[neomantra]

Nvidia got ConnectX from their Mellanox acquisition -- they were experts in RMDA, particularly with Infiniband but eventually pushing Ethernet (RoCE). These NICs have hardware-acceleration of RDMA. Over the RDMA fabric, GPUs can communicate with each other without much CPU usage (the "GPU-to-GPU" mentioned in the article).

[I know nothing about Jupiter, and little about RDMA in practice, but used ConnectX for VMA, its hardware-accelerated, kernel-bypass tech.]