NAME

       hwlocality_gl - Interoperability with OpenGL displays

SYNOPSIS

   Functions
       static hwloc_obj_t hwloc_gl_get_display_osdev_by_port_device (hwloc_topology_t topology,
           unsigned port, unsigned device)
       static hwloc_obj_t hwloc_gl_get_display_osdev_by_name (hwloc_topology_t topology, const
           char *name)
       static int hwloc_gl_get_display_by_osdev (hwloc_topology_t topology, hwloc_obj_t osdev,
           unsigned *port, unsigned *device)

Detailed Description

       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.

Function Documentation

   static int hwloc_gl_get_display_by_osdev (hwloc_topology_t topology, hwloc_obj_t osdev,
       unsigned * port, unsigned * device) [inline],  [static]
       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
           -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.

   static hwloc_obj_t hwloc_gl_get_display_osdev_by_name (hwloc_topology_t topology, const char *
       name) [inline],  [static]
       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).

   static hwloc_obj_t hwloc_gl_get_display_osdev_by_port_device (hwloc_topology_t topology,
       unsigned port, unsigned device) [inline],  [static]
       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).

Author

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