This interface offers ways to retrieve topology information about OpenGL displays.
Only the NVIDIA display locality information is currently available, using the NV-CONTROL X11 extension and the NVCtrl library.
◆ hwloc_gl_get_display_by_osdev()
Get the OpenGL display port and device corresponding to the given hwloc OS object.
Retrieves the OpenGL display port (server) in port
and device (screen) in screen
that correspond to the given hwloc OS device object.
- Returns
- 0 on success.
-
-1 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 GL component must be enabled in the topology.
◆ hwloc_gl_get_display_osdev_by_name()
Get the hwloc OS device object corresponding to the OpenGL display given by name.
- Returns
- The hwloc OS device object describing the OpenGL display whose name is
name
, built as ":port.device" such as ":0.0" .
-
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 GL 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).
◆ hwloc_gl_get_display_osdev_by_port_device()
Get the hwloc OS device object corresponding to the OpenGL display given by port and device index.
- Returns
- The hwloc OS device object describing the OpenGL display whose port (server) is
port
and device (screen) is device
.
-
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 GL 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).