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/*
* This file is part of the GROMACS molecular simulation package.
*
* Copyright 2018- The GROMACS Authors
* and the project initiators Erik Lindahl, Berk Hess and David van der Spoel.
* Consult the AUTHORS/COPYING files and https://www.gromacs.org for details.
*
* GROMACS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* GROMACS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GROMACS; if not, see
* https://www.gnu.org/licenses, or write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* If you want to redistribute modifications to GROMACS, please
* consider that scientific software is very special. Version
* control is crucial - bugs must be traceable. We will be happy to
* consider code for inclusion in the official distribution, but
* derived work must not be called official GROMACS. Details are found
* in the README & COPYING files - if they are missing, get the
* official version at https://www.gromacs.org.
*
* To help us fund GROMACS development, we humbly ask that you cite
* the research papers on the package. Check out https://www.gromacs.org.
*/
/*! \file
* \brief Test gmxapi::Context
*
* Provides additional test coverage of template headers only used by client code.
*/
#include "gmxapi/context.h"
#include "gromacs/utility/gmxmpi.h"
#include "gmxapi/mpi/gmxapi_mpi.h"
#include "testingconfiguration.h"
namespace gmxapi
{
namespace testing
{
namespace
{
TEST_F(GmxApiTest, AllContext)
{
// Default Implicit COMM_WORLD for MPI builds.
EXPECT_NO_THROW(auto context = createContext());
}
#if GMX_LIB_MPI
TEST_F(GmxApiTest, NullContext)
{
// Explicit COMM_NULL is not supported.
EXPECT_ANY_THROW(assignResource(MPI_COMM_NULL));
}
TEST_F(GmxApiTest, MpiWorldContext)
{
// Note that this test is only compiled when GMX_MPI is enabled for the
// build tree, so we cannot unit test the behavior of non-MPI GROMACS
// provided with MPI-enabled Context. For that, we defer to the Python
// package testing.
// Note also that the code should look the same for tMPI or regular MPI.
// Explicit COMM_WORLD.
auto resources = assignResource(MPI_COMM_WORLD);
EXPECT_TRUE(resources->size() != 0);
// Store the rank for debugging convenience.
[[maybe_unused]] auto rank = resources->rank();
auto context = createContext(*resources);
}
TEST_F(GmxApiTest, MpiSplitContext)
{
// Explicit sub-communicator.
MPI_Comm communicator = MPI_COMM_NULL;
int rank{ 0 };
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
// Run each rank as a separate ensemble member.
MPI_Comm_split(MPI_COMM_WORLD, rank, rank, &communicator);
EXPECT_NO_THROW(auto context = createContext(*assignResource(communicator)));
}
#endif
} // end anonymous namespace
} // end namespace testing
} // end namespace gmxapi
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