hwlocality_opencl(3) Hardware Locality (hwloc) hwlocality_opencl(3)NAME
hwlocality_opencl - Interoperability with OpenCL
Functions
static int hwloc_opencl_get_device_cpuset (hwloc_topology_t topology,
cl_device_id device, hwloc_cpuset_t set)
static hwloc_obj_t hwloc_opencl_get_device_osdev_by_index
(hwloc_topology_t topology, unsigned platform_index, unsigned
device_index)
static hwloc_obj_t hwloc_opencl_get_device_osdev (hwloc_topology_t
topology, cl_device_id device)
Detailed Description
This interface offers ways to retrieve topology information about
OpenCL devices.
Only the AMD OpenCL interface currently offers useful locality
information about its devices.
Function Documentation
static int hwloc_opencl_get_device_cpuset (hwloc_topology_t topology,
cl_device_id device, hwloc_cpuset_t set) [inline], [static]
Get the CPU set of logical processors that are physically close to
OpenCL device device. Return the CPU set describing the locality of the
OpenCL device device.
Topology topology and device device must match the local machine. I/O
devices detection and the OpenCL 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_opencl_get_device_osdev() and
hwloc_opencl_get_device_osdev_by_index().
This function is currently only implemented in a meaningful way for
Linux with the AMD OpenCL implementation; other systems will simply get
a full cpuset.
static hwloc_obj_t hwloc_opencl_get_device_osdev (hwloc_topology_t
topology, cl_device_id device) [inline], [static]
Get the hwloc OS device object corresponding to OpenCL device device.
Return the hwloc OS device object that describes the given OpenCL
device device. Return NULL if there is none.
Topology topology and device device must match the local machine. I/O
devices detection and the OpenCL component must be enabled in the
topology. If not, the locality of the object may still be found using
hwloc_opencl_get_device_cpuset().
Note:
The corresponding hwloc PCI device may be found by looking at the
result parent pointer.
static hwloc_obj_t hwloc_opencl_get_device_osdev_by_index (hwloc_topology_t
topology, unsigned platform_index, unsigned device_index) [inline],
[static]
Get the hwloc OS device object corresponding to the OpenCL device for
the given indexes. Return the OS device object describing the OpenCL
device whose platform index is platform_index, and whose device index
within this platform if device_index. 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 and the OpenCL 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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the source code.
Version 1.11.1 Thu Oct 15 2015 hwlocality_opencl(3)
