void AZ_ifpack_solve(double x[], double b[], int options[], double params[], int indx[], int bindx[], int rpntr[], int cpntr[], int bpntr[], double val[], int data_org[], double status[], int proc_config[]) { AZ_MATRIX *Amat; Amat = AZ_matrix_create(data_org[AZ_N_internal]+data_org[AZ_N_border]); options[AZ_output] = 1; if (data_org[AZ_matrix_type] == AZ_MSR_MATRIX) AZ_set_MSR(Amat, bindx, val, data_org, 0, NULL, AZ_LOCAL); else if (data_org[AZ_matrix_type] == AZ_VBR_MATRIX) AZ_set_VBR(Amat, rpntr, cpntr, bpntr, indx, bindx, val, data_org, 0, NULL, AZ_LOCAL); else { fprintf(stderr,"Unknown matrix type (%d)\n",data_org[AZ_matrix_type]); fprintf(stderr,"Matrix-free is now available via AZ_iterate()\n"); exit(1); } AZ_ifpack_iterate(x, b, options, params, status, proc_config, Amat); AZ_matrix_destroy(&Amat); }
void init_guess_and_rhs(int update_index[], int update[], double *x[],double *ax[],int data_org[], double val[], int indx[], int bindx[], int rpntr[], int cpntr[], int bpntr[], int proc_config[]) /* * Set the initial guess and the right hand side where the right hand side * is obtained by doing a matrix-vector multiplication. * * Author: Ray Tuminaro, Div 1422, SNL * Date : 3/15/95 * * Parameters * * update_index == On input, ordering of update and external * locally on this processor. For example * 'update_index[i]' gives the index location * of the block which has the global index * 'update[i]'. * update == On input, list of pts to be updated on this node * data_org == On input, indicates how data is set on this node. * For example, data_org[] contains information on * how many unknowns are internal, external and * border unknowns as well as which points need * to be communicated. See User's Guide for more * details. * val, indx, == On input, holds matrix nonzeros. See User's Guide * bindx, rpntr, for more details. * cpntr, bpntr * x == On output, 'x' is allocated and set to all zeros. * ax == On output, 'ax' is allocated and is set to the * result of a matrix-vector product. */ { int i,j; int temp,num; double sum = 0.0; AZ_MATRIX *Amat; temp = data_org[AZ_N_int_blk] + data_org[AZ_N_bord_blk]; num = data_org[AZ_N_internal] + data_org[AZ_N_border]; /* allocate vectors */ i = num + data_org[AZ_N_external]; *x = (double *) AZ_allocate((i+1)*sizeof(double)); *ax = (double *) AZ_allocate((i+1)*sizeof(double)); if (*ax == NULL) { (void) fprintf(stderr, "Not enough space in init_guess_and_rhs() for ax\n"); exit(1); } for (j = 0 ; j < i ; j++ ) (*x)[j] = 0.0; for (j = 0 ; j < i ; j++ ) (*ax)[j] = 0.0; /* initialize 'x' to a function which will be used in matrix-vector product */ if (data_org[AZ_matrix_type] == AZ_VBR_MATRIX) { for (i = 0; i < temp; i++) { for (j = rpntr[i]; j < rpntr[i+1]; j++) { (*x)[j] = (double) (update[i]) + (double)(j-rpntr[i]) / (double)(num_PDE_eqns); } } } else { for (i = 0; i < temp; i++) { (*x)[i] = (double) (update[i]) / (double) (num_PDE_eqns); } } /* Reorder 'x' so that it conforms to the transformed matrix */ AZ_reorder_vec(*x,data_org,update_index,rpntr); if (application == 2) { /* take out the constant vector. Used for the */ /* finite element problem because it is singular */ sum = AZ_gsum_double(sum, proc_config); i = AZ_gsum_int(num, proc_config); if (i != 0) sum = sum / ((double) i); for (i = 0; i < num; i++) (*x)[i] -= sum; } Amat = AZ_matrix_create(num); if (data_org[AZ_matrix_type] == AZ_MSR_MATRIX) AZ_set_MSR(Amat, bindx, val, data_org, 0, NULL, AZ_LOCAL); else if (data_org[AZ_matrix_type] == AZ_VBR_MATRIX) AZ_set_VBR(Amat, rpntr,cpntr, bpntr, indx,bindx, val, data_org, 0, NULL,AZ_LOCAL); Amat->matvec(*x, *ax, Amat, proc_config); AZ_matrix_destroy( &Amat ); for (i = 0; i < num; i++) (*x)[i] = 0.0; } /* init_guess_and_rhs */
int main(int argc, char *argv[]) { char global[]="global"; char local[]="local"; int proc_config[AZ_PROC_SIZE];/* Processor information. */ int options[AZ_OPTIONS_SIZE]; /* Array used to select solver options. */ double params[AZ_PARAMS_SIZE]; /* User selected solver paramters. */ int *data_org; /* Array to specify data layout */ double status[AZ_STATUS_SIZE]; /* Information returned from AZ_solve(). */ int *update; /* vector elements updated on this node. */ int *external; /* vector elements needed by this node. */ int *update_index; /* ordering of update[] and external[] */ int *extern_index; /* locally on this processor. */ int *indx; /* MSR format of real and imag parts */ int *bindx; int *bpntr; int *rpntr; int *cpntr; AZ_MATRIX *Amat; AZ_PRECOND *Prec; double *val; double *x, *b, *xexact, *xsolve; int n_nonzeros, n_blk_nonzeros; int N_update; /* # of block unknowns updated on this node */ int N_local; /* Number scalar equations on this node */ int N_global, N_blk_global; /* Total number of equations */ int N_external, N_blk_eqns; double *val_msr; int *bindx_msr; double norm, d ; int matrix_type; int has_global_indices, option; int i, j, m, mp ; int ione = 1; #ifdef TEST_SINGULAR double * xnull; /* will contain difference of given exact solution and computed solution*/ double * Axnull; /* Product of A time xnull */ double norm_Axnull; #endif #ifdef AZTEC_MPI double MPI_Wtime(void) ; #endif double time ; #ifdef AZTEC_MPI MPI_Init(&argc,&argv); #endif /* get number of processors and the name of this processor */ #ifdef AZTEC_MPI AZ_set_proc_config(proc_config,MPI_COMM_WORLD); #else AZ_set_proc_config(proc_config,0); #endif printf("proc %d of %d is alive\n", proc_config[AZ_node],proc_config[AZ_N_procs]) ; #ifdef AZTEC_MPI MPI_Barrier(MPI_COMM_WORLD) ; #endif #ifdef VBRMATRIX if(argc != 3) perror("error: enter name of data and partition file on command line") ; #else if(argc != 2) perror("error: enter name of data file on command line") ; #endif /* Set exact solution to NULL */ xexact = NULL; /* Read matrix file and distribute among processors. Returns with this processor's set of rows */ #ifdef VBRMATRIX read_hb(argv[1], proc_config, &N_global, &n_nonzeros, &val_msr, &bindx_msr, &x, &b, &xexact); create_vbr(argv[2], proc_config, &N_global, &N_blk_global, &n_nonzeros, &n_blk_nonzeros, &N_update, &update, bindx_msr, val_msr, &val, &indx, &rpntr, &cpntr, &bpntr, &bindx); if(proc_config[AZ_node] == 0) { free ((void *) val_msr); free ((void *) bindx_msr); free ((void *) cpntr); } matrix_type = AZ_VBR_MATRIX; #ifdef AZTEC_MPI MPI_Barrier(MPI_COMM_WORLD) ; #endif