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Portable Hardware Locality (hwloc) Documentation: v1.8

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Interoperability with Intel Xeon Phi (MIC)

Functions

static __hwloc_inline int hwloc_intel_mic_get_device_cpuset (hwloc_topology_t topology __hwloc_attribute_unused, int idx __hwloc_attribute_unused, hwloc_cpuset_t set)
 
static __hwloc_inline hwloc_obj_t hwloc_intel_mic_get_device_osdev_by_index (hwloc_topology_t topology, unsigned idx)
 

Detailed Description

This interface offers ways to retrieve topology information about Intel Xeon Phi (MIC) devices.

Function Documentation

static __hwloc_inline int hwloc_intel_mic_get_device_cpuset ( hwloc_topology_t topology  __hwloc_attribute_unused,
int idx  __hwloc_attribute_unused,
hwloc_cpuset_t  set 
)
static

Get the CPU set of logical processors that are physically close to MIC device whose index is idx.

Return the CPU set describing the locality of the MIC device whose index is idx.

Topology topology and device index idx must match the local machine. I/O devices detection is 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_intel_mic_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_inline hwloc_obj_t hwloc_intel_mic_get_device_osdev_by_index ( hwloc_topology_t  topology,
unsigned  idx 
)
static

Get the hwloc OS device object corresponding to the MIC device for the given index.

Return the OS device object describing the MIC device whose index is idx. Return 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 must be enabled in the topology.

Note
The corresponding PCI device object can be obtained by looking at the OS device parent object.