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 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.

   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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