[mpich-discuss] Issue with MPI_Comm_spawn_multiple

[Seo, Sangmin]

Hi Toni,

I confirmed the problem and am looking into it. I will get back to you after I resolve it.

Regards,
Sangmin


> On Oct 6, 2015, at 7:23 AM, Antonio J. Peña <antonio.pena at bsc.es> wrote:
> 
> 
> Right, but I do need to use the hosts key to get control of where the processes are spawned. Any clue?
> 
> 
> On 10/02/2015 07:32 PM, Thakur, Rajeev wrote:
>> Looks like it is related to the hosts key. Works without that.
>> 
>> Rajeev
>> 
>>> On Oct 2, 2015, at 10:34 AM, Antonio J. Peña <antonio.pena at bsc.es> wrote:
>>> 
>>> Hi folks!
>>> 
>>> I've been facing an issue with MPI_Comm_spawn_multiple when all the
>>> following conditions are met:
>>> 
>>>  1. 'count' is > 1
>>>  2. Any value of 'array_of_maxprocs' is > 1
>>>  3. Setting the "hosts" info key
>>> 
>>> What I'm finding is that the spawned processes hang at MPI_Init. Find
>>> attached a test case. You can reproduce my issue with -np 1.
>>> 
>>> Is there anything I'm doing wrong? I'm using MPICH master at 1e6c4d8. I
>>> haven't found a pending ticket, xfail test, or test case covering this
>>> situation.
>>> 
>>> All the best,
>>>   Toni
>>> 
>>> [P.S.: It still feels weird to be on the other side of discuss at mpich.org]
>>> 
>>> -- 
>>> Antonio J. Peña
>>> Senior Researcher
>>> Barcelona Supercomputing Center
>>> 
>>> 
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> 
> -- 
> Antonio J. Peña
> Senior Researcher
> Barcelona Supercomputing Center
> 
> 
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