Does "ldd /path/to/libhwloc.so" say that it depends on libcuda?
Check the end of the configure output, you should see "CUDA" on the
"probe/display I/O devices" line:
-----------------------------------------------------------------------------
Hwloc optional build support status (more details can be found above):
Probe / display I/O devices: PCI(pciaccess+linux) LinuxIO OpenCL CUDA NVML GL
Graphical output (Cairo): yes
XML input / output: full
Netloc functionality: yes (with scotch: no)
Plugin support: no
-----------------------------------------------------------------------------
If not, go above and look for CUDA checks:
checking for cuda.h... yes
checking if CUDA_VERSION >= 3020... yes
checking for cuInit in -lcuda... yes
checking cuda_runtime_api.h usability... yes
checking cuda_runtime_api.h presence... yes
checking for cuda_runtime_api.h... yes
checking if CUDART_VERSION >= 3020... yes
checking for cudaGetDeviceProperties in -lcudart... yes
Brice
Le 07/07/2017 23:36, David Solt a écrit :
> Ok here we have a machine with cuda installed:
>
> # rpm -qa | grep cuda
> cuda-nvgraph-8-0-8.0.54-1.ppc64le
> cuda-curand-dev-8-0-8.0.54-1.ppc64le
> cuda-nvrtc-dev-8-0-8.0.54-1.ppc64le
> cuda-cudart-8-0-8.0.54-1.ppc64le
> cuda-cusolver-dev-8-0-8.0.54-1.ppc64le
> cuda-8.0.54-1.ppc64le
> cuda-driver-dev-8-0-8.0.54-1.ppc64le
> cuda-core-8-0-8.0.54-1.ppc64le
> etc, etc, etc
>
> #lspci | grep NVIDIA
>
> [root@c712f6n06 ~]# lspci | grep NVI
> 0002:01:00.0 3D controller: NVIDIA Corporation GP100GL (rev a1)
> 0003:01:00.0 3D controller: NVIDIA Corporation GP100GL (rev a1)
> 0006:01:00.0 3D controller: NVIDIA Corporation GP100GL (rev a1)
> 0007:01:00.0 3D controller: NVIDIA Corporation GP100GL (rev a1)
>
> But the only devices returned by hwloc are named "cardX" (same as what
> lstopo shows) and have osdev.type of HWLOC_OBJ_OSDEV_GPU and we see no
> devices of type HWLOC_OBJ_OSDEV_COPROC
>
> Sorry, I'm sure I'm doing something stupid here... I'm certainly new
> to using hwloc.
>
> Dave
>
>
>
> From: Brice Goglin <brice.gog...@inria.fr>
> To: Hardware locality user list <hwloc-users@lists.open-mpi.org>
> Date: 07/07/2017 02:54 PM
> Subject: Re: [hwloc-users] Why do I get such little information
> back about GPU's on my system
> Sent by: "hwloc-users" <hwloc-users-boun...@lists.open-mpi.org>
> ------------------------------------------------------------------------
>
>
>
> Le 07/07/2017 21:51, David Solt a écrit :
> Oh, Geoff Paulsen will be there at Open MPI meeting and he can help
> with the discussion. We tried searching for
>
> // Iterate over each osdevice and identify the GPU's on each socket.
> while ((obj = hwloc_get_next_osdev(machine_topology, obj)) != NULL) {
> if (HWLOC_OBJ_OSDEV_COPROC == obj->attr->osdev.type) { // was
> HWLOC_OBJ_OSDEV_GPU
>
> Currently we are not finding any such devices. Does this require
> that the cuda libraries be installed on the system for hwloc to find
> the hardware?
>
> Yes. We use the cuda API for listing these objects.
> Brice
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>
>
>
>
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