This interface offers ways to retrieve topology information about devices managed by the NVIDIA Management Library (NVML).
◆ hwloc_nvml_get_device_cpuset()
Get the CPU set of processors that are physically close to NVML device device
.
Store in set
the CPU-set describing the locality of the NVML device device
.
Topology topology
and device device
must match the local machine. I/O devices detection and the NVML 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_nvml_get_device_osdev() and hwloc_nvml_get_device_osdev_by_index().
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_nvml_get_device_osdev()
Get the hwloc OS device object corresponding to NVML device device
.
- Returns
- The hwloc OS device object that describes the given NVML device
device
.
-
NULL
if none could be found.
Topology topology
and device device
must match the local machine. I/O devices detection and the NVML component must be enabled in the topology. If not, the locality of the object may still be found using hwloc_nvml_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).
◆ hwloc_nvml_get_device_osdev_by_index()
Get the hwloc OS device object corresponding to the NVML device whose index is idx
.
- Returns
- The hwloc OS device object describing the NVML device whose index is
idx
.
-
NULL
if none could be found.
The topology topology
does not necessarily have to match the current machine. For instance the topology may be an XML import of a remote host. I/O devices detection and the NVML component must be enabled in the topology.
- Note
- The corresponding PCI device object can be obtained by looking at the OS device parent object (unless PCI devices are filtered out).