[Trilinos-Users] crash using Amesos_superludist

[Robert Crockett]

Hello,

I am using superLU_dist through Amesos, and am seeing a crash in 
parallel. The same problem run using superLU in serial completes without 
issue.

The error is at the NumericalFactorization step - it exits with an error 
code of -1, indicating an issue with the operator. Attached is a stack 
trace from a single processor run, still using superLU_dist.

I have also attached the matrix, in Matrix Market format, as output 
before the NumericalFactorization step. I have verified that it is the 
same whether I run in parallel or serial.

Now for my request: Does anyone have suggestions for how to narrow down 
the cause of the problem? It appears to me to come from SuperLU, but of 
course Amesos is the intermediary here so I would like know what 
facilities in Trilinos might help in trying to rule that out.

One specific question I have is whether superLU_dist requires the global 
row numbers to be contiguous. I ask because I do not see this crash in 
problems where that is the case. If so, then is there a way to get 
around that requirement? (I would like to avoid making them contiguous, 
if possible, in order to avoid the necessary communication, storage, and 
code complexity. But perhaps Trilinos provides means for doing this 
painlessly?)

Many thanks,
Robert

-- 
"The mind is not a vessel to be filled but a fire to be kindled."
-Plutarch
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Robert Crockett, Ph.D.            Research Scientist, Tech-X Corporation
rkcrockett at txcorp.com             5621 Arapahoe Avenue, Suite A
303/996-2037                      Boulder, CO 80303
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