This interface offers ways to retrieve topology information about devices managed by the Level Zero API.
◆ hwloc_levelzero_get_device_cpuset()
Get the CPU set of logical processors that are physically close to the Level Zero device device
.
Store in set
the CPU-set describing the locality of the Level Zero device device
.
Topology topology
and device device
must match the local machine. The Level Zero library must have been initialized with Sysman enabled (by calling zesInit(0) if supported, or by setting ZES_ENABLE_SYSMAN=1 in the environment). I/O devices detection and the Level Zero component are not needed in the topology.
The function only returns the locality of the device. If more information about the device is needed, OS objects should be used instead, see hwloc_levelzero_get_device_osdev().
This function is currently only implemented in a meaningful way for Linux; other systems will simply get a full cpuset.
- Returns
- 0 on success.
-
-1 on error, for instance if device information could not be found.
◆ hwloc_levelzero_get_device_osdev()
Get the hwloc OS device object corresponding to Level Zero device device
.
- Returns
- The hwloc OS device object that describes the given Level Zero device
device
.
-
NULL
if none could be found.
Topology topology
and device dv_ind
must match the local machine. I/O devices detection and the Level Zero component must be enabled in the topology. If not, the locality of the object may still be found using hwloc_levelzero_get_device_cpuset().
- Note
- The corresponding hwloc PCI device may be found by looking at the result parent pointer (unless PCI devices are filtered out).