Be sure to see the figure in Terms and Definitions 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.
No object of given type exists in the topology.
Objects of given type exist at different depth in the topology.
Virtual depth for bridge object level.
Virtual depth for PCI device object level.
Virtual depth for software device object level.
Returns the type of objects at depth
- -1 if depth
depth does not exist.
| unsigned hwloc_get_nbobjs_by_depth
Returns the width of level at depth
Returns the width of level type
If no object for that type exists, 0 is returned. If there are several levels with objects of that type, -1 is returned.
Returns the depth of objects of 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 CPU-related. 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.
Get the depth of the hierarchical tree of objects.
This is the depth of HWLOC_OBJ_PU objects plus one.
Does the topology context come from this system?
- 1 if this topology context was built using the system running this program.
0 instead (for instance if using another file-system root, a XML topology file, or a synthetic topology).