[petsc-users] Error using GPU in Fortran code

[Ramoni Z. Sedano Azevedo]

Hello,

I'm executing a code in Fortran using PETSc with MPI via CPU and I would
like to execute it using GPU.
PETSc is configured as follows:
./configure \
 --prefix=${PWD}/installdir \
 --with-fortran \
 --with-fortran-kernels=true \
 --with-cuda \
 --download-fblaslapack \
 --with-scalar-type=complex \
 --with-precision=double \
 --with-debugging=0 \
 --with-x=0 \
 --with-gnu-compilers=1 \
 --with-cc=mpicc \
 --with-cxx=mpicxx \
 --with-fc=mpif90 \
 --with-make-exec=make

The parameters for using MPI on CPU are:
mpirun -np $ntasks ./${executable} \
 -A_mat_type mpiaij \
 -P_mat_type mpiaij \
 -em_ksp_monitor_true_residual \
 -em_ksp_type bcgs \
 -em_pc_type bjacobi \
 -em_sub_pc_type ilu \
 -em_sub_pc_factor_levels 3 \
 -em_sub_pc_factor_fill 6 \
 < ./Parameters.inp

Code output:
Solving for Hz fields
 bnorm   3.7727507818834821E-005
 xnorm   2.3407405211699372E-016
  Residual norms for em_ solve.
  0 KSP preconditioned resid norm 1.236208833927e-08 true resid norm
1.413045088306e-03 ||r(i)||/||b|| 3.745397377137e+01
  1 KSP preconditioned resid norm 1.664973208594e-10 true resid norm
3.463939828700e+00 ||r(i)||/||b|| 9.181470043910e+04
  2 KSP preconditioned resid norm 8.366983092820e-14 true resid norm
9.171051852915e-02 ||r(i)||/||b|| 2.430866066466e+03
  3 KSP preconditioned resid norm 1.386354386207e-14 true resid norm
1.905770367881e-02 ||r(i)||/||b|| 5.051408052270e+02
  4 KSP preconditioned resid norm 4.635883581096e-15 true resid norm
7.285180695640e-03 ||r(i)||/||b|| 1.930999717931e+02
  5 KSP preconditioned resid norm 1.974093227402e-15 true resid norm
2.953370060898e-03 ||r(i)||/||b|| 7.828161020018e+01
  6 KSP preconditioned resid norm 1.182781787023e-15 true resid norm
2.288756945462e-03 ||r(i)||/||b|| 6.066546871987e+01
  7 KSP preconditioned resid norm 6.221244366707e-16 true resid norm
1.263339414861e-03 ||r(i)||/||b|| 3.348589631014e+01
  8 KSP preconditioned resid norm 3.800488678870e-16 true resid norm
9.015738978063e-04 ||r(i)||/||b|| 2.389699054959e+01
  9 KSP preconditioned resid norm 2.498733213989e-16 true resid norm
7.194509577987e-04 ||r(i)||/||b|| 1.906966559396e+01
 10 KSP preconditioned resid norm 1.563017112250e-16 true resid norm
5.055208317846e-04 ||r(i)||/||b|| 1.339926385310e+01
 11 KSP preconditioned resid norm 8.733803057628e-17 true resid norm
3.171941303660e-04 ||r(i)||/||b|| 8.407502872682e+00
 12 KSP preconditioned resid norm 4.907010803529e-17 true resid norm
1.868311755294e-04 ||r(i)||/||b|| 4.952120782177e+00
 13 KSP preconditioned resid norm 2.214070343700e-17 true resid norm
8.760421740830e-05 ||r(i)||/||b|| 2.322025028236e+00
 14 KSP preconditioned resid norm 1.333171674446e-17 true resid norm
5.984548368534e-05 ||r(i)||/||b|| 1.586255948119e+00
 15 KSP preconditioned resid norm 7.696778066646e-18 true resid norm
3.786809196913e-05 ||r(i)||/||b|| 1.003726303656e+00
 16 KSP preconditioned resid norm 3.863008301366e-18 true resid norm
1.284864871601e-05 ||r(i)||/||b|| 3.405644702988e-01
 17 KSP preconditioned resid norm 2.061402843494e-18 true resid norm
1.054741071688e-05 ||r(i)||/||b|| 2.795681805311e-01
 18 KSP preconditioned resid norm 1.062033155108e-18 true resid norm
3.992776343462e-06 ||r(i)||/||b|| 1.058319664960e-01
 converged reason            2
 total number of relaxations           18
 ========================================

The parameters for GPU usage are:
mpirun -np $ntasks ./${executable} \
 -A_mat_type aijcusparse \
 -P_mat_type aijcusparse \
 -vec_type cuda \
 -use_gpu_aware_mpi 0 \
 -em_ksp_monitor_true_residual \
 -em_ksp_type bcgs \
 -em_pc_type bjacobi \
 -em_sub_pc_type ilu \
 -em_sub_pc_factor_levels 3 \
 -em_sub_pc_factor_fill 6 \
 < ./Parameters.inp

Code output:
Solving for Hz fields
 bnorm   3.7727507818834821E-005
 xnorm   2.3407405211699372E-016
  Residual norms for em_ solve.
  0 KSP preconditioned resid norm 1.236220954395e-08 true resid norm
3.772750781883e-05 ||r(i)||/||b|| 1.000000000000e+00
  1 KSP preconditioned resid norm 0.000000000000e+00 true resid norm
3.772750781883e-05 ||r(i)||/||b|| 1.000000000000e+00
 converged reason            3
 total number of relaxations            1
 ========================================

Clearly the code running on GPU is not converging correctly.
Has anyone experienced this problem?

Sincerely,
Ramoni Z. S. Azevedo
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