[Trilinos-Users] Trilinos-Users Digest, Vol 75, Issue 8

[Heroux, Mike]

Andrea,

It appears that you are running into the 32 data size limits that are
presently part of Epetra and AztecOO.  You have two options: Use Tpetra
and Belos, which support 64 bit address ranges or wait until the next
version of Trilinos where we plan to remove this limitation from Epetra
and hopefully from AztecOO as well.

Mike

On 11/9/11 2:58 PM, "andrea3.villa at mail.polimi.it"
<andrea3.villa at mail.polimi.it> wrote:

>AztecOO returns the code error: Error: Not enough space for domain
>decomposition
>That problem may be related to the sizing of the stack memory?
>
>
>Def. Quota trilinos-users-request at software.sandia.gov:
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>>    1. AztecOO segmentation fault (andrea3.villa at mail.polimi.it)
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>> ----------------------------------------------------------------------
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>> Message: 1
>> Date: Mon, 07 Nov 2011 21:47:04 +0100
>> From: andrea3.villa at mail.polimi.it
>> Subject: [Trilinos-Users] AztecOO segmentation fault
>> To: trilinos-users at software.sandia.gov
>> Message-ID: <20111107214704.10676gxo0qnikhkw at webmail.polimi.it>
>> Content-Type: text/plain; charset=iso-8859-1; DelSp=Yes; format=flowed
>>
>> Good evening. I have experienced some "segmentation fault" errors
>> during the building phase of the preconditioner in AztecOO. This
>> problem is clearly related to the dymensions of the problem since I
>> experienced no problem under some millions of degrees of freedoms.
>> This problem seems to be machine-independent (it presents in the same
>> way using 4gb or 128 gb of ram).
>> My question is: Is there any way to enlarge the maximum allocation
>> dymension of contiguous memory? Is there any way to let AztecOO work
>> above some millions of dofs without using parallel maps?
>>
>> Thank You for your kind attention.
>> Andrea
>>
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