IntelMPI over Mellanox 10GB RDMA chipset

[Thierry_C_1]

Hi

What is the best DAPL provider to used with IntelMPI 5.1  when running with a 10Gb RDMA chipsset from Mellanox?

Currently I'm using I_MPI_DAPL_PROVIDER=ofa-v2-scm-roe-mlx4_0-1

I added some others extra parameters to workaround the resource limitation that we have on the chip

  export I_MPI_DAPL_RDMA_RNDV_WRITE=on

   export I_MPI_RDMA_MAX_MSG_SIZE=1048576

Thanks

Thierry

[Artem_R_Intel1]

Hello Thierry,

The exact DAPL provider which gives you the best performance may depend on many factors (certain MPI application, size of the MPI task, specific cluster environment and so on). You can try to vary the available on your system DAPL providers and choose the one with best results.