GPU computing in spmd

2011 12 15
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Hi, I have two computers with cuda enable gpus when I run "gpuArray" locally, it workes well but when I run it in SPMD statement on 2 computers it shows this error: " No device supporting CUDA was found." if I want to have a cluster of GPUs what can I do? Thanks

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Edric Ellis
Edric Ellis 2011-12-15
What OS are cluster machines running? What GPUs and drivers are installed? What scheduler are you using?
Aseman
Aseman 2011-12-15
OS:64 bit Win7
GPU:GeForce GT 430
Driver:285.62-desktop-win7-64bit
scheduler:Jobmanager
Is it possible to use a GPU command in spmd on cluster?

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Jason Ross
Jason Ross 2011-12-15

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This should work, since it looks like that card supports TCC mode.
You can check (and change) this with the nvidia-smi utility, which should be in with the files that came with the driver in a directory called "NVSMI"

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Aseman
Aseman 2011-12-16
Thanks for your answers
whould you please help me more ,what should I exactly do?
Jason Ross
Jason Ross 2011-12-16
c:\Program Files\NVIDIA Corporation\NVSMI>nvidia-smi --query
In the output, you'll see something like the following for your GT430:
GPU 0:8:0
Product Name : Tesla C1060
Display Mode : Disabled
Persistence Mode : N/A
Driver Model
Current : TCC
Pending : TCC
Then you can set the mode to TCC using the following. You can get the gpu id from the --query output
nvidia-smi --id=<gpu id> --driver-model=TCC
The GPU will now be in TCC mode and used for computation, and should be available.
Jason Ross
Jason Ross 2011-12-16
A small clarification: The output above is abbreviated, and the actual information will be different for a GT430, but you should end up in the "TCC" state. I'm guessing it will be in the "WDDM" driver model.
Aseman
Aseman 2011-12-17
Thanks for your answer I will check it and feedback but I think TCC mode is a feature of tesla cards.
Jason Ross
Jason Ross 2011-12-19
Yes, that looks to be the case with this card on Windows:
http://nvidia.custhelp.com/app/answers/detail/a_id/2595/kw/tcc/session/L3RpbWUvMTMyNDMzMDA1NC9zaWQvR0pDaUpfTGs%3D

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Friedrich
Friedrich 2011-12-15

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Hi,
the doc says the following:
Access from a MATLAB worker running on a Microsoft Windows operating system with a job manager as the scheduler, requires an NVIDIA Tesla Compute Cluster (TCC) driver with an NVIDIA Tesla card.
http://www.mathworks.com/help/releases/R2011b/toolbox/distcomp/bsic3by-1.html#bsiqdwh

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