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Does the UCX support Nividia PXN without extra path when using NVSwitch? #10293

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MoFHeka opened this issue Nov 12, 2024 · 3 comments
Open

Does the UCX support Nividia PXN without extra path when using NVSwitch? #10293

MoFHeka opened this issue Nov 12, 2024 · 3 comments

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@MoFHeka
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MoFHeka commented Nov 12, 2024

PXN path shown as below:
message-path-gpu-gpu3

https://developer.nvidia.com/blog/doubling-all2all-performance-with-nvidia-collective-communication-library-2-12/
@brminich
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No, UCX currently does not support PXN-like transfers

@MoFHeka
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MoFHeka commented Nov 12, 2024

So if I want to implement all-to-all collective communication I better use NCCL?

@brminich
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If you assume it will be run in a configuration that benefits from PXN, then yes.

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@brminich @MoFHeka