IMP::mpi Namespace Reference

Code that uses the MPI parallel library. More...

Detailed Description

Code that uses the MPI parallel library.

To enable this module, you must first install an MPI library and then make sure that the mpic++ binary is in the PATH (e.g. on a RedHat/Fedora system, you may need to run module load mpich or similar) before you run cmake. (There is no need to build all of IMP with mpic++ - that would force all of IMP to need the MPI library, not just the IMP.mpi module.)

If you want to use OpenMPI, note that the default build on many Linux systems doesn't play nicely with Python (you may see errors like mca: base: component_find: unable to open /usr/lib64/openmpi/lib/openmpi/mca_shmem_sysv: perhaps a missing symbol, or compiled for a different version of Open MPI?). This can be fixed either by recompiling OpenMPI with the --disable-dlopen configure flag, or by running import DLFCN as dl; sys.setdlopenflags(dl.RTLD_NOW|dl.RTLD_GLOBAL) in your Python script before importing IMP.mpi. We also recommend that you use version 1.7 of OpenMPI or older, as the 1.8 release does not appear to work with the mpi4py package that some parts of IMP::pmi use.

Info

Author(s): Max Bonomi

Maintainer: benmwebb

License: LGPL

Publications:

• See main IMP papers list.

Classes
class	ReplicaExchange
	A class to implement Hamiltonian Replica Exchange. More...

Standard module functions
All IMP modules have a set of standard functions to help get information about the module and about files associated with the module.
std::string	get_module_version ()
std::string	get_module_name ()
std::string	get_data_path (std::string file_name)
	Return the full path to one of this module's data files. More...
std::string	get_example_path (std::string file_name)
	Return the full path to one of this module's example files. More...

Function Documentation

std::string IMP::mpi::get_data_path

(

std::string

file_name

)

Return the full path to one of this module's data files.

To read the data file "data_library" that was placed in the data directory of this module, do something like

std::ifstream in(IMP::mpi::get_data_path("data_library"));

This will ensure that the code works both when IMP is installed or if used via the setup_environment.sh script.

Note

Each module has its own data directory, so be sure to use this function from the correct module.

std::string IMP::mpi::get_example_path

(

std::string

file_name

)

Return the full path to one of this module's example files.

To read the example file "example_protein.pdb" that was placed in the examples directory of this module, do something like

std::ifstream in(IMP::mpi::get_example_path("example_protein.pdb"));

This will ensure that the code works both when IMP is installed or if used via the setup_environment.sh script.

Note

Each module has its own example directory, so be sure to use this function from the correct module.