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Subject: Re: [OMPI devel] GPUDirect v1 issues
From: Rolf vandeVaart (rvandevaart_at_[hidden])
Date: 2012-01-17 09:53:56


I am not aware of any issues. Can you send me a test program and I can try it out?
Which version of CUDA are you using?

Rolf

>-----Original Message-----
>From: devel-bounces_at_[hidden] [mailto:devel-bounces_at_[hidden]]
>On Behalf Of Sebastian Rinke
>Sent: Tuesday, January 17, 2012 8:50 AM
>To: Open MPI Developers
>Subject: [OMPI devel] GPUDirect v1 issues
>
>Dear all,
>
>I'm using GPUDirect v1 with Open MPI 1.4.3 and experience blocking
>MPI_SEND/RECV to block forever.
>
>For two subsequent MPI_RECV, it hangs if the recv buffer pointer of the
>second recv points to somewhere, i.e. not at the beginning, in the recv buffer
>(previously allocated with cudaMallocHost()).
>
>I tried the same with MVAPICH2 and did not see the problem.
>
>Does anybody know about issues with GPUDirect v1 using Open MPI?
>
>Thanks for your help,
>Sebastian
>_______________________________________________
>devel mailing list
>devel_at_[hidden]
>http://www.open-mpi.org/mailman/listinfo.cgi/devel
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