[mvapich-discuss] MVAPICH2 and hardware multicast for MPI_Bcast

[Verdi March]

Hi,

does MVAPICH2 support hardware multicast for MPI_Bcast?

I don't see the MCST_* flag in its build scripts, nor does any
indication in its source code.

At least, I could find in MVAPICH's source that mcast is supported.

Or, does MVAPICH2 automatically use multicast without a need to
explictly set any built/run-time flag?

Your clarification is appreciated.

Regards,
Verdi