[petsc-users] Searching for a suitable example case for parallel linear solver

[Jed Brown]

If you have a stored matrix (strongly discouraged as a workflow, but
handy for tests), you can run ksp/ksp/examples/tutorials/ex10.c (no need
to edit code).  If you have a structured grid and want a fast solver,
you should consider using geometric multigrid; see
src/ksp/ksp/examples/tutorials/ex22f.F90 which has that capability.

SONG Pengyang <Peterspy at outlook.com> writes:

> Hi all,
> I am a new user of PETSC, and I am trying to use KSP to solve a 3D Poisson problem. The 3D Poisson problem is differenced by myself, which means that matrix A is given already.
> I have found several examples in KSP tutorials but I want to know which one is suitable for me in “ex2f; ex6f; ex15f; ex21f; ex44f; ex45f”
> Thanks in advance.
> Regards,
> Pengyang
>
> ----------------------------------------------------------------
> Pengyang Song（宋朋洋）
> MSc candidate in Physical Oceanography
> College of Oceanic and Atmospheric Sciences
> Ocean University of China
> No. 238 Songling Road, Qingdao 266100, Shandong, China
> TEL: (+86) 15762264643