hwlocality_nvml(3) Hardware Locality (hwloc) hwlocality_nvml(3)NAME
hwlocality_nvml - Interoperability with the NVIDIA Management Library
Functions
static int hwloc_nvml_get_device_cpuset (hwloc_topology_t topology,
nvmlDevice_t device, hwloc_cpuset_t set)
static hwloc_obj_t hwloc_nvml_get_device_osdev_by_index
(hwloc_topology_t topology, unsigned idx)
static hwloc_obj_t hwloc_nvml_get_device_osdev (hwloc_topology_t
topology, nvmlDevice_t device)
Detailed Description
This interface offers ways to retrieve topology information about
devices managed by the NVIDIA Management Library (NVML).
Function Documentation
static int hwloc_nvml_get_device_cpuset (hwloc_topology_t topology,
nvmlDevice_t device, hwloc_cpuset_t set) [inline], [static]
Get the CPU set of logical processors that are physically close to NVML
device device. Return 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.
static hwloc_obj_t hwloc_nvml_get_device_osdev (hwloc_topology_t topology,
nvmlDevice_t device) [inline], [static]
Get the hwloc OS device object corresponding to NVML device device.
Return the hwloc OS device object that describes the given NVML device
device. Return NULL if there is none.
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.
static hwloc_obj_t hwloc_nvml_get_device_osdev_by_index (hwloc_topology_t
topology, unsigned idx) [inline], [static]
Get the hwloc OS device object corresponding to the NVML device whose
index is idx. Return the OS device object describing the NVML device
whose index is idx. Returns NULL if there is none.
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.
Author
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Version 1.11.1 Thu Oct 15 2015 hwlocality_nvml(3)
