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Portable Hardware Locality (hwloc) Documentation: v1.8

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Finding Objects inside a CPU set

Functions

static __hwloc_inline hwloc_obj_t hwloc_get_first_largest_obj_inside_cpuset (hwloc_topology_t topology, hwloc_const_cpuset_t set)
 
HWLOC_DECLSPEC int hwloc_get_largest_objs_inside_cpuset (hwloc_topology_t topology, hwloc_const_cpuset_t set, hwloc_obj_t *__hwloc_restrict objs, int max)
 
static __hwloc_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 __hwloc_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 __hwloc_inline hwloc_obj_t hwloc_get_obj_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set, unsigned depth, unsigned idx) __hwloc_attribute_pure
 
static __hwloc_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) __hwloc_attribute_pure
 
static __hwloc_inline unsigned hwloc_get_nbobjs_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set, unsigned depth) __hwloc_attribute_pure
 
static __hwloc_inline int hwloc_get_nbobjs_inside_cpuset_by_type (hwloc_topology_t topology, hwloc_const_cpuset_t set, hwloc_obj_type_t type) __hwloc_attribute_pure
 
static __hwloc_inline int hwloc_get_obj_index_inside_cpuset (hwloc_topology_t topology __hwloc_attribute_unused, hwloc_const_cpuset_t set, hwloc_obj_t obj) __hwloc_attribute_pure
 

Detailed Description

Function Documentation

static __hwloc_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.

Note
This function cannot work if the root object does not have a CPU set, e.g. if the topology is made of different machines.
HWLOC_DECLSPEC int hwloc_get_largest_objs_inside_cpuset ( hwloc_topology_t  topology,
hwloc_const_cpuset_t  set,
hwloc_obj_t *__hwloc_restrict  objs,
int  max 
)

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

Returns
the number of objects returned in objs.
Note
This function cannot work if the root object does not have a CPU set, e.g. if the topology is made of different machines.
static __hwloc_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.

Note
This function cannot work if objects at the given depth do not have CPU sets or if the topology is made of different machines.
static __hwloc_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.

Note
This function cannot work if objects of the given type do not have CPU sets or if the topology is made of different machines.
static __hwloc_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.

Note
This function cannot work if objects at the given depth do not have CPU sets or if the topology is made of different machines.
static __hwloc_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().

Note
This function cannot work if objects of the given type do not have CPU sets or if the topology is made of different machines.
static __hwloc_inline int hwloc_get_obj_index_inside_cpuset ( hwloc_topology_t topology  __hwloc_attribute_unused,
hwloc_const_cpuset_t  set,
hwloc_obj_t  obj 
)
static

Return the logical index among the objects included in CPU set set.

Consult all objects in the same level as obj and inside CPU set set in the logical order, and return the index of obj within them. If set covers the entire topology, this is the logical index of obj. Otherwise, this is similar to a logical index within the part of the topology defined by CPU set set.

static __hwloc_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.

Note
This function cannot work if objects at the given depth do not have CPU sets or if the topology is made of different machines.
static __hwloc_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().

Note
This function cannot work if objects of the given type do not have CPU sets or if the topology is made of different machines.