hwlocality_levelzero(3) Hardware Locality (hwloc) hwlocality_levelzero(3)
NAME
hwlocality_levelzero - Interoperability with the oneAPI Level Zero
interface.
SYNOPSIS
Functions
static int hwloc_levelzero_get_device_cpuset (hwloc_topology_t
topology, ze_device_handle_t device, hwloc_cpuset_t set)
static hwloc_obj_t hwloc_levelzero_get_device_osdev (hwloc_topology_t
topology, ze_device_handle_t device)
Detailed Description
This interface offers ways to retrieve topology information about
devices managed by the Level Zero API.
Function Documentation
static int hwloc_levelzero_get_device_cpuset (hwloc_topology_t topology,
ze_device_handle_t device, hwloc_cpuset_t set) [inline], [static]
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 must have been initialized with Sysman enabled
(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.
static hwloc_obj_t hwloc_levelzero_get_device_osdev (hwloc_topology_t
topology, ze_device_handle_t device) [inline], [static]
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).
Author
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Version 2.7.0 Thu Jun 16 2022 hwlocality_levelzero(3)
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