Joe O'Connor comments

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                                            Joe O'Connor

AmgX not determinstic on large matrices even with determinism_flag=1

Hi @marsaev, thanks for your reply. The solver config I'm using is: ```json { "config_version": 2, "verbosity_level": 0, "determinism_flag": 1, "communicator": "MPI", "solver": { "solver": "GMRES", "print_solve_stats": 1, "obtain_timings": 0,...

AmgX not determinstic on large matrices even with determinism_flag=1

Hi, yes with `print_grid_stats=1` I get a slightly different output between runs (e.g. some levels have different numbers of rows/entries between runs). Actually, it was more like there were two/three...

AmgX not determinstic on large matrices even with determinism_flag=1

Great, thanks.

AmgX not determinstic on large matrices even with determinism_flag=1

OK great, thanks a lot for taking the time to look at it!

Classical AMG struggling to converge in distributed mode for singular system

Thanks for your reply. Yes the system is ill-posed. That's why I didn't expect AmgX to perform particularly well for this case (and was surprised to find the single GPU...

Classical AMG struggling to converge in distributed mode for singular system

Thanks for your reply. That confirms what my initial thoughts were. Here is my config settings. I have tried playing around with these quite a bit, but unless I increase...