distrib_vbr_matrix( proc_config, N_global, N_blk_global, &n_nonzeros, &n_blk_nonzeros, &N_update, &update, &val, &indx, &rpntr, &cpntr, &bpntr, &bindx, &x, &b, &xexact); #else read_hb(argv[1], proc_config, &N_global, &n_nonzeros, &val, &bindx, &x, &b, &xexact); #ifdef AZTEC_MPI MPI_Barrier(MPI_COMM_WORLD) ; #endif distrib_msr_matrix(proc_config, N_global, &n_nonzeros, &N_update, &update, &val, &bindx, &x, &b, &xexact); #ifdef DEBUG for (i = 0; i<N_update; i++) if (val[i] == 0.0 ) printf("Zero diagonal at row %d\n",i); #endif matrix_type = AZ_MSR_MATRIX; #endif /* convert matrix to a local distributed matrix */ cpntr = NULL; AZ_transform(proc_config, &external, bindx, val, update, &update_index, &extern_index, &data_org, N_update, indx, bpntr, rpntr, &cpntr, matrix_type); printf("Processor %d: Completed AZ_transform\n",proc_config[AZ_node]) ; has_global_indices = 0; option = AZ_LOCAL; #ifdef VBRMATRIX N_local = rpntr[N_update]; #else N_local = N_update; #endif Amat = AZ_matrix_create(N_local); #ifdef VBRMATRIX AZ_set_VBR(Amat, rpntr, cpntr, bpntr, indx, bindx, val, data_org, N_update, update, option); #else AZ_set_MSR(Amat, bindx, val, data_org, N_update, update, option); #endif printf("proc %d Completed AZ_create_matrix\n",proc_config[AZ_node]) ; #ifdef AZTEC_MPI MPI_Barrier(MPI_COMM_WORLD) ; #endif /* initialize AZTEC options */ AZ_defaults(options, params); options[AZ_solver] = AZ_gmres; options[AZ_precond] = AZ_sym_GS; options[AZ_poly_ord] = 1; options[AZ_graph_fill] = 1; params[AZ_rthresh] = 0.0E-7; params[AZ_athresh] = 0.0E-7; options[AZ_overlap] = 1; /* params[AZ_ilut_fill] = 2.0; params[AZ_drop] = 0.01; options[AZ_overlap] = 0; options[AZ_reorder] = 0; params[AZ_rthresh] = 1.0E-1; params[AZ_athresh] = 1.0E-1; options[AZ_precond] = AZ_dom_decomp ; options[AZ_subdomain_solve] = AZ_bilu_ifp; options[AZ_reorder] = 0; options[AZ_graph_fill] = 0; params[AZ_rthresh] = 1.0E-7; params[AZ_athresh] = 1.0E-7; options[AZ_poly_ord] = 1; options[AZ_precond] = AZ_Jacobi; params[AZ_omega] = 1.0; options[AZ_precond] = AZ_none ; options[AZ_poly_ord] = 1; options[AZ_precond] = AZ_Jacobi ; options[AZ_scaling] = AZ_sym_row_sum ; options[AZ_scaling] = AZ_sym_diag; options[AZ_conv] = AZ_noscaled; options[AZ_scaling] = AZ_Jacobi ; options[AZ_precond] = AZ_dom_decomp ; options[AZ_subdomain_solve] = AZ_icc ; options[AZ_subdomain_solve] = AZ_ilut ; params[AZ_omega] = 1.2; params[AZ_ilut_fill] = 2.0; params[AZ_drop] = 0.01; options[AZ_reorder] = 0; options[AZ_overlap] = 0; options[AZ_type_overlap] = AZ_symmetric; options[AZ_precond] = AZ_dom_decomp ; options[AZ_subdomain_solve] = AZ_bilu ; options[AZ_graph_fill] = 0; options[AZ_overlap] = 0; options[AZ_precond] = AZ_dom_decomp ; options[AZ_subdomain_solve] = AZ_bilu_ifp ; options[AZ_graph_fill] = 0; options[AZ_overlap] = 0; params[AZ_rthresh] = 1.0E-3; params[AZ_athresh] = 1.0E-3; options[AZ_poly_ord] = 1; options[AZ_precond] = AZ_Jacobi ; */ options[AZ_kspace] = 600 ; options[AZ_max_iter] = 600 ; params[AZ_tol] = 1.0e-14; #ifdef BGMRES options[AZ_gmres_blocksize] = 3; options[AZ_gmres_num_rhs] = 1; #endif #ifdef DEBUG if (proc_config[AZ_N_procs]==1) write_vec("rhs.dat", N_local, b); #endif /* xsolve is a little longer vector needed to account for external entries. Make it and copy x (initial guess) into it. */ if (has_global_indices) { N_external = 0; } else { N_external = data_org[AZ_N_external]; } xsolve = (double *) calloc(N_local + N_external, sizeof(double)) ; for (i=0; i<N_local; i++) xsolve[i] = x[i]; /* Reorder rhs and xsolve to match matrix ordering from AZ_transform */ if (!has_global_indices) { AZ_reorder_vec(b, data_org, update_index, rpntr) ; AZ_reorder_vec(xsolve, data_org, update_index, rpntr) ; } #ifdef VBRMATRIX AZ_check_vbr(N_update, data_org[AZ_N_ext_blk], AZ_LOCAL, bindx, bpntr, cpntr, rpntr, proc_config); #else AZ_check_msr(bindx, N_update, N_external, AZ_LOCAL, proc_config); #endif printf("Processor %d of %d N_local = %d N_external = %d NNZ = %d\n", proc_config[AZ_node],proc_config[AZ_N_procs],N_local,N_external, n_nonzeros); /* solve the system of equations using b as the right hand side */ Prec = AZ_precond_create(Amat,AZ_precondition, NULL); AZ_iterate(xsolve, b, options, params, status, proc_config, Amat, Prec, NULL); /*AZ_ifpack_iterate(xsolve, b, options, params, status, proc_config, Amat);*/ if (proc_config[AZ_node]==0) { printf("True residual norm = %22.16g\n",status[AZ_r]); printf("True scaled res = %22.16g\n",status[AZ_scaled_r]); printf("Computed res norm = %22.16g\n",status[AZ_rec_r]); } #ifdef TEST_SINGULAR xnull = (double *) calloc(N_local + N_external, sizeof(double)) ; Axnull = (double *) calloc(N_local + N_external, sizeof(double)) ; for (i=0; i<N_local; i++) xnull[i] = xexact[i]; if (!has_global_indices) AZ_reorder_vec(xnull, data_org, update_index, rpntr); for (i=0; i<N_local; i++) xnull[i] -= xsolve[i]; /* fill with nullerence */ Amat->matvec(xnull, Axnull, Amat, proc_config); norm_Axnull = AZ_gvector_norm(N_local, 2, Axnull, proc_config); if (proc_config[AZ_node]==0) printf("Norm of A(xexact-xsolve) = %12.4g\n",norm_Axnull); free((void *) xnull); free((void *) Axnull); #endif /* Get solution back into original ordering */ if (!has_global_indices) { AZ_invorder_vec(xsolve, data_org, update_index, rpntr, x); free((void *) xsolve); } else { free((void *) x); x = xsolve; } #ifdef DEBUG if (proc_config[AZ_N_procs]==1) write_vec("solution.dat", N_local, x); #endif if (xexact != NULL) { double sum = 0.0; double largest = 0.0; for (i=0; i<N_local; i++) sum += fabs(x[i]-xexact[i]); printf("Processor %d: Difference between exact and computed solution = %12.4g\n", proc_config[AZ_node],sum); for (i=0; i<N_local; i++) largest = AZ_MAX(largest,fabs(xexact[i])); printf("Processor %d: Difference divided by max abs value of exact = %12.4g\n", proc_config[AZ_node],sum/largest); } free((void *) val); free((void *) bindx); #ifdef VBRMATRIX free((void *) rpntr); free((void *) bpntr); free((void *) indx); #endif free((void *) b); free((void *) x); if (xexact!=NULL) free((void *) xexact); AZ_free((void *) update); AZ_free((void *) update_index); AZ_free((void *) external); AZ_free((void *) extern_index); AZ_free((void *) data_org); if (cpntr!=NULL) AZ_free((void *) cpntr); AZ_precond_destroy(&Prec); AZ_matrix_destroy(&Amat); #ifdef AZTEC_MPI MPI_Finalize() ; #endif /* end main */ return 0 ; }
