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Subject: [OMPI users] MPI_Send over 2 GB
From: Vittorio (vitto.giova_at_[hidden])
Date: 2009-02-18 19:05:42


Hi! I'm doing a test to measure the transfer rates and latency of ompi over
infiniband

starting from 1 kB everything was doing fine until i wanted to transfer 2 GB
and i received this error

[tatami:02271] *** An error occurred in MPI_Recv
[tatami:02271] *** on communicator MPI_COMM_WORLD
[tatami:02271] *** MPI_ERR_COUNT: invalid count argument
[tatami:02271] *** MPI_ERRORS_ARE_FATAL (goodbye)
[randori:12166] *** An error occurred in MPI_Send
[randori:12166] *** on communicator MPI_COMM_WORLD
[randori:12166] *** MPI_ERR_COUNT: invalid count argument
[randori:12166] *** MPI_ERRORS_ARE_FATAL (goodbye)

this error appears if i run the program either on the same node or both
is 2 GB the intrinsic limit of MPI_Send/MPI_Recv?

thanks a lot
Vittorio