1 #ifndef _SNESNGMRES_H 2 #define _SNESNGMRES_H 3 4 #include <private/snesimpl.h> 5 6 /* Data structure for the Nonlinear GMRES method. */ 7 typedef struct { 8 9 /* Solver parameters and counters */ 10 PetscInt msize; /* maximum size of krylov space */ 11 PetscInt restart_it; /* number of iterations the restart conditions persist before restart */ 12 PetscViewer monitor; /* debugging output for NGMRES */ 13 PetscBool useGS; /* use nonlinear GS or not */ 14 15 /* History and subspace data */ 16 Vec *Fdot; /* residual history -- length msize */ 17 Vec *Xdot; /* solution history -- length msize */ 18 PetscReal *fnorms; /* the residual norm history */ 19 20 /* General minimization problem context */ 21 PetscScalar *h; /* the constraint matrix */ 22 PetscScalar *beta; /* rhs for the minimization problem */ 23 PetscScalar *xi; /* the dot-product of the current and previous res. */ 24 25 /* Selection constants */ 26 PetscReal gammaA; /* Criterion A residual tolerance */ 27 PetscReal epsilonB; /* Criterion B difference tolerance */ 28 PetscReal deltaB; /* Criterion B residual tolerance */ 29 PetscReal gammaC; /* Restart residual tolerance */ 30 31 /* LS Minimization solve context */ 32 PetscScalar *q; /* the matrix formed as q_ij = (rdot_i, rdot_j) */ 33 PetscBLASInt m; /* matrix dimension */ 34 PetscBLASInt n; /* matrix dimension */ 35 PetscBLASInt nrhs; /* the number of right hand sides */ 36 PetscBLASInt lda; /* the padded matrix dimension */ 37 PetscBLASInt ldb; /* the padded vector dimension */ 38 PetscReal *s; /* the singular values */ 39 PetscReal rcond; /* the exit condition */ 40 PetscBLASInt rank; /* the effective rank */ 41 PetscScalar *work; /* the work vector */ 42 PetscReal *rwork; /* the real work vector used for complex */ 43 PetscBLASInt lwork; /* the size of the work vector */ 44 PetscBLASInt info; /* the output condition */ 45 46 } SNES_NGMRES; 47 48 #define H(i,j) ngmres->h[i*ngmres->msize + j] 49 #define Q(i,j) ngmres->q[i*ngmres->msize + j] 50 51 #endif 52