xref: /honee/src/smartsim/sgs_dd_training.c (revision df29e1eeecb4505f1bf77a7dc8798babc49347ab)
1 // SPDX-FileCopyrightText: Copyright (c) 2017-2024, HONEE contributors.
2 // SPDX-License-Identifier: Apache-2.0 OR BSD-2-Clause
3 
4 #include "../../qfunctions/sgs_dd_training.h"
5 
6 #include <petscdmplex.h>
7 
8 #include <navierstokes.h>
9 #include <smartsim.h>
10 
11 typedef struct {
12   CeedElemRestriction  elem_restr_grid_aniso;
13   CeedVector           grid_aniso_ceed;
14   CeedQFunctionContext sgs_dd_train_qfctx;
15 } *SGS_DD_TrainingSetupData;
16 
17 static PetscErrorCode SGS_DD_TrainingSetupDataDestroy(SGS_DD_TrainingSetupData sgs_dd_train_setup_data) {
18   Ceed ceed;
19 
20   PetscFunctionBeginUser;
21   PetscCall(CeedElemRestrictionGetCeed(sgs_dd_train_setup_data->elem_restr_grid_aniso, &ceed));
22 
23   PetscCallCeed(ceed, CeedElemRestrictionDestroy(&sgs_dd_train_setup_data->elem_restr_grid_aniso));
24   PetscCallCeed(ceed, CeedVectorDestroy(&sgs_dd_train_setup_data->grid_aniso_ceed));
25   PetscCallCeed(ceed, CeedQFunctionContextDestroy(&sgs_dd_train_setup_data->sgs_dd_train_qfctx));
26   PetscCall(PetscFree(sgs_dd_train_setup_data));
27   PetscFunctionReturn(PETSC_SUCCESS);
28 }
29 
30 // @brief Create DM for storing data-drive SGS model inputs
31 static PetscErrorCode SGS_DD_TrainingCreateDM(DM dm_source, DM *dm_dd_training, PetscInt degree, PetscInt q_extra, PetscInt *num_components) {
32   PetscSection section;
33 
34   PetscFunctionBeginUser;
35   *num_components = 12;
36 
37   PetscCall(DