[mvapich-discuss] code fails running on GPUs attached to different sockets

[khaled hamidouche]

Hi Enrico,

Can you please provide a  simple reproducer to the issue, that we can debug
it further.

I'm also CC'ing the internal list. We will move further discussion to this
list.

Thanks

On Mon, Apr 18, 2016 at 1:00 PM, Enrico Calore <enrico.calore at fe.infn.it>
wrote:

> On 04/18/2016 05:20 PM, Sebastiano Fabio Schifano wrote:
> > Hi Khaled,
> >
> > leaving MV2_USE_SHARED_MEM set to the default value:
> >
> > - setting MV2_USE_GPUDIRECT_LOOPBACK=0 the code gives the right result,
> > - while setting MV2_CUDA_NONBLOCKING_STREAMS=0 the code gives a wrong
>
> Hi,
> is there somewhere some documentation about what these variables
> control? And/or some documentation about all the available variables?
>
> For example in the Mellanox GPUDirect User Manual another variable
> called MV2_USE_GPUDIRECT is mentioned, but I can not find any reference
> in the mvapich documentation.
>
>
> Thanks and Best regards,
>
> Enrico
>
>
>
>
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