Dear Jan,
eddy is not written for multi-GPU use. Each eddy job will use only one GPU. But you should be able to launch multiple eddy jobs on the same node, and each new job should use a different GPU as long as they are set to run in exclusive mode.
Jesper
> On 16 Jan 2019, at 08:57, Jan Schreiber <[log in to unmask]> wrote:
>
> Dear experts,
>
> I am using eddy_cuda80 from the FSL 5.0.11 patch download site.
> It gives great results but I am wondering if it is possible (and how) to make it use all 4 GPU cores installed in our machine.
>
> I tried `export CUDA_VISIBLE_DEVICES=0,1,2,3` but that did not work.
>
> Thank you very much.
>
> Cheers,
> Jan
>
>
> +-----------------------------------------------------------------------------+
> | NVIDIA-SMI 390.67 Driver Version: 390.67 |
> |-------------------------------+----------------------+----------------------+
> | GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
> | Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
> |===============================+======================+======================|
> | 0 Tesla P100-PCIE... Off | 00000000:3B:00.0 Off | 0 |
> | N/A 41C P0 50W / 250W | 577MiB / 16280MiB | 42% Default |
> +-------------------------------+----------------------+----------------------+
> | 1 Tesla P100-PCIE... Off | 00000000:5E:00.0 Off | 0 |
> | N/A 31C P0 26W / 250W | 10MiB / 16280MiB | 0% Default |
> +-------------------------------+----------------------+----------------------+
> | 2 Tesla P100-PCIE... Off | 00000000:86:00.0 Off | 0 |
> | N/A 32C P0 25W / 250W | 10MiB / 16280MiB | 0% Default |
> +-------------------------------+----------------------+----------------------+
> | 3 Tesla P100-PCIE... Off | 00000000:AF:00.0 Off | 0 |
> | N/A 29C P0 25W / 250W | 10MiB / 16280MiB | 0% Default |
> +-------------------------------+----------------------+----------------------+
>
> +-----------------------------------------------------------------------------+
> | Processes: GPU Memory |
> | GPU PID Type Process name Usage |
> |=============================================================================|
> | 0 124873 C eddy_cuda80 551MiB |
> +-----------------------------------------------------------------------------+
>
>
>
> ########################################################################
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