We are using KNL (Cori) and hypre is not working when configured with '--with-openmp=1', even when not using threads (as far as I can tell, I never use threads).
Hypre is not converging, for instance with an optimized build: srun -n 1 ./ex56 -pc_type hypre -ksp_monitor -ksp_converged_reason -ksp_type cg -pc_hypre_type boomeramg OMP: Warning #239: KMP_AFFINITY: granularity=fine will be used. 0 KSP Residual norm 7.366251922394e+22 1 KSP Residual norm 3.676434682799e+22 Linear solve did not converge due to DIVERGED_INDEFINITE_PC iterations 2 Interestingly in debug mode it almost looks good but it is dying: 05:09 nid02516 maint *= ~/petsc_install/petsc/src/ksp/ksp/examples/tutorials$ make PETSC_DIR=/global/homes/m/madams/petsc_install/petsc-cori-knl-dbg64-intel-omp PETSC_ARCH="" run srun -n 1 ./ex56 -pc_type hypre -ksp_monitor -ksp_converged_reason -ksp_type cg -pc_hypre_type boomeramg OMP: Warning #239: KMP_AFFINITY: granularity=fine will be used. 0 KSP Residual norm 7.882081712007e+02 1 KSP Residual norm 2.500214073037e+02 2 KSP Residual norm 3.371746347713e+01 3 KSP Residual norm 2.918759396143e+00 4 KSP Residual norm 9.006505495017e-01 Linear solve did not converge due to DIVERGED_INDEFINITE_PC iterations 5 This test runs fine on Xeon nodes. I assume that Hypre has been tested on KNL. GAMG runs fine, of coarse and the initial residual is similar to this debug run. Could PETSc be messing up the matrix conversion to hypre '--with-openmp=1' ? Any ideas? Thanks, Mark