[OMPI users] Can displs in Scatterv/Gatherv/etc be a GPU array for CUDA-aware MPI?

2019-06-11 Thread Fang, Leo via users
Hello, I understand that once Open MPI is built against CUDA, sendbuf/recvbuf can be pointers to GPU memory. I wonder whether or not the “displs" argument of the collective calls on variable data (Scatterv/Gatherv/etc) can also live on GPU. CUDA awareness isn’t part of the MPI standard (yet),

Re: [OMPI users] Can displs in Scatterv/Gatherv/etc be a GPU array for CUDA-aware MPI?

2019-06-11 Thread Fang, Leo via users
cess to both. Moreover, as you mention your code will not be portable anymore. George. On Tue, Jun 11, 2019 at 11:27 AM Fang, Leo via users mailto:users@lists.open-mpi.org>> wrote: Hello, I understand that once Open MPI is built against CUDA, sendbuf/recvbuf can be pointers to GP

Re: [OMPI users] CUDA supported APIs

2019-08-19 Thread Fang, Leo via users
Hi Junchao, First, for your second question, the answer is here: https://www.mail-archive.com/users@lists.open-mpi.org/msg33279.html. I know this because I also asked it earlier  It'd be nice to have this documented in the Q though. As for your first question, I am also interested. It'd