57   SNESFASSetLevels - Sets the number of levels to use with `SNESFAS`.
62 . levels - the number of levels
69   If the number of levels is one then the solver uses the `-fas_levels` prefix
74 PetscErrorCode SNESFASSetLevels(SNES snes, PetscInt levels, MPI_Comm *comms)  in SNESFASSetLevels()  argument
87   if (levels == fas->levels) {  in SNESFASSetLevels()
90   /* user has changed the number of levels; reset */  in SNESFASSetLevels()
92   /* destroy any coarser levels if necessary */  in SNESFASSetLevels()
99   PetscCall(PetscObjectComposedDataSetInt((PetscObject)snes, PetscMGLevelId, levels - 1));  in SNESFASSetLevels()
100   for (i = levels - 1; i >= 0; i--) {  in SNESFASSetLevels()
103     fas->levels = levels;  in SNESFASSetLevels()
114 …    PetscCall(PetscObjectIncrementTabLevel((PetscObject)fas->next, (PetscObject)snes, levels - i));  in SNESFASSetLevels()
127   SNESFASGetLevels - Gets the number of levels in a `SNESFAS`, including fine and coarse grids
133 . levels - the number of levels
139 PetscErrorCode SNESFASGetLevels(SNES snes, PetscInt *levels)  in SNESFASGetLevels()  argument
145   PetscAssertPointer(levels, 2);  in SNESFASGetLevels()
147   *levels = fas->levels;  in SNESFASGetLevels()
174 …levels - 1, PetscObjectComm((PetscObject)snes), PETSC_ERR_ARG_OUTOFRANGE, "Requested level %" Pets…  in SNESFASGetCycleSNES()
175 …PetscCheck(fas->level == fas->levels - 1, PetscObjectComm((PetscObject)snes), PETSC_ERR_ARG_OUTOFR…  in SNESFASGetCycleSNES()
188   use on all levels.
219   use on all levels.
339   PetscInt  i, levels;  in SNESFASSetMonitor()  local
346   levels = fas->levels;  in SNESFASSetMonitor()
348     for (i = 0; i < levels; i++) {  in SNESFASSetMonitor()
356       } else if (i != fas->levels - 1) {  in SNESFASSetMonitor()
357         /* unset the monitors on the coarse levels */  in SNESFASSetMonitor()
366   SNESFASSetLog - Sets or unsets time logging for various `SNESFAS` stages on all levels
382   PetscInt  i, levels;  in SNESFASSetLog()  local
390   levels = fas->levels;  in SNESFASSetLog()
392     for (i = 0; i < levels; i++) {  in SNESFASSetLog()
457   SNESFASCycleSetCycles - Sets the number of cycles for all levels in a `SNESFAS`
727   if (fas->level == fas->levels - 1) *flg = PETSC_TRUE;  in SNESFASCycleIsFine()