
Get Some Topology Information(3) Hardware Locality (hwloc) Get Some Topology Information(3)
NAME
Get Some Topology Information 
Enumerations
enum hwloc_get_type_depth_e { HWLOC_TYPE_DEPTH_UNKNOWN, HWLOC_TYPE_DEPTH_MULTIPLE,
HWLOC_TYPE_DEPTH_BRIDGE, HWLOC_TYPE_DEPTH_PCI_DEVICE, HWLOC_TYPE_DEPTH_OS_DEVICE }
Functions
unsigned hwloc_topology_get_depth (hwloc_topology_t restrict topology)
int hwloc_get_type_depth (hwloc_topology_t topology, hwloc_obj_type_t type)
hwloc_obj_type_t hwloc_get_depth_type (hwloc_topology_t topology, unsigned depth)
unsigned hwloc_get_nbobjs_by_depth (hwloc_topology_t topology, unsigned depth)
static inline int hwloc_get_nbobjs_by_type (hwloc_topology_t topology, hwloc_obj_type_t
type)
int hwloc_topology_is_thissystem (hwloc_topology_t restrict topology)
unsigned long hwloc_topology_get_flags (hwloc_topology_t topology)
Detailed Description
Be sure to see the figure in termsanddefs that shows a complete topology tree, including
depths, child/sibling/cousin relationships, and an example of an asymmetric topology where
one socket has fewer caches than its peers.
Enumeration Type Documentation
enum hwloc_get_type_depth_e
Enumerator
HWLOC_TYPE_DEPTH_UNKNOWN
No object of given type exists in the topology.
HWLOC_TYPE_DEPTH_MULTIPLE
Objects of given type exist at different depth in the topology.
HWLOC_TYPE_DEPTH_BRIDGE
Virtual depth for bridge object level.
HWLOC_TYPE_DEPTH_PCI_DEVICE
Virtual depth for PCI device object level.
HWLOC_TYPE_DEPTH_OS_DEVICE
Virtual depth for software device object level.
Function Documentation
hwloc_obj_type_t hwloc_get_depth_type (hwloc_topology_ttopology, unsigneddepth)
Returns the type of objects at depth depth. Returns:
1 if depth depth does not exist.
unsigned hwloc_get_nbobjs_by_depth (hwloc_topology_ttopology, unsigneddepth)
Returns the width of level at depth depth.
static inline int hwloc_get_nbobjs_by_type (hwloc_topology_ttopology, hwloc_obj_type_ttype)
[static]
Returns the width of level type type. If no object for that type exists, 0 is returned. If
there are several levels with objects of that type, 1 is returned.
int hwloc_get_type_depth (hwloc_topology_ttopology, hwloc_obj_type_ttype)
Returns the depth of objects of type type. If no object of this type is present on the
underlying architecture, or if the OS doesn't provide this kind of information, the
function returns HWLOC_TYPE_DEPTH_UNKNOWN.
If type is absent but a similar type is acceptable, see also
hwloc_get_type_or_below_depth() and hwloc_get_type_or_above_depth().
If some objects of the given type exist in different levels, for instance L1 and L2
caches, or L1i and L1d caches, the function returns HWLOC_TYPE_DEPTH_MULTIPLE. See
hwloc_get_cache_type_depth() in hwloc/helper.h to better handle this case.
If an I/O object type is given, the function returns a virtual value because I/O objects
are stored in special levels that are not CPUrelated. This virtual depth may be passed to
other hwloc functions such as hwloc_get_obj_by_depth() but it should not be considered as
an actual depth by the application. In particular, it should not be compared with any
other object depth or with the entire topology depth.
unsigned hwloc_topology_get_depth (hwloc_topology_t restricttopology)
Get the depth of the hierarchical tree of objects. This is the depth of HWLOC_OBJ_PU
objects plus one.
unsigned long hwloc_topology_get_flags (hwloc_topology_ttopology)
Get OR'ed flags of a topology. Get the OR'ed set of hwloc_topology_flags_e of a topology.
Returns:
the flags previously set with hwloc_topology_set_flags().
int hwloc_topology_is_thissystem (hwloc_topology_t restricttopology)
Does the topology context come from this system? Returns:
1 if this topology context was built using the system running this program.
0 instead (for instance if using another filesystem root, a XML topology file, or a
synthetic topology).
Author
Generated automatically by Doxygen for Hardware Locality (hwloc) from the source code.
Version 1.7 Sun Apr 7 2013 Get Some Topology Information(3) 
