[petsc-users] Memory leak in snesnpc ?

[Adolfo Rodriguez]

I am suspecting that there is a memory leak in the implementation of
non-linear preconditioners in PETSc.

When I use the following options I see the memory usage increase (using the
windows process monitor) during consecutive time steps.

  PetscOptionsSetValue(NULL, "-snes_type", "qn");
PetscOptionsSetValue(NULL, "-snes_qn_monitor", "");
PetscOptionsSetValue(NULL, "-snes_qn_scale_type ", "jacobian");
PetscOptionsSetValue(NULL, "-npc_snes_max_it", max_it);
PetscOptionsSetValue(NULL, "-npc_snes_type", "newtonls");
PetscOptionsSetValue(NULL, "-npc_pc_factor_levels", ilu_level);
PetscOptionsSetValue(NULL, "-npc_ksp_rtol", s_ksp_rtol);
PetscOptionsSetValue(NULL, "-npc_snes_linesearch_type", "bt");
PetscOptionsSetValue(NULL, "-npc_snes_linesearch_max_it", "5");

SNESSetFromOptions(snes);

I destroy the context after each time step


However, if I don't use a non-linear preconditioner, ie.,

 PetscOptionsSetValue(NULL, "-snes_converged_reason", "");
PetscOptionsSetValue(NULL, "-snes_type", "qn");
PetscOptionsSetValue(NULL, "-snes_qn_monitor", "");
PetscOptionsSetValue(NULL, "-snes_qn_scale_type ", "jacobian");
  SNESSetFromOptions(snes);

Then everything works fine.

Am I missing something?

Thanks!
Adolfo
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