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NVIDIA / nccl

Optimized primitives for collective multi-GPU communication
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what is the nvidia IMEX channels in Multi-Node NVLink (MNNVL) #1483

Open vvmex opened 1 week ago

vvmex commented 1 week ago

Hi, Recently I was using NCCL MNNVL, and the documentation said that an imex channel was needed to generate a fabric handle. I just want to know what an imex channel is? and its relationship with the fabric handle, thank you.

AddyLaddy commented 1 week ago

MNNVL has not been publicly released yet. It would be easier to provide support via internal Nvidia support paths.

There is some description of IMEX and IMEX security channels in this document:

https://docs.nvidia.com/cuda/cuda-driver-api/group__CUDA__VA.html