ignis-collective

https://github.com/tigel-agm/Ignis

ignis-collective brings NCCL-style collective communication to Ruby: ring/tree all-reduce, and P2P / IPC (VMM) / host-staged / TCP transports, on the Ignis foundation. EXPERIMENTAL — the transports require multiple GPUs / nodes and cannot be exercised on a single GPU, so this is shipped separately from the verified single-GPU stack.