On Sun, Mar 13, 2016 at 2:02 PM, Matthew Larkin wrote:
> Hello,
>
> My understanding is Open MPI can utilize shared and/or distributed memory
> architecture (parallel programming model). OpenMP is soley for shared
> memory systems.
>
>
The MPI-3 standard provides both explicitly shared and distri
2016-03-13 23:04 GMT+01:00 Matthew Larkin :
> Thanks Nick,
>
> I do understand they are different parallel paradigms and I understand the
> purpose of each.
>
> If I run mpi processes to exhaust all cores, what is the need or purpose to
> also use openmp to create threads? I believe there will be n
Thanks Nick,
I do understand they are different parallel paradigms and I understand the
purpose of each.
If I run mpi processes to exhaust all cores, what is the need or purpose to
also use openmp to create threads? I believe there will be no resources left
for the forked threads?
Sent from Y
2016-03-13 22:02 GMT+01:00 Matthew Larkin :
> Hello,
>
> My understanding is Open MPI can utilize shared and/or distributed memory
> architecture (parallel programming model). OpenMP is soley for shared memory
> systems.
>
> I believe Open MPI incorporates OpenMP from some of the other archives I
>
Hello,
My understanding is Open MPI can utilize shared and/or distributed memory
architecture (parallel programming model). OpenMP is soley for shared memory
systems.
I believe Open MPI incorporates OpenMP from some of the other archives I
glanced at.
Is this a true statement? If so, is there
By doing a parameter sweep, the best results I've gotten are with:
btl_tcp_eager_limit & btl_tcp_rndv_eager_limit = 2 ** 17
btl_tcp_sndbuf & btl_tcp_rcvbuf = 2 ** 24
btl_tcp_endpoint_cache = 2 ** 12
btl_tcp_tcp_links = 2
Even so, the peak performance is around 7000Mbits/s and a message size
aroun
Eric,
A quick grep in Open MPI source indicates that the only 2 places where
MPI_ERR_UNSUPPORTED_DATAREP is issue are deep inside the imported ROMIO code
(3.14):
./ompi/mca/io/romio314/romio/adio/include/adioi_errmsg.h:70:MPI_ERR_UNSUPPORTED_DATAREP
./ompi/mca/io/romio314/romio/adio/include/mpi
