CUDA: support for lazy init #758
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Can one of the admins verify this patch? |
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What
Lazily initialize TL NCCL and TL CUDA on first CUDA collective.
Why ?
Both NCCL and CUDA require CUDA devices to be set before team create. In MPI workloads it's not always possible since MPI_Init creates UCC team and to set device we need to know rank and local rank.