4.9.3. Networking support / options

The following are command line options for various network types that can be used with configure:

• --with-fca=DIR: Specify the directory where the Mellanox FCA library and header files are located.

  FCA is the support library for Mellanox switches and HCAs.

• --with-hcoll=DIR: Specify the directory where the Mellanox hcoll library and header files are located. This option is generally only necessary if the hcoll headers and libraries are not in default compiler/linker search paths.

  hcoll is the support library for MPI collective operation offload on Mellanox ConnectX-3 HCAs (and later).

• --with-knem=DIR: Specify the directory where the knem libraries and header files are located. This option is generally only necessary if the knem headers and libraries are not in default compiler/linker search paths.

  knem is a Linux kernel module that allows direct process-to-process memory copies (optionally using hardware offload), potentially increasing bandwidth for large messages sent between messages on the same server. See the Knem web site for details.

• --with-libfabric=DIR: Specify the directory where the OpenFabrics Interfaces libfabric library and header files are located. This option is generally only necessary if the libfabric headers and libraries are not in default compiler/linker search paths.

  Libfabric is the support library for OpenFabrics Interfaces-based network adapters, such as Cisco usNIC, Intel True Scale PSM, Cray uGNI, etc.

• --with-libfabric-libdir=DIR: Look in directory for the libfabric libraries. By default, Open MPI will look in DIR/lib and DIR/lib64, which covers most cases. This option is only needed for special configurations.

• --with-portals4=DIR: Specify the directory where the Portals4 libraries and header files are located. This option is generally only necessary if the Portals4 headers and libraries are not in default compiler/linker search paths.

  Portals is a low-level network API for high-performance networking on high-performance computing systems developed by Sandia National Laboratories, Intel Corporation, and the University of New Mexico. The Portals 4 Reference Implementation is a complete implementation of Portals 4, with transport over InfiniBand verbs and UDP.

• --with-portals4-libdir=DIR: Location of libraries to link with for Portals4 support.

• --with-portals4-max-md-size=SIZE and --with-portals4-max-va-size=SIZE: Set configuration values for Portals 4

• --with-psm=<directory>: Specify the directory where the QLogic InfiniPath / Intel True Scale PSM library and header files are located. This option is generally only necessary if the PSM headers and libraries are not in default compiler/linker search paths.

  PSM is the support library for QLogic InfiniPath and Intel TrueScale network adapters.

• --with-psm-libdir=DIR: Look in directory for the PSM libraries. By default, Open MPI will look in DIR/lib and DIR/lib64, which covers most cases. This option is only needed for special configurations.

• --with-psm2=DIR: Specify the directory where the Intel Omni-Path PSM2 library and header files are located. This option is generally only necessary if the PSM2 headers and libraries are not in default compiler/linker search paths.

  PSM is the support library for Intel Omni-Path network adapters.

• --with-psm2-libdir=DIR: Look in directory for the PSM2 libraries. By default, Open MPI will look in DIR/lib and DIR/lib64, which covers most cases. This option is only needed for special configurations.

• --with-ucx=DIR: Specify the directory where the UCX libraries and header files are located. This option is generally only necessary if the UCX headers and libraries are not in default compiler/linker search paths.

• --with-ucx-libdir=DIR: Look in directory for the UCX libraries. By default, Open MPI will look in DIR/lib and DIR/lib64, which covers most cases. This option is only needed for special configurations.

• --with-usnic: Abort configure if Cisco usNIC support cannot be built.