Leo, Thanks for the info. That is interesting. And yes, Having a CUDA aware MPI API list would be very useful. --Junchao Zhang
On Mon, Aug 19, 2019 at 10:23 AM Fang, Leo <leof...@bnl.gov<mailto:leof...@bnl.gov>> wrote: 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&A though. As for your first question, I am also interested. It'd be nice for Open MPI core devs to keep the supported API list up-to-date. We recently added support of CUDA-aware MPI to mpi4py, and such a list is important for us to keep track upstream support so that we know whether a test fails due to lack of CUDA-awareness or because we messed up (much less likely). Thanks. Sincerely, Leo --- Yao-Lung Leo Fang Assistant Computational Scientist Computational Science Initiative Brookhaven National Laboratory Bldg. 725, Room 2-169 P.O. Box 5000, Upton, NY 11973-5000 Office: (631) 344-3265 Email: leof...@bnl.gov<mailto:leof...@bnl.gov> Website: https://leofang.github.io/ ________________________________ 寄件者: users <users-boun...@lists.open-mpi.org<mailto:users-boun...@lists.open-mpi.org>> 代表 Zhang, Junchao via users <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> 寄件日期: 2019年8月15日 上午 11:52:56 收件者: Open MPI Users <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> 副本: Zhang, Junchao <jczh...@mcs.anl.gov<mailto:jczh...@mcs.anl.gov>> 主旨: Re: [OMPI users] CUDA supported APIs Another question: If MPI_Allgatherv(const void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, const int recvcounts[],const int displs[], MPI_Datatype recvtype, MPI_Comm comm) is cuda aware, are recvcounts, displs in CPU memory or GPU memory? --Junchao Zhang On Thu, Aug 15, 2019 at 9:55 AM Junchao Zhang <jczh...@mcs.anl.gov<mailto:jczh...@mcs.anl.gov>> wrote: Hi, Are the APIs at https://www.open-mpi.org/faq/?category=runcuda#mpi-apis-cuda<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.open-2Dmpi.org_faq_-3Fcategory-3Druncuda-23mpi-2Dapis-2Dcuda&d=DwMGaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=xdA_wfZm0r4KH07in_vhZg&m=RZswVqXwi-LuVtqni8ecrzkJU3WCkvSRUw1u7n32neQ&s=FKXyPpx3kLJRAQirASnnXD2Q-HLG3G0XMwvXmJ4sPdQ&e=> latest? I could not find MPI_Neighbor_xxx and MPI_Reduce_local. Thanks. --Junchao Zhang
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