memory Management and PYTORCH_CUDA_ALLOC_CONF

[Sleepychord]

请检查CUDA_VISIBLE_DEVICES，本项目没有对显存做额外操作，应该是外面环境设置有问题。

[WangRongsheng]

解决方法：

export CUDA_VISIBLE_DEVICES=0,1,2,3