[Mvapich-discuss] Can MPI_Bcast of the mvapich2 2.3.7 support for RocE V2 hardware UD-multicast?

[Panda, Dhabaleswar]

Thanks for your question. ROCEv2 adapters get connected to Ethernet switches (not InfiniBand switches). These switches do not include UD-based multicast. Thus, MPI_Bcast of the mvapich2 2.3.7 does not support ROCE V2 hardware UD-multicast.

DK

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Subject: [Mvapich-discuss] Can MPI_Bcast of the mvapich2 2.3.7 support for      RocE V2 hardware UD-multicast?

Hello， Can MPI_Bcast of the mvapich2 2. 3. 7 support for RocE V2 hardware UD-multicast? If it is supported, how should the environment variable parameters be set? Best regards! 云淡风轻 1432172324@ qq. com ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍
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Hello，
      Can MPI_Bcast of the mvapich2 2.3.7 support for RocE V2 hardware UD-multicast? If it is supported, how should the environment variable parameters be set?
Best regards!

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