Kokkos Core Kernels Package  Version of the Day
Kokkos_hwloc.hpp
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44 
45 #ifndef KOKKOS_HWLOC_HPP
46 #define KOKKOS_HWLOC_HPP
47 
48 #include <Kokkos_Macros.hpp>
49 
50 #include <utility>
51 
52 namespace Kokkos {
53 
66 namespace hwloc {
67 
69 bool available();
70 
75 unsigned get_available_numa_count();
76 
82 
86 
87 } /* namespace hwloc */
88 } /* namespace Kokkos */
89 
90 //----------------------------------------------------------------------------
91 //----------------------------------------------------------------------------
92 // Internal functions for binding persistent spawned threads.
93 
94 namespace Kokkos {
95 namespace hwloc {
96 
106 unsigned thread_mapping(const char* const label, const bool allow_async,
107  unsigned& thread_count, unsigned& use_numa_count,
108  unsigned& use_cores_per_numa,
109  std::pair<unsigned, unsigned> threads_coord[]);
110 
120 std::pair<unsigned, unsigned> get_this_thread_coordinate();
121 
123 bool bind_this_thread(const std::pair<unsigned, unsigned>);
124 
126 bool can_bind_threads();
127 
132 unsigned bind_this_thread(const unsigned coordinate_count,
133  std::pair<unsigned, unsigned> coordinate[]);
134 
136 bool unbind_this_thread();
137 
138 } /* namespace hwloc */
139 } /* namespace Kokkos */
140 
141 //----------------------------------------------------------------------------
142 //----------------------------------------------------------------------------
143 
144 #endif /* #define KOKKOS_HWLOC_HPP */
bool bind_this_thread(const std::pair< unsigned, unsigned >)
Bind the current thread to a core.
bool can_bind_threads()
Can hwloc bind threads?
unsigned get_available_cores_per_numa()
Query number of available cores per NUMA regions. This will be less than the hardware capacity if the...
unsigned get_available_threads_per_core()
Query number of available "hard" threads per core; i.e., hyperthreads.
unsigned get_available_numa_count()
Query number of available NUMA regions. This will be less than the hardware capacity if the MPI proce...
std::pair< unsigned, unsigned > get_this_thread_coordinate()
Query core-coordinate of the current thread with respect to the core_topology.
bool unbind_this_thread()
Unbind the current thread back to the original process binding.
unsigned thread_mapping(const char *const label, const bool allow_async, unsigned &thread_count, unsigned &use_numa_count, unsigned &use_cores_per_numa, std::pair< unsigned, unsigned > threads_coord[])
Recommend mapping of threads onto cores.
bool available()
Query if hwloc is available.
Definition: dummy.cpp:3