Re: [petsc-users] Better solver and preconditioner to use multiple GPU

2023-11-09 Thread Randall Mackie
Hi Ramoni, All EM induction methods solved numerically like finite differences are difficult already because of the null-space of the curl-curl equations and then adding air layers on top of your model also introduce another singularity. These have been dealt with in the past by adding in some

Re: [petsc-users] Better solver and preconditioner to use multiple GPU

2023-11-09 Thread Ramoni Z. Sedano Azevedo
We are solving the Direct Problem of Controlled Source Electromagnetics (CSEM) using finite difference discretization. Em qua., 8 de nov. de 2023 às 13:22, Jed Brown escreveu: > What sort of problem are you solving? Algebraic multigrid like gamg or > hypre are good choices for elliptic problems.

[petsc-users] Απ: PETSC breaks when using HYPRE preconditioner

2023-11-09 Thread Pantelis Moschopoulos
Barry, I configured PETSC with --with-debugging=yes. I think this is enough to block any optimizations, right? I tried both Intel and GNU compilers. The error persists. I tried to change the preconditioner and use PILUT instead of BoomerAMG from Hypre. Still, the error appears. I noticed that I

Re: [petsc-users] PETSC breaks when using HYPRE preconditioner

2023-11-09 Thread Barry Smith
Pantelis If you can set an X Windows DISPLAY variable that works you can run with -on_error_attach_debugger and gdb should pop up in an Xterm on MPI rank 16 showing the code where it is crashing (based on Valgrind Address 0x0 is not stack'd, malloc'd or (recently) free'd there will be poin

Re: [petsc-users] Storing Values using a Triplet for using later

2023-11-09 Thread Brandon Denton via petsc-users
Good Morning, Thank you Matt, Jed, and Barry. I will looking into each of these suggestions a report back. -Brandon From: Matthew Knepley Sent: Wednesday, November 8, 2023 4:18 PM To: Brandon Denton Cc: petsc-users@mcs.anl.gov Subject: Re: [petsc-users] Storin

[petsc-users] PETSC breaks when using HYPRE preconditioner

2023-11-09 Thread Pantelis Moschopoulos
Hello everyone, I am trying to use Petsc coupled with Hypre BoomerAMG as preconditioner in our in-house code to simulate the transient motion of complex fluid with finite elements. The problem is that after a random number of iterations, an error arises when the Hypre is called. The error that

Re: [petsc-users] [BULK] Re: DMPlex and Gmsh

2023-11-09 Thread Sharan Roongta
Hello, Thank you for the response. I shall try it out. Regards, Sharan From: Matthew Knepley [mailto:knep...@gmail.com] Sent: Wednesday, 8 November 2023 23:09 To: Blaise Bourdin Cc: Sharan Roongta ; petsc-users@mcs.anl.gov Subject: [BULK] Re: [petsc-users] DMPlex and Gmsh Importance: Low