Hi Siegmar,
Heterogeneous environment is not supported officially.
README of Open MPI master says:
--enable-heterogeneous
Enable support for running on heterogeneous clusters (e.g., machines
with different endian representations). Heterogeneous support is
disabled by default because it im
HI Gary,
The decision occurs within the MPI processes themselves (during the call to
MPI_Init) - so
after the orte daemons have started on the nodes.
The BTL's report their "latency" and "bandwidth" - up the stack to the
PML/BML layer which
then decides based on these metrics which BTL to use to
I'm not having any trouble getting it to start, and it's definitely
using the openib btl. I was just wondering how it decided whether the
openib btl was appropriate before going down the btl list to tcp when
all mpirun gets is a hostname and no other information about
connectivity on the remo
Hello Gary,
It depends on how the Open MPI was built, and on mca parameters passed to
the job either via settings in an mca params conf
file or the mpirun command line or env. variables. If you have mxm (MLNX)
or psm (qlogic/intel) installed on the system
where your open mpi was built, you may ac
How does OpenMPI decide whether to use the IB BTL between a given pair
of hosts, assuming there is an IB interface available?
--
Gary
dear all,
I get it.
CALL
MPI_ALLGATHERV(sendbuf(MPI%MCstart:MPI%MCend),MPI%nmc,MPI_INTEGER,MCrank,MCncGlobal,MCdisplay,MPI_INTEGER,COMM_CART,MPI%iErr)
I have to use :
displs
[in] integer array (of length group size). Entry i specifies the
displacement (relative to recvbuf ) at which to place the
Dear,
I my program, I have created a vector and each processor assigns a value to
a part of it:
*do i=MPI%start,MPI%end*
*sendbuf(i)=MPI%rank*
* enddo*
*MPI%start *and* MPI%end* define the starting and ending positions in the
vector.
Now, I would like that each processor knows all the v
Dear Brock Palen,
you are right. I rushed too much. However, I studied MPI, not very much, I
Know it a little bit
Thanks a lot, also for the link to the courses.
Diego
On 22 December 2014 at 06:04, Brock Palen wrote:
> Diego,
>
> That is what you want.
>
> This isn't really the list for thes
