We should probably create an MPI extension that exposes the internal database
so you can just get the info as it is already present, and it seems a shame to
execute a collective operation just to re-create it. I’ll put it on my “to-do”
list.
> On Nov 25, 2014, at 4:14 PM, Teranishi, Keita wro
Adam,
Thanks for the suggestion. I was using my own tokenizer (or those from boost)
to extract node ID numbers, but your approach is more generic and serves my own
purpose. For the time being I will try to leverage the SCR source, and will
ask you if I need any further assistance.
Best Regar
Hi Keita,
There is no MPI API to do this from within an MPI application. One method I
have used for this purpose is to create a function that executes an
MPI_Comm_split operation using a string as a color value. As output, it
returns a communicator containing all procs that specified the same
Are you doing this just for debugging? Or you really want to do it within the
MPI program?
orte-ps
Gives you the pid/host for each rank, but I don't think there is any standard
way to do this via API.
Brock Palen
www.umich.edu/~brockp
CAEN Advanced Computing
XSEDE Campus Champion
bro...@umich
Every process has a complete map of where every process in the job is located -
not sure if there is an MPI API for accessing it, though.
> On Nov 25, 2014, at 2:32 PM, Teranishi, Keita wrote:
>
> Hi,
>
> I am trying to figure out a way for each local MPI rank to identify the
> ranks locate
Hi,
I am trying to figure out a way for each local MPI rank to identify the ranks
located in physically remote nodes (just different nodes) of cluster or MPPs
such as Cray. I am using MPI_Get_processor_name to get the node ID, but it
requires some processing to map MPI rank to the node ID. I
Might be worth trying 1.8.3 to see if it works - there is an updated version of
ROMIO in it.
> On Nov 25, 2014, at 12:13 PM, Eric Chamberland
> wrote:
>
> Hi,
>
> I have random segmentation violations (signal 11) in the mentioned function
> when testing MPI I/O calls with 2 processes on a si
Hi,
I have random segmentation violations (signal 11) in the mentioned
function when testing MPI I/O calls with 2 processes on a single
machine. Most of the time (1499/1500), it works perfectly.
here are the call stacks (for 1.6.3) on processes:
process 0:
==
> On Nov 25, 2014, at 01:12 , Gilles Gouaillardet
> wrote:
>
> Bottom line, though Open MPI implementation of MPI_Dist_graph_create is not
> deterministic, it is compliant with the MPI standard.
> /* not to mention this is not the right place to argue what the standard
> could or should have b
George,
imho, you are right !
here is attached a new version of Ghislain's program and that uses
MPI_Dist_graph_neighbors_count and MPI_Dist_graph_neighbors
as you suggested.
it produces correct results
/* note that in this case, realDestinations is similar to targets,
so i might have left some
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