Stefan (or anybody else interested in hwloc GPU support), Did you have any chance to look at this? Brice
Le 01/02/2013 14:57, Brice Goglin a écrit : > I just committed big changes to the display branch (and I also merged > latest trunk changes). > > lstopo will now report things like this: > PCI 10de:06d1 > GPU L#0 ":0.0" > GPU L#1 "cuda0" > GPU L#2 "nvml0" > > > The changes include: > > 1) We don't have a "display" specific OS device anymore, it's just > another kind of GPU among cuda, opencl and nvml. The name is the X > server display name. There are string attributes in these new GL GPU OS > devices (lstopo -v): > GPU L#9 (Backend=GL GPUVendor="NVIDIA Corporation" GPUModel="Tesla > C2050") ":0.2" > > 2) The gl component is now buildable as a plugin > > 3) Given (2), we can't expose internal GL routines in the public API. So > hwloc/gl.h is just made of inline helpers as any other hwloc/foo.h. It > now contains functions to convert between displays (name or port/device) > and hwloc OS devices: > > hwloc_obj_t hwloc_gl_get_display_osdev_by_port_device(hwloc_topology_t > topology, unsigned port, unsigned device) > hwloc_obj_t hwloc_gl_get_display_osdev_by_name(hwloc_topology_t > topology, const char *name) > int hwloc_gl_get_display_by_osdev(hwloc_topology_t topology, hwloc_obj_t > osdev,unsigned *port, unsigned *device) > > If you really need the PCI device, just use osdev->parent as documented. > If you need the locality, use hwloc_get_non_io_ancestor(topology, > osdev)->cpuset > See tests/gl.c for examples. > > Please review hwloc/gl.h and let me know if that works for you. I hope I > used the words port/device/server/screen as expected. > > The last thing on my TODO list is to decide is whether we keep the "GL" > name or switch to something among display/X11/X/... for filenames and > function names. > > Brice >
