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Subject: [OMPI users] RDMA GPUDirect CUDA...
From: Zbigniew Koza (zzkoza_at_[hidden])
Date: 2012-08-14 16:29:26


Hi,

I've just found this information on nVidia's plans regarding enhanced
support for MPI in their CUDA toolkit:
http://developer.nvidia.com/cuda/nvidia-gpudirect

The idea that two GPUs can talk to each other via network cards without
CPU as a middleman looks very promising.
This technology is supposed to be revealed and released in September.

My questions:

1. Will OpenMPI include RDMA support in its CUDA interface?
2. Any idea how much can this technology reduce the CUDA Send/Recv latency?
3. Any idea whether this technology will be available for Fermi-class
Tesla devices or only for Keplers?

Regards,

Z Koza