[mvapich-discuss] Problem with mulitiple gpus' send/recv task

[feiyulv at mail.ustc.edu.cn]

All
  I'm trying to use two MPI processes to control 4 gpu's send/recv between two servers, the procedure is shown as follows:

Server1                                                              Server2

 

(GPU1)  tid1 – MPI_Send  ----------------------à       (GPU2)  tid2 – MPI_Recv

 

(GPU2)  tid2 – MPI_Recv  ß----------------------       (GPU1)  tid1– MPI_Send



   However, I got a cuda error 33 when implementing it on mvapich2.0-gdr. Does one mpi process can just control one gpu to send/recv message? Or some other reasons caused this problem.
   Any suggestions will be appreicated

--feiyu
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