Dear All, Could anyone tell me the important tuning
parameters in openmpi with IB interconnect? I tried setting eager_rdma,
min_rdma_size, mpi_leave_pinned parameters from the mpirun command line on 38
nodes cluster (38*2 processors) but in vain. I found simple mpirun with no mca
parameters
Hi Neeraj,
>Could anyone tell me the important tuning parameters in openmpi with
>IB interconnect? I tried setting eager_rdma, min_rdma_size,
>mpi_leave_pinned parameters from the mpirun command line on 38 nodes
>cluster (38*2 processors) but in vain. I found simple mpirun with
On Oct 10, 2007, at 11:09 AM, Jim Kusznir wrote:
I've added:
btl = ^openib
to /etc/openmpi-mca-params.conf on the head node, but this doesn't
seem to help. Does this need to be pushed out to all the compute
nodes as well?
Yes.
--
Jeff Squyres
Cisco Systems
Il giorno 11/ott/07, alle ore 07:16, Neeraj Chourasia ha scritto:
Dear All,
Could anyone tell me the important tuning parameters in openmpi
with IB interconnect? I tried setting eager_rdma, min_rdma_size,
mpi_leave_pinned parameters from the mpirun command line on 38
nodes cluster (3
Hi, The code was pretty simple. I was trying to send 8MB data
from one rank to other in a loop(say 1000 iterations). And then i was taking
the average of time taken and was calculating the bandwidth.The above logic i
tried with both mpirun-with-mca-parameters and without any parameters. And t
