lb_walberla_init.cu

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/*
 * Copyright (C) 2022-2026 The ESPResSo project
 *
 * This file is part of ESPResSo.
 *
 * ESPResSo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ESPResSo 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <walberla_bridge/lattice_boltzmann/lb_walberla_init.hpp>
 
#if defined(__NVCC__)
#define RESTRICT __restrict__
#if defined(__NVCC_DIAG_PRAGMA_SUPPORT__)
#pragma nv_diagnostic push
#pragma nv_diag_suppress 554 // no implicit or explicit cast
#else
#pragma push
#pragma diag_suppress 554 // no implicit or explicit cast
#endif
#endif
 
#include "LBWalberlaImpl.hpp"
 
#if defined(__NVCC__)
#if defined(__NVCC_DIAG_PRAGMA_SUPPORT__)
#pragma nv_diagnostic pop
#else
#pragma pop
#endif
#endif
 
#include <walberla_bridge/Architecture.hpp>
#include <walberla_bridge/LatticeWalberla.hpp>
#include <walberla_bridge/lattice_boltzmann/LBWalberlaBase.hpp>
 
#include <gpu/DeviceSelectMPI.h>
#include <waLBerlaDefinitions.h>
 
#include <memory>
#include <stdexcept>
 
std::shared_ptr<LBWalberlaBase>
new_lb_walberla_gpu(std::shared_ptr<LatticeWalberla> const &lattice,
                    double viscosity, double density, bool single_precision) {
#if not defined(WALBERLA_BUILD_WITH_CUDA)
  throw std::runtime_error("waLBerla was compiled without CUDA support");
#else
  if (single_precision) {
    return std::make_shared<walberla::LBWalberlaImpl<float, lbmpy::Arch::GPU>>(
        lattice, viscosity, density);
  }
  return std::make_shared<walberla::LBWalberlaImpl<double, lbmpy::Arch::GPU>>(
      lattice, viscosity, density);
#endif
}
 
void set_device_id_per_rank() {
#if not defined(WALBERLA_BUILD_WITH_CUDA)
  throw std::runtime_error("waLBerla was compiled without CUDA support");
#else
  walberla::gpu::selectDeviceBasedOnMpiRank();
#endif
}