> Has anyone tried machine learning on this or the Graviton2?
I have not done any machine learning on AWS Graviton2 CPUs but I ran many other CPU benchmarks on Graviton2 CPUs and overall I have been disappointed by their performance. They are still much slower than current x64 CPUs (x64 CPUs are up to 2x faster in single thread mode).
According to the benchmarks from Anandtech the Ampere Altra should have much better performance than Graviton2 CPUs as its performance is neck to neck with the fastest x64 CPUs.
I understand TPUs and GPUs easily beat these guys but it would still be interesting to see what raw cpu power can achieve in 2020.