[Trilinos-Users] Hybrid MPI+Threaded Linear and Nonlinear Solvers

[Paul T. Bauman]

Greetings,

I am writing to inquire about the maturity of packages in Trilinos for use
in the solution of large systems of linear and nonlinear equations in a
hybrid MPI+threaded environment.

In particular, browsing trilinos.org, it appears that the Tpetra/Kokkos
refactoring has achieved some maturity. Could I, for example, use the
Tpetra+Belos tutorial (here:
https://code.google.com/p/trilinos/wiki/Tpetra_Belos_CreateSolver) as a
building block for such a hybrid solver (by setting the default node to
TBB, for example)? What about the threaded filling of the matrix/RHS vector
to give to that solver? What about leveraging NOX for nonlinear systems
using Thyra+Tpetra+Kokkos? (A posting to the list in June mentioned that
NOX wasn't ready for GPUs, but didn't indicate one way or the other about
MPI+threading.)

Although coprocessors would eventually be of interest, the more immediate
interest is trying out hybrid MPI+TBB solvers on CPU nodes.

Thanks for your time.

Best,

Paul
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