Library information

MPI_VERSION :: VersionNumber

The supported version of the MPI standard.

External links

• MPI_Get_version man page: OpenMPI, MPICH

MPI_LIBRARY :: String

The current MPI implementation: this is determined by

MPI_LIBRARY_VERSION :: VersionNumber

The version of the MPI library

MPI_LIBRARY_VERSION_STRING :: String

The full version string provided by the library

External links

• MPI_Get_library_version man page: OpenMPI, MPICH

MPI.versioninfo(io::IO=stdout)

Print a summary of the current MPI configuration.

MPI.has_cuda()

Check if the MPI implementation is known to have CUDA support. Currently only Open MPI provides a mechanism to check, so it will return false with other implementations (unless overridden). For "IBMSpectrumMPI" it will return true.

This can be overridden by setting the JULIA_MPI_HAS_CUDA environment variable to true or false.

See also MPI.has_rocm for ROCm support.

MPI.has_rocm()

Check if the MPI implementation is known to have ROCm support. Currently only Open MPI provides a mechanism to check, so it will return false with other implementations (unless overridden).

This can be overridden by setting the JULIA_MPI_HAS_ROCM environment variable to true or false.

See also MPI.has_cuda for CUDA support.

MPI.has_gpu()

Checks if the MPI implementation is known to have GPU support. Currently this checks for the following GPUs:

1. CUDA: via MPI.has_cuda
2. ROCm: via MPI.has_rocm

See also MPI.has_cuda and MPI.has_rocm for more fine-grained checks.

impl, version = identify_implementation()

Attempt to identify the MPI implementation based on MPI_LIBRARY_VERSION_STRING. Returns a triple of values:

• impl: a String with the name of the MPI implementation, or "unknown" if it cannot be determined,
• version: a VersionNumber of the library, or nothing if it cannot be determined.

This function is only intended for internal use. Users should use MPI_LIBRARY, MPI_LIBRARY_VERSION.