hwlocality_helper_nodeset_convert(3)

NAME
hwlocality_helper_nodeset_convert - Converting between CPU sets and node sets

  Functions
static void hwloc_cpuset_to_nodeset (hwloc_topology_t topology, hwloc_const_cpuset_t _cpuset, hwloc_nodeset_t nodeset)
static void hwloc_cpuset_to_nodeset_strict (struct hwloc_topology *topology, hwloc_const_cpuset_t _cpuset, hwloc_nodeset_t nodeset)
static void hwloc_cpuset_from_nodeset (hwloc_topology_t topology, hwloc_cpuset_t _cpuset, hwloc_const_nodeset_t nodeset)
static void hwloc_cpuset_from_nodeset_strict (struct hwloc_topology *topology, hwloc_cpuset_t _cpuset, hwloc_const_nodeset_t nodeset)

Detailed Description

There are two semantics for converting cpusets to nodesets depending on how non-NUMA machines are handled.

When manipulating nodesets for memory binding, non-NUMA machines should be considered as having a single NUMA node. The standard conversion routines below should be used so that marking the first bit of the nodeset means that memory should be bound to a non-NUMA whole machine.

When manipulating nodesets as an actual list of NUMA nodes without any need to handle memory binding on non-NUMA machines, the strict conversion routines may be used instead.

Function Documentation

  static void hwloc_cpuset_from_nodeset (hwloc_topology_t topology, hwloc_cpuset_t _cpuset, hwloc_const_nodeset_t nodeset) [inline], [static]

Convert a NUMA node set into a CPU set and handle non-NUMA cases. If the topology contains no NUMA nodes, the machine is considered as a single memory node, and the following behavior is used: If nodeset is empty, cpuset will be emptied as well. Otherwise cpuset will be entirely filled. This is useful for manipulating memory binding sets.

  static void hwloc_cpuset_from_nodeset_strict (struct hwloc_topology * topology, hwloc_cpuset_t _cpuset, hwloc_const_nodeset_t nodeset) [inline], [static]

Convert a NUMA node set into a CPU set without handling non-NUMA cases. This is the strict variant of hwloc_cpuset_from_nodeset(). It does not fix non-NUMA cases. If the topology contains some NUMA nodes, behave exactly the same. However, if the topology contains no NUMA nodes, return an empty cpuset.

  static void hwloc_cpuset_to_nodeset (hwloc_topology_t topology, hwloc_const_cpuset_t _cpuset, hwloc_nodeset_t nodeset) [inline], [static]

Convert a CPU set into a NUMA node set and handle non-NUMA cases. If some NUMA nodes have no CPUs at all, this function never sets their indexes in the output node set, even if a full CPU set is given in input.

If the topology contains no NUMA nodes, the machine is considered as a single memory node, and the following behavior is used: If cpuset is empty, nodeset will be emptied as well. Otherwise nodeset will be entirely filled.

  static void hwloc_cpuset_to_nodeset_strict (struct hwloc_topology * topology, hwloc_const_cpuset_t _cpuset, hwloc_nodeset_t nodeset) [inline], [static]

Convert a CPU set into a NUMA node set without handling non-NUMA cases. This is the strict variant of hwloc_cpuset_to_nodeset(). It does not fix non-NUMA cases. If the topology contains some NUMA nodes, behave exactly the same. However, if the topology contains no NUMA nodes, return an empty nodeset.

Author

Generated automatically by Doxygen for Hardware Locality (hwloc) from the source code.