Questions tagged [trilinos]

Trilinos is a set of open source, parallel numerical libraries developed by Sandia National Laboratories.

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Preconditioned residual converges, but true residual doesn't

I'm using Albany w/ Trilinos to solve an elasticity problem with thermal expansion mismatch. I'm using block GMRES with MueLu preconditioning. It works for problem size of several million dofs, but ...
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1answer
53 views

Trilinos: Extracting a submatrix of an Epetra CrsMatrix [closed]

Given a distributed Epetra CrsMatrix $A$, along with a a list of rows, a list of columns and a processor ID, I would like to extract a sub-matrix $A_{sub}$, all the entries of which should be stored ...
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0answers
87 views

What are some important pros and contras considering using Trilinos?

I'm currently developing a large simulation that will run on many nodes, and, as far as possible, on GPUs. I'm now considering to build it using libraries from the Trilinos project. I would for sure ...
3
votes
1answer
468 views

PETSc or Trilinos for GPU?

I have to choose between the PETSc and Trilinos libraries for a project that involves the solution of non-linear systems of equations. From their web sites they both mention support for GPUs, ...
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0answers
179 views

Shift-Invert in Anasazi/Belos using Tpetra Sparse Matrices

I am currently trying to port my code over to Trilinos because the problems that I am working on are too big for LAPACK/ARPACK. Specifically I am computing the generalized eigenvalues/eigenvectors: $$...
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2answers
104 views

Reshaping a MultiVector in Trilinos

I'm using Trilinos for a problem and I have an Epetra_MultiVector object with 1 vector of length m*n*nFrames. I need to turn it ...
4
votes
3answers
313 views

Overlapping communication and computation in PETSc and/or Trilinos?

I am just learning about these packages, so forgive me if this is a trivial/silly question. Our group is working re-developing our code from the ground up using modern software practices. Currently ...
24
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5answers
6k views

What are the main differences between PETSc and Trilinos?

As far as I can tell, the two big generic US Department of Energy computational science software frameworks are PETSc and Trilinos. They seem similar at first glance, beyond differences in language (...