Thank you for your response. I tried to run the same example
petsc/src/ksp/ksp/tutorials$ ./ex4 -ksp_type cg -mat_type hypre -ksp_view -pc_type hypre but it crashed with the below error [0]PETSC ERROR: --------------------- Error Message -------------------------------------------------------------- [0]PETSC ERROR: Object is in wrong state [0]PETSC ERROR: Must call MatXXXSetPreallocation(), MatSetUp() or the matrix has not yet been factored on argument 1 "mat" before MatGetOwnershipRange() Below are the options used to configure hypre with cuda support. Do you spot any mistakes? --with-blaslapack-dir=/lustre/scafellpike/local/apps/intel/intel_cs/2018.0.128/mkl --with-cuda=1 --with-cuda-arch=70 --download-hypre=yes --download-hypre-configure-arguments=HYPRE_CUDA_SM=70 --download-hypre-commit=origin/hypre_petsc --with-shared-libraries=1 --known-mpi-shared-libraries=1 --with-cc=mpicc --with-cxx=mpicxx -with-fc=mpif90 Best, Karthik. From: Mark Adams <[email protected]> Date: Friday, 19 November 2021 at 16:31 To: "Chockalingam, Karthikeyan (STFC,DL,HC)" <[email protected]> Cc: "[email protected]" <[email protected]> Subject: Re: [petsc-users] hypre on gpus You should run with -options_left to check that your options are being used. It may be -mat_type hypre. I have tested this: petsc/src/ksp/ksp/tutorials$ srun -n2 ./ex4 -ksp_type cg -mat_type hypre -ksp_view -pc_type hypre You can add -log_view and that will print performance data for each method like KSPSolve. If you are configured with a GPU there will be some extra columns that give the percent of flops on the GPU. In the past hypre has not registered flops with us, but I do get flops from hypre now, and -ksp_view showed that it did indeed use hypre. I saw that the flops were 100% GPU in hypre. On Fri, Nov 19, 2021 at 10:47 AM Karthikeyan Chockalingam - STFC UKRI <[email protected]<mailto:[email protected]>> wrote: Hello, I tried to solve a 3D Poisson (ksp/tutorial/ex45) using -pc_type hypre on gpus ./ex45 -da_grid_x 128 -da_grid_y 128 -da_grid_z 128 -dm_mat_type hypre -dm_vec_type cuda -ksp_type cg -pc_type hypre -pc_hypre_type boomeramg -ksp_monitor -log_view I profiled the run using NSYS - attached you find all the relevant files. Looking at the profile I doubt if hypre is running on gpus. The cuda kernels are barely active. I don’t see any cuda kernel relevant to solve. Is my assessment correct? How can I verify if hypre indeed is running on gpus? Best, Karthik. From: Mark Adams <[email protected]<mailto:[email protected]>> Date: Friday, 8 October 2021 at 18:47 To: "Chockalingam, Karthikeyan (STFC,DL,HC)" <[email protected]<mailto:[email protected]>> Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [petsc-users] hypre on gpus I think you would want to use 'cuda' vec_type, but I . You might ask Hypre how one verifies that the GPU is used. Mark On Fri, Oct 8, 2021 at 1:35 PM Karthikeyan Chockalingam - STFC UKRI <[email protected]<mailto:[email protected]>> wrote: Yes, I used it for both cpu and gpu. Is that not okay? For gpu: -dm_mat_type hypre -dm_vec_type mpicuda For cpu: -dm_mat_type hypre -dm_vec_type mpi From: Mark Adams <[email protected]<mailto:[email protected]>> Date: Friday, 8 October 2021 at 18:28 To: "Chockalingam, Karthikeyan (STFC,DL,HC)" <[email protected]<mailto:[email protected]>> Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [petsc-users] hypre on gpus Did you use -dm_mat_type hypre on the GPU case ? On Fri, Oct 8, 2021 at 12:19 PM Karthikeyan Chockalingam - STFC UKRI <[email protected]<mailto:[email protected]>> wrote: I tried a different exercise ran the same problem on two cpu cores and on two gpu: On gpu PCApply 6 1.0 6.0335e+00 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 6.0e+00 15 0 0 0 1 15 0 0 0 1 0 0 0 0.00e+00 5 9.65e+01 0 and on cpu PCApply 6 1.0 5.6348e+00 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 16 0 0 0 0 16 0 0 0 0 0 timings again are close but gpu version did a reduction 6.0e+00 but the cpu version did not 0.0e+00. I am not sure if that is any indication if hypre ran on gpus? Thanks, Karthik. From: Mark Adams <[email protected]<mailto:[email protected]>> Date: Friday, 8 October 2021 at 16:36 To: "Chockalingam, Karthikeyan (STFC,DL,HC)" <[email protected]<mailto:[email protected]>> Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [petsc-users] hypre on gpus On Fri, Oct 8, 2021 at 10:29 AM Karthikeyan Chockalingam - STFC UKRI <[email protected]<mailto:[email protected]>> wrote: The PCApply timing on gpu PCApply 6 1.0 1.0235e+01 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 39 0 0 0 0 39 0 0 0 0 0 0 0 0.00e+00 0 0.00e+00 0 and cpu PCApply 6 1.0 1.0242e+01 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 41 0 0 0 0 41 0 0 0 0 0 You don't have GPUs. probably. Use -dm_mat_type hypre. are close. It is hard for me tell if hypre on gpu is on or not. Best, Karthik. From: "Chockalingam, Karthikeyan (STFC,DL,HC)" <[email protected]<mailto:[email protected]>> Date: Friday, 8 October 2021 at 14:55 To: Mark Adams <[email protected]<mailto:[email protected]>> Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [petsc-users] hypre on gpus 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]<mailto:[email protected]>> Date: Friday, 8 October 2021 at 14:33 To: "Chockalingam, Karthikeyan (STFC,DL,HC)" <[email protected]<mailto:[email protected]>> Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[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.
