I just checked, and our fastai part1v2 AMI instance for p2 also works just fine on p3!
However, the conda version of pytorch that’s installed isn’t optimized for the p3, so you need to
conda remove pytorch, and then install pytorch from source using the steps on their web site (which turns out to be very easy, thanks to the pytorch team’s awesome process and docs). After that, you can
pip install torchvision to get that back.
I haven’t had a chance to benchmark properly yet, but it’s looking pretty good…