Thanks Mark, I will try your recommendations. Should I also change -dm_vec_type to hypre currently I have it as mpicuda?
Karthik. From: Mark Adams <[email protected]> Date: Friday, 8 October 2021 at 14:33 To: "Chockalingam, Karthikeyan (STFC,DL,HC)" <[email protected]> Cc: "[email protected]" <[email protected]> Subject: Re: [petsc-users] hypre on gpus Hypre does not record its flops with PETSc's timers. Configure with and without CUDA and see if the timings change in PCApply. Hypre does not dynamically switch between CUDA and CPU solves at this time, but you want to use -dm_mat_type hypre. Mark On Fri, Oct 8, 2021 at 6:59 AM Karthikeyan Chockalingam - STFC UKRI <[email protected]<mailto:[email protected]>> wrote: Hello, I am trying to run ex45 (in KSP tutorial) using hypre on gpus. I have attached the python configuration file and -log_view output from running the below command options mpirun -n 2 ./ex45 -log_view -da_grid_x 169 -da_grid_y 169 -da_grid_z 169 -dm_mat_type mpiaijcusparse -dm_vec_type mpicuda -ksp_type gmres -pc_type hypre -pc_hypre_type boomeramg -ksp_gmres_restart 31 -pc_hypre_boomeramg_strong_threshold 0.7 -ksp_monitor The problem was solved and converged but from the output file I suspect hypre is not running on gpus as PCApply and DMCreate does not record any gpu Mflop/s. However, some events such KSPSolve, MatMult etc are running on gpus. Can you please let me know if I need to add any extra flag to the attached arch-ci-linux-cuda11-double-xx.py script file to get hypre working on gpus? Thanks, Karthik. This email and any attachments are intended solely for the use of the named recipients. If you are not the intended recipient you must not use, disclose, copy or distribute this email or any of its attachments and should notify the sender immediately and delete this email from your system. UK Research and Innovation (UKRI) has taken every reasonable precaution to minimise risk of this email or any attachments containing viruses or malware but the recipient should carry out its own virus and malware checks before opening the attachments. UKRI does not accept any liability for any losses or damages which the recipient may sustain due to presence of any viruses.
