I previously posted this basic question about how to get a max short message size of 512kb instead of 64kb: http://www.open-mpi.org/community/lists/users/2006/08/1803.php Appologies for the repost, but I simply can't figure this out. My application (Gromacs) works fine with LAM.
I have tried: mpirun --mca btl_tcp_eager_limit 524288 --mca btl_tcp_max_send_size 524288 --mca btl_tcp_min_rdma_size 524288 --mca btl_tcp_sndbuf 1048576 --mca btl_tcp_rcvbuf 1048576 *****Crashes immediately with a MPI_Alltoall error --mca btl_tcp_eager_limit 524288 --mca btl_tcp_min_send_size 524288 --mca btl_tcp_max_send_size 1048576 --mca btl_tcp_min_rdma_size 1048576 --mca btl_tcp_sndbuf 1048576 --mca btl_tcp_rcvbuf 1048576 --mca btl_base_verbose 1 --mca btl_base_debug *****Same thing mpirun --mca btl_tcp_eager_limit 524288 *****Same thing mpirun --mca btl_tcp_eager_limit 131072 *****Seems to work, but no benifit (I need at least 223560) mpirun --mca btl_tcp_eager_limit 141072 *****Tried this only as a test, Overloaded the main node. Much appreciation and thanks, Chris Neale.
