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Portable Hardware Locality (hwloc) Documentation: v1.3

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Finding Objects Inside a CPU set

Functions

static inline hwloc_obj_t hwloc_get_first_largest_obj_inside_cpuset (hwloc_topology_t topology, hwloc_const_cpuset_t set)
 Get the first largest object included in the given cpuset set.
int hwloc_get_largest_objs_inside_cpuset (hwloc_topology_t topology, hwloc_const_cpuset_t set, hwloc_obj_t *restrict objs, int max)
 Get the set of largest objects covering exactly a given cpuset set.
static inline hwloc_obj_t hwloc_get_next_obj_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set, unsigned depth, hwloc_obj_t prev)
 Return the next object at depth depth included in CPU set set.
static inline hwloc_obj_t hwloc_get_next_obj_inside_cpuset_by_type (hwloc_topology_t topology, hwloc_const_cpuset_t set, hwloc_obj_type_t type, hwloc_obj_t prev)
 Return the next object of type type included in CPU set set.
static inline
hwloc_obj_t
 
hwloc_get_obj_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set, unsigned depth, unsigned idx)
 Return the (logically) idx -th object at depth depth included in CPU set set.
static inline
hwloc_obj_t
 
hwloc_get_obj_inside_cpuset_by_type (hwloc_topology_t topology, hwloc_const_cpuset_t set, hwloc_obj_type_t type, unsigned idx)
 Return the idx -th object of type type included in CPU set set.
static inline unsigned
 
hwloc_get_nbobjs_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set, unsigned depth)
 Return the number of objects at depth depth included in CPU set set.
static inline int
 
hwloc_get_nbobjs_inside_cpuset_by_type (hwloc_topology_t topology, hwloc_const_cpuset_t set, hwloc_obj_type_t type)
 Return the number of objects of type type included in CPU set set.

Function Documentation

static inline hwloc_obj_t hwloc_get_first_largest_obj_inside_cpuset ( hwloc_topology_t  topology,
hwloc_const_cpuset_t  set 
) [static]

Get the first largest object included in the given cpuset set.

Returns:
the first object that is included in set and whose parent is not.

This is convenient for iterating over all largest objects within a CPU set by doing a loop getting the first largest object and clearing its CPU set from the remaining CPU set.

int hwloc_get_largest_objs_inside_cpuset ( hwloc_topology_t  topology,
hwloc_const_cpuset_t  set,
hwloc_obj_t *restrict  objs,
int  max 
)

Get the set of largest objects covering exactly a given cpuset set.

Returns:
the number of objects returned in objs.
static inline unsigned hwloc_get_nbobjs_inside_cpuset_by_depth ( hwloc_topology_t  topology,
hwloc_const_cpuset_t  set,
unsigned  depth 
) [static]

Return the number of objects at depth depth included in CPU set set.

static inline int hwloc_get_nbobjs_inside_cpuset_by_type ( hwloc_topology_t  topology,
hwloc_const_cpuset_t  set,
hwloc_obj_type_t  type 
) [static]

Return the number of objects of type type included in CPU set set.

If no object for that type exists inside CPU set set, 0 is returned. If there are several levels with objects of that type inside CPU set set, -1 is returned.

static inline hwloc_obj_t hwloc_get_next_obj_inside_cpuset_by_depth ( hwloc_topology_t  topology,
hwloc_const_cpuset_t  set,
unsigned  depth,
hwloc_obj_t  prev 
) [static]

Return the next object at depth depth included in CPU set set.

If prev is NULL, return the first object at depth depth included in set. The next invokation should pass the previous return value in prev so as to obtain the next object in set.

static inline hwloc_obj_t hwloc_get_next_obj_inside_cpuset_by_type ( hwloc_topology_t  topology,
hwloc_const_cpuset_t  set,
hwloc_obj_type_t  type,
hwloc_obj_t  prev 
) [static]

Return the next object of type type included in CPU set set.

If there are multiple or no depth for given type, return NULL and let the caller fallback to hwloc_get_next_obj_inside_cpuset_by_depth().

static inline hwloc_obj_t hwloc_get_obj_inside_cpuset_by_depth ( hwloc_topology_t  topology,
hwloc_const_cpuset_t  set,
unsigned  depth,
unsigned  idx 
) [static]

Return the (logically) idx -th object at depth depth included in CPU set set.

static inline hwloc_obj_t hwloc_get_obj_inside_cpuset_by_type ( hwloc_topology_t  topology,
hwloc_const_cpuset_t  set,
hwloc_obj_type_t  type,
unsigned  idx 
) [static]

Return the idx -th object of type type included in CPU set set.

If there are multiple or no depth for given type, return NULL and let the caller fallback to hwloc_get_obj_inside_cpuset_by_depth().