94   PetscObjectParameterSetDefault(tao, grtol, PetscDefined(USE_REAL_SINGLE) ? 1e-5 : 1e-8);  in TaoParametersInitialize()
438   PetscReal catol, crtol, gatol, grtol, gttol;  in TaoSetFromOptions()  local
470   grtol = tao->grtol;  in TaoSetFromOptions()
473 …adient divided by the function value is less than", "TaoSetTolerances", tao->grtol, &grtol, NULL));  in TaoSetFromOptions()
475   PetscCall(TaoSetTolerances(tao, gatol, grtol, gttol));  in TaoSetFromOptions()
651     PetscCall(PetscViewerASCIIPrintf(viewer, " grtol=%g,", (double)tao->grtol));  in TaoView()
854 PetscErrorCode TaoSetTolerances(Tao tao, PetscReal gatol, PetscReal grtol, PetscReal gttol)  in TaoSetTolerances()  argument
859   PetscValidLogicalCollectiveReal(tao, grtol, 3);  in TaoSetTolerances()
869   if (grtol == (PetscReal)PETSC_DETERMINE) {  in TaoSetTolerances()
870     tao->grtol = tao->default_grtol;  in TaoSetTolerances()
871   } else if (grtol != (PetscReal)PETSC_CURRENT) {  in TaoSetTolerances()
872 …PetscCheck(grtol >= 0, PetscObjectComm((PetscObject)tao), PETSC_ERR_ARG_OUTOFRANGE, "Negative grto…  in TaoSetTolerances()
873     tao->grtol = grtol;  in TaoSetTolerances()
1261 PetscErrorCode TaoGetTolerances(Tao tao, PetscReal *gatol, PetscReal *grtol, PetscReal *gttol)  in TaoGetTolerances()  argument
1266   if (grtol) *grtol = tao->grtol;  in TaoGetTolerances()
2015   PetscReal          gatol = tao->gatol, grtol = tao->grtol, gttol = tao->gttol;  in TaoDefaultConvergenceTest()  local
2033   } else if (f != 0 && PetscAbsReal(gnorm / f) <= grtol && cnorm <= crtol) {  in TaoDefaultConvergenceTest()
2034 …(tao, "Converged due to residual ||g(X)||/|f(X)| =%g < %g\n", (double)(gnorm / f), (double)grtol));  in TaoDefaultConvergenceTest()