int main(int argc, char *argv[]) { int num_PDE_eqns=5, N_levels=3; /* int nsmooth=1; */ int leng, level, N_grid_pts, coarsest_level; /* See Aztec User's Guide for more information on the */ /* variables that follow. */ int proc_config[AZ_PROC_SIZE], options[AZ_OPTIONS_SIZE]; double params[AZ_PARAMS_SIZE], status[AZ_STATUS_SIZE]; /* data structure for matrix corresponding to the fine grid */ int *data_org = NULL, *update = NULL, *external = NULL; int *update_index = NULL, *extern_index = NULL; int *cpntr = NULL; int *bindx = NULL, N_update, iii; double *val = NULL; double *xxx, *rhs; AZ_MATRIX *Amat; AZ_PRECOND *Pmat = NULL; ML *ml; FILE *fp; int ch,i; struct AZ_SCALING *scaling; double solve_time, setup_time, start_time; ML_Aggregate *ag; int *ivec; #ifdef VBR_VERSION ML_Operator *B, *C, *D; int *vbr_cnptr, *vbr_rnptr, *vbr_indx, *vbr_bindx, *vbr_bnptr, total_blk_rows; int total_blk_cols, blk_space, nz_space; double *vbr_val; struct ML_CSR_MSRdata *csr_data; #endif #ifdef ML_MPI MPI_Init(&argc,&argv); /* get number of processors and the name of this processor */ AZ_set_proc_config(proc_config, MPI_COMM_WORLD); #else AZ_set_proc_config(proc_config, AZ_NOT_MPI); #endif #ifdef binary fp=fopen(".data","rb"); #else fp=fopen(".data","r"); #endif if (fp==NULL) { printf("couldn't open file .data\n"); exit(1); } #ifdef binary fread(&leng, sizeof(int), 1, fp); #else fscanf(fp,"%d",&leng); #endif fclose(fp); N_grid_pts=leng/num_PDE_eqns; /* initialize the list of global indices. NOTE: the list of global */ /* indices must be in ascending order so that subsequent calls to */ /* AZ_find_index() will function properly. */ AZ_read_update(&N_update, &update, proc_config, N_grid_pts, num_PDE_eqns, AZ_linear); AZ_read_msr_matrix(update, &val, &bindx, N_update, proc_config); /* This code is to fix things up so that we are sure we have */ /* all block (including the ghost nodes the same size. */ AZ_block_MSR(&bindx, &val, N_update, num_PDE_eqns, update); AZ_transform(proc_config, &external, bindx, val, update, &update_index, &extern_index, &data_org, N_update, 0, 0, 0, &cpntr, AZ_MSR_MATRIX); Amat = AZ_matrix_create( leng ); #ifndef VBR_VERSION AZ_set_MSR(Amat, bindx, val, data_org, 0, NULL, AZ_LOCAL); Amat->matrix_type = data_org[AZ_matrix_type]; data_org[AZ_N_rows] = data_org[AZ_N_internal] + data_org[AZ_N_border]; #else total_blk_rows = N_update/num_PDE_eqns; total_blk_cols = total_blk_rows; blk_space = total_blk_rows*20; nz_space = blk_space*num_PDE_eqns*num_PDE_eqns; vbr_cnptr = (int *) ML_allocate(sizeof(int )*(total_blk_cols+1)); vbr_rnptr = (int *) ML_allocate(sizeof(int )*(total_blk_cols+1)); vbr_bnptr = (int *) ML_allocate(sizeof(int )*(total_blk_cols+2)); vbr_indx = (int *) ML_allocate(sizeof(int )*(blk_space+1)); vbr_bindx = (int *) ML_allocate(sizeof(int )*(blk_space+1)); vbr_val = (double *) ML_allocate(sizeof(double)*(nz_space+1)); for (i = 0; i <= total_blk_cols; i++) vbr_cnptr[i] = num_PDE_eqns; AZ_msr2vbr(vbr_val, vbr_indx, vbr_rnptr, vbr_cnptr, vbr_bnptr, vbr_bindx, bindx, val, total_blk_rows, total_blk_cols, blk_space, nz_space, -1); data_org[AZ_N_rows] = data_org[AZ_N_internal] + data_org[AZ_N_border]; data_org[AZ_N_int_blk] = data_org[AZ_N_internal]/num_PDE_eqns; data_org[AZ_N_bord_blk] = data_org[AZ_N_bord_blk]/num_PDE_eqns; data_org[AZ_N_ext_blk] = data_org[AZ_N_ext_blk]/num_PDE_eqns; data_org[AZ_matrix_type] = AZ_VBR_MATRIX; AZ_set_VBR(Amat, vbr_rnptr, vbr_cnptr, vbr_bnptr, vbr_indx, vbr_bindx, vbr_val, data_org, 0, NULL, AZ_LOCAL); Amat->matrix_type = data_org[AZ_matrix_type]; #endif start_time = AZ_second(); ML_Create(&ml, N_levels); ML_Set_PrintLevel(3); /* set up discretization matrix and matrix vector function */ AZ_ML_Set_Amat(ml, N_levels-1, N_update, N_update, Amat, proc_config); ML_Aggregate_Create( &ag ); ML_Aggregate_Set_Threshold(ag,0.0); ML_Set_SpectralNormScheme_PowerMethod(ml); /* To run SA: a) set damping factor to 1 and use power method ML_Aggregate_Set_DampingFactor(ag, 4./3.); To run NSA: a) set damping factor to 0 ML_Aggregate_Set_DampingFactor(ag, 0.); To run NSR a) set damping factor to 1 and use power method ML_Aggregate_Set_DampingFactor(ag, 1.); ag->Restriction_smoothagg_transpose = ML_FALSE; ag->keep_agg_information=1; ag->keep_P_tentative=1; b) hack code so it calls the energy minimizing restriction line 2973 of ml_agg_genP.c c) turn on the NSR flag in ml_agg_energy_min.cpp To run Emin a) set min_eneryg = 2 and keep_agg_info = 1; ag->minimizing_energy=2; ag->keep_agg_information=1; ag->cheap_minimizing_energy = 0; ag->block_scaled_SA = 1; */ ag->minimizing_energy=2; ag->keep_agg_information=1; ag->block_scaled_SA = 1; ML_Aggregate_Set_NullSpace(ag, num_PDE_eqns, num_PDE_eqns, NULL, N_update); ML_Aggregate_Set_MaxCoarseSize( ag, 20); /* ML_Aggregate_Set_RandomOrdering( ag ); ML_Aggregate_Set_DampingFactor(ag, .1); ag->drop_tol_for_smoothing = 1.0e-3; ML_Aggregate_Set_Threshold(ag, 1.0e-3); ML_Aggregate_Set_MaxCoarseSize( ag, 300); */ coarsest_level = ML_Gen_MultiLevelHierarchy_UsingAggregation(ml, N_levels-1, ML_DECREASING, ag); coarsest_level = N_levels - coarsest_level; if ( proc_config[AZ_node] == 0 ) printf("Coarse level = %d \n", coarsest_level); /* set up smoothers */ AZ_defaults(options, params); for (level = N_levels-1; level > coarsest_level; level--) { /* This is the Aztec domain decomp/ilu smoother that we */ /* usually use for this problem. */ /* options[AZ_precond] = AZ_dom_decomp; options[AZ_subdomain_solve] = AZ_ilut; params[AZ_ilut_fill] = 1.0; options[AZ_reorder] = 1; ML_Gen_SmootherAztec(ml, level, options, params, proc_config, status, AZ_ONLY_PRECONDITIONER, ML_PRESMOOTHER,NULL); */ /* Sparse approximate inverse smoother that acutally does both */ /* pre and post smoothing. */ /* ML_Gen_Smoother_ParaSails(ml , level, ML_PRESMOOTHER, nsmooth, parasails_sym, parasails_thresh, parasails_nlevels, parasails_filter, parasails_loadbal, parasails_factorized); parasails_thresh /= 4.; */ /* This is the symmetric Gauss-Seidel smoothing. In parallel, */ /* it is not a true Gauss-Seidel in that each processor */ /* does a Gauss-Seidel on its local submatrix independent of the */ /* other processors. */ /* ML_Gen_Smoother_SymGaussSeidel(ml,level,ML_PRESMOOTHER, nsmooth,1.); ML_Gen_Smoother_SymGaussSeidel(ml,level,ML_POSTSMOOTHER,nsmooth,1.); */ /* Block Gauss-Seidel with block size equal to #DOF per node. */ /* Not a true Gauss-Seidel in that each processor does a */ /* Gauss-Seidel on its local submatrix independent of the other */ /* processors. */ /* ML_Gen_Smoother_BlockGaussSeidel(ml,level,ML_PRESMOOTHER, nsmooth,0.67, num_PDE_eqns); ML_Gen_Smoother_BlockGaussSeidel(ml,level,ML_POSTSMOOTHER, nsmooth, 0.67, num_PDE_eqns); */ ML_Gen_Smoother_SymBlockGaussSeidel(ml,level,ML_POSTSMOOTHER, 1, 1.0, num_PDE_eqns); } ML_Gen_CoarseSolverSuperLU( ml, coarsest_level); ML_Gen_Solver(ml, ML_MGW, N_levels-1, coarsest_level); AZ_defaults(options, params); options[AZ_solver] = AZ_gmres; options[AZ_scaling] = AZ_none; options[AZ_precond] = AZ_user_precond; /* options[AZ_conv] = AZ_r0; */ options[AZ_output] = 1; options[AZ_max_iter] = 1500; options[AZ_poly_ord] = 5; options[AZ_kspace] = 130; params[AZ_tol] = 1.0e-8; /* options[AZ_precond] = AZ_dom_decomp; options[AZ_subdomain_solve] = AZ_ilut; params[AZ_ilut_fill] = 2.0; */ AZ_set_ML_preconditioner(&Pmat, Amat, ml, options); setup_time = AZ_second() - start_time; xxx = (double *) malloc( leng*sizeof(double)); rhs=(double *)malloc(leng*sizeof(double)); for (iii = 0; iii < leng; iii++) xxx[iii] = 0.0; /* Set rhs */ fp = fopen("AZ_capture_rhs.mat","r"); if (fp == NULL) { if (proc_config[AZ_node] == 0) printf("taking random vector for rhs\n"); AZ_random_vector(rhs, data_org, proc_config); AZ_reorder_vec(rhs, data_org, update_index, NULL); } else { fclose(fp); ivec =(int *)malloc((leng+1)*sizeof(int)); AZ_input_msr_matrix("AZ_capture_rhs.mat", update, &rhs, &ivec, N_update, proc_config); free(ivec); AZ_reorder_vec(rhs, data_org, update_index, NULL); } /* Set x */ fp = fopen("AZ_capture_init_guess.mat","r"); if (fp != NULL) { fclose(fp); ivec =(int *)malloc((leng+1)*sizeof(int)); AZ_input_msr_matrix("AZ_capture_init_guess.mat",update, &xxx, &ivec, N_update, proc_config); free(ivec); AZ_reorder_vec(xxx, data_org, update_index, NULL); } /* if Dirichlet BC ... put the answer in */ for (i = 0; i < data_org[AZ_N_internal]+data_org[AZ_N_border]; i++) { if ( (val[i] > .99999999) && (val[i] < 1.0000001)) xxx[i] = rhs[i]; } fp = fopen("AZ_no_multilevel.dat","r"); scaling = AZ_scaling_create(); start_time = AZ_second(); if (fp != NULL) { fclose(fp); options[AZ_precond] = AZ_none; options[AZ_scaling] = AZ_sym_diag; options[AZ_ignore_scaling] = AZ_TRUE; options[AZ_keep_info] = 1; AZ_iterate(xxx, rhs, options, params, status, proc_config, Amat, NULL, scaling); /* options[AZ_pre_calc] = AZ_reuse; options[AZ_conv] = AZ_expected_values; if (proc_config[AZ_node] == 0) printf("\n-------- Second solve with improved convergence test -----\n"); AZ_iterate(xxx, rhs, options, params, status, proc_config, Amat, NULL, scaling); if (proc_config[AZ_node] == 0) printf("\n-------- Third solve with improved convergence test -----\n"); AZ_iterate(xxx, rhs, options, params, status, proc_config, Amat, NULL, scaling); */ } else { options[AZ_keep_info] = 1; AZ_iterate(xxx, rhs, options, params, status, proc_config, Amat, Pmat, scaling); options[AZ_pre_calc] = AZ_reuse; options[AZ_conv] = AZ_expected_values; /* if (proc_config[AZ_node] == 0) printf("\n-------- Second solve with improved convergence test -----\n"); AZ_iterate(xxx, rhs, options, params, status, proc_config, Amat, Pmat, scaling); if (proc_config[AZ_node] == 0) printf("\n-------- Third solve with improved convergence test -----\n"); AZ_iterate(xxx, rhs, options, params, status, proc_config, Amat, Pmat, scaling); */ } solve_time = AZ_second() - start_time; if (proc_config[AZ_node] == 0) printf("Solve time = %e, MG Setup time = %e\n", solve_time, setup_time); ML_Aggregate_Destroy(&ag); ML_Destroy(&ml); AZ_free((void *) Amat->data_org); AZ_free((void *) Amat->val); AZ_free((void *) Amat->bindx); AZ_free((void *) update); AZ_free((void *) external); AZ_free((void *) extern_index); AZ_free((void *) update_index); AZ_scaling_destroy(&scaling); if (Amat != NULL) AZ_matrix_destroy(&Amat); if (Pmat != NULL) AZ_precond_destroy(&Pmat); free(xxx); free(rhs); #ifdef ML_MPI MPI_Finalize(); #endif return 0; }
int create_and_transform_simple_matrix(int matrix_type, int N, double diag_term, int* proc_config, AZ_MATRIX*& Amat, int*& external, int*& update_index, int*& external_index) { //We're going to create a very simple tri-diagonal matrix with diag_term //on the diagonal, and -1.0 on the off-diagonals. Amat = AZ_matrix_create(N); int* update = new int[N]; int i; int numprocs = proc_config[AZ_N_procs]; int first_eqn = proc_config[AZ_node]*N; int adjustment = 0; for(i=0; i<N; ++i) { update[i] = first_eqn+i; if (update[i] == 0 || update[i] == numprocs*N-1) ++adjustment; } int* data_org; //global row 0 and global-N-1 (N*numprocs-1) will have 2 nonzeros in the first //and last rows, and there will be 3 nonzeros in all other rows. //If you are brave enough to attempt to modify any of the following code, //bear in mind that the number of nonzeros per row (3) is hard-coded in //a few places. int nnz = 3*N - adjustment; double* val = new double[nnz+2]; int* bindx = new int[nnz+2]; int* indx = NULL; int* rpntr = NULL; int* cpntr = NULL; int* bpntr = NULL; int offs = N+1; for(i=0; i<N; ++i) { val[i] = diag_term; bindx[i] = offs; int num_off_diagonals = 2; if (update[i]==0 || update[i]==numprocs*N-1) num_off_diagonals = 1; offs += num_off_diagonals; } bindx[N] = offs; for(i=0; i<N; ++i) { int global_row = update[i]; if (global_row > 0) { int ks = bindx[i]; val[ks] = -1.0; bindx[ks] = global_row-1; } if (global_row < numprocs*N-1) { int ke = bindx[i+1]-1; val[ke] = -1.0; bindx[ke] = global_row+1; } } if (matrix_type == AZ_VBR_MATRIX) { //AZ_transform allocates cpntr rpntr = new int[N+1]; bpntr = new int[N+1]; indx = new int[nnz+2]; offs = 0; for(i=0; i<N; ++i) { rpntr[i] = i; bpntr[i] = offs; if (update[i]==0 || update[i]==numprocs*N-1) offs += 2; else offs += 3; } rpntr[N] = N; bpntr[N] = offs; for(i=0; i<N; ++i) { int global_col = update[i] - 1; if (update[i]==0) ++global_col; for(int j=bpntr[i]; j<=bpntr[i+1]-1; ++j) { if (global_col == update[i]) val[j] = diag_term; else val[j] = -1.0; bindx[j] = global_col++; } } for(i=0; i<nnz+2; ++i) { indx[i] = i; } } AZ_transform(proc_config, &external, bindx, val, update, &update_index, &external_index, &data_org, N, indx, bpntr, rpntr, &cpntr, matrix_type); if (matrix_type == AZ_MSR_MATRIX) { AZ_set_MSR(Amat, bindx, val, data_org, N, update, AZ_LOCAL); } else { AZ_set_VBR(Amat, rpntr, cpntr, bpntr, indx, bindx, val, data_org, N, update, AZ_LOCAL); } Amat->must_free_data_org = 1; return(0); }