On 2/8/23 22:11, Lex Lee wrote:
I am using UMFPACK to directly solve my large system equation Ax=b. The
solver process is very slow, as only one core of CPU is involved while
running. I am trying to connect UMFPACK with Trilinos, I mean, solve the
equation in multithread / parallel mode in deal.II. I know some
tutorials in deal.II library talking about parallel computing, however,
it looks like not that relevant to my case.
Can someone give me some hints about playing with UMFPACK and Trilinos
together in deal.II?
You can't. UMFPACK can neither use MPI parallelization, nor does it use
threads to use multiple cores. It is what it is.
But the Trilinos interfaces have a class that uses a parallel direct
solver: TrilinosWrappers::SolverDirect
https://dealii.org/developer/doxygen/deal.II/classTrilinosWrappers_1_1SolverDirect.html
that can help in cases like yours.
Best
W.
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