Hi,
I am porting some of my old code (Pytorch 0.4.0) to latest pytorch version, although there is hardly any syntactic difference. But, i have observed that some architectures like an autoencoder trains much slower on the latest pytorch, while using a classification network like taking off-the-shelf resnet from torchvision models takes the same amount of time for training.
I have tried using the torch.backends.cudnn.benchmark=True solution, but that doesn’t help.
I have also tried reinstalling conda and the environments, but it makes no difference.
My machine’s configuration is Ubuntu 18.04, Nvidia GTX 1080 Ti
For a sample run, I took this simple convolutional autoencoder from [here] and trained it on mnist.(https://github.com/L1aoXingyu/pytorch-beginner/tree/master/08-AutoEncoder 5)
With pytorch 0.4.0, torchvision 0.2.1, cudatoolkit 9.0, cudnn 7.6.0, each epoch takes ~4 seconds.
With pytorch 1.1.0, torchvision 0.3.0 and cudatoolkit 10.0, cudnn 7.5.1, each epoch takes ~7 seconds.
Let me know if someone has observed a similar issue and any help in rectifying is appreciated.