Add process group documentation for SPMD #6469
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| cc @vanbasten23 , you might have already done, did we add the SPMD + GPU documentqtaion/section as well? |
Good call. I haven't done that yet but let me add some tmr. |
amithrm pushed a commit to amithrm/xla that referenced this pull request Mar 1, 2024
bhavya01 pushed a commit that referenced this pull request Apr 22, 2024
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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.