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cc @vanbasten23 , you might have already done, did we add the SPMD + GPU documentqtaion/section as well? |
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Good call. I haven't done that yet but let me add some tmr. |
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As pointed out in #6465, our documentation is missing discussion of how to initialize the process group in SPMD execution mode.
A process group is required for distributed checkpointing and can be used with various other
torch.distributedAPIs. In SPMD, we don't allow process groups on the XLA backend, since the compiler is responsible for controlling the on-device collectives.