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Kokkos_hwloc.hpp
00001 /*
00002 //@HEADER
00003 // ************************************************************************
00004 // 
00005 //   Kokkos: Manycore Performance-Portable Multidimensional Arrays
00006 //              Copyright (2012) Sandia Corporation
00007 // 
00008 // Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
00009 // the U.S. Government retains certain rights in this software.
00010 // 
00011 // Redistribution and use in source and binary forms, with or without
00012 // modification, are permitted provided that the following conditions are
00013 // met:
00014 //
00015 // 1. Redistributions of source code must retain the above copyright
00016 // notice, this list of conditions and the following disclaimer.
00017 //
00018 // 2. Redistributions in binary form must reproduce the above copyright
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00021 //
00022 // 3. Neither the name of the Corporation nor the names of the
00023 // contributors may be used to endorse or promote products derived from
00024 // this software without specific prior written permission.
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00041 //@HEADER
00042 */
00043 
00044 #ifndef KOKKOS_HWLOC_HPP
00045 #define KOKKOS_HWLOC_HPP
00046 
00047 #include <utility>
00048 
00049 namespace Kokkos {
00050 
00063 namespace hwloc {
00064 
00066 bool available();
00067 
00072 unsigned get_available_numa_count();
00073 
00078 unsigned get_available_cores_per_numa();
00079 
00081 unsigned get_available_threads_per_core();
00082 
00083 } /* namespace hwloc */
00084 } /* namespace Kokkos */
00085 
00086 //----------------------------------------------------------------------------
00087 //----------------------------------------------------------------------------
00088 // Internal functions for binding persistent spawned threads.
00089 
00090 namespace Kokkos {
00091 namespace hwloc {
00092 
00102 unsigned thread_mapping( const char * const label ,
00103                          const bool allow_async ,
00104                          unsigned & thread_count ,
00105                          unsigned & use_numa_count ,
00106                          unsigned & use_cores_per_numa ,
00107                          std::pair<unsigned,unsigned> threads_coord[] );
00108 
00118 std::pair<unsigned,unsigned> get_this_thread_coordinate();
00119 
00121 bool bind_this_thread( const std::pair<unsigned,unsigned> );
00122 
00127 unsigned bind_this_thread( const unsigned               coordinate_count ,
00128                            std::pair<unsigned,unsigned> coordinate[] );
00129 
00131 bool unbind_this_thread();
00132 
00133 } /* namespace hwloc */
00134 } /* namespace Kokkos */
00135 
00136 //----------------------------------------------------------------------------
00137 //----------------------------------------------------------------------------
00138 
00139 #endif /* #define KOKKOS_HWLOC_HPP */
00140 
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