/usr/include/trilinos/KokkosKernels_ExecSpaceUtils.hpp is in libtrilinos-kokkos-kernels-dev 12.12.1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//@HEADER
// ************************************************************************
//
// KokkosKernels 0.9: Linear Algebra and Graph Kernels
// Copyright 2017 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Questions? Contact Siva Rajamanickam (srajama@sandia.gov)
//
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*/
#include "Kokkos_Core.hpp"
#include "Kokkos_Atomic.hpp"
#ifndef _KOKKOSKERNELSUTILSEXECSPACEUTILS_HPP
#define _KOKKOSKERNELSUTILSEXECSPACEUTILS_HPP
namespace KokkosKernels{
namespace Experimental{
namespace Util{
enum ExecSpaceType{Exec_SERIAL, Exec_OMP, Exec_PTHREADS, Exec_QTHREADS, Exec_CUDA};
template <typename ExecutionSpace>
inline ExecSpaceType kk_get_exec_space_type(){
#if defined( KOKKOS_HAVE_SERIAL )
if (Kokkos::Impl::is_same< Kokkos::Serial , ExecutionSpace >::value){
return Exec_SERIAL;
}
#endif
#if defined( KOKKOS_HAVE_PTHREAD )
if (Kokkos::Impl::is_same< Kokkos::Threads , ExecutionSpace >::value){
return Exec_PTHREADS;
}
#endif
#if defined( KOKKOS_HAVE_OPENMP )
if (Kokkos::Impl::is_same< Kokkos::OpenMP, ExecutionSpace >::value){
return Exec_OMP;
}
#endif
#if defined( KOKKOS_HAVE_CUDA )
if (Kokkos::Impl::is_same<Kokkos::Cuda, ExecutionSpace >::value){
return Exec_CUDA;
}
#endif
#if defined( KOKKOS_HAVE_QTHREAD)
if (Kokkos::Impl::is_same< Kokkos::Qthread, ExecutionSpace >::value){
return Exec_QTHREADS;
}
#endif
return Exec_SERIAL;
}
inline int kk_get_suggested_vector_size(
const size_t nr, const size_t nnz, const ExecSpaceType exec_space){
int suggested_vector_size_ = 1;
switch (exec_space){
default:
break;
case Exec_SERIAL:
case Exec_OMP:
case Exec_PTHREADS:
case Exec_QTHREADS:
break;
case Exec_CUDA:
suggested_vector_size_ = nnz / double (nr) + 0.5;
if (suggested_vector_size_ < 3){
suggested_vector_size_ = 2;
}
else if (suggested_vector_size_ <= 6){
suggested_vector_size_ = 4;
}
else if (suggested_vector_size_ <= 12){
suggested_vector_size_ = 8;
}
else if (suggested_vector_size_ <= 24){
suggested_vector_size_ = 16;
}
else {
suggested_vector_size_ = 32;
}
break;
}
return suggested_vector_size_;
}
inline int kk_get_suggested_team_size(const int vector_size, const ExecSpaceType exec_space){
if (exec_space == KokkosKernels::Experimental::Util::Exec_CUDA){
return 256 / vector_size;
}
else {
return 1;
}
}
}
}
}
#endif
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