forked from lijiext/lammps
119 lines
3.9 KiB
C++
119 lines
3.9 KiB
C++
/*
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//@HEADER
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// ************************************************************************
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//
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// Kokkos v. 2.0
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// Copyright (2014) Sandia Corporation
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the Corporation nor the names of the
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
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//
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// ************************************************************************
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//@HEADER
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*/
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#error "ParallelMachine"
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#ifndef PARALLELMACHINE_HPP
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#define PARALLELMACHINE_HPP
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//------------------------------------------------------------------------
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#include <iosfwd>
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#include <Kokkos_Core.hpp>
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//------------------------------------------------------------------------
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#if defined( KOKKOS_HAVE_MPI )
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#include <mpi.h>
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#else
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typedef int MPI_Comm ;
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#endif
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//------------------------------------------------------------------------
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//------------------------------------------------------------------------
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namespace Parallel {
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/** \brief Hybrid parallel machine with MPI+Kokkos::Threads or MPI+Kokkos::Cuda.
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*
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* Initialization of MPI and Kokkos device has interdependencies which this
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* class manages. The command line and environment variables are queried to initialize
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* the Threads or Cuda device:
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*
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* 1) cuda : initializes Cuda device
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* 2) host : initializes Threads device with all hwloc detected cores.
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* 3) host #gang #worker : initializes Threads with specified
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*/
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class Machine {
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private:
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MPI_Comm m_mpi_comm ;
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int m_mpi_size ;
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int m_mpi_rank ;
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unsigned m_mpi_gpu ;
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unsigned m_gpu_arch ;
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Machine();
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Machine( const Machine & );
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Machine & operator = ( const Machine & );
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public:
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/** \brief Coordinated initialize MPI, Cuda, or Threads devices from 'main'. */
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Machine( int * argc , char *** argv );
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~Machine();
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MPI_Comm mpi_comm() const { return m_mpi_comm ; }
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int mpi_size() const { return m_mpi_size ; }
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int mpi_rank() const { return m_mpi_rank ; }
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/** \brief If using MPI that can directly operate on GPU memory */
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bool mpi_gpu() const { return m_mpi_gpu ; }
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/** \brief If using GPU then what architecture */
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unsigned gpu_arch() const { return m_gpu_arch ; }
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void print_configuration( std::ostream & ) const ;
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};
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}
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//------------------------------------------------------------------------
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#endif /* #ifndef PARALLELMACHINE_HPP */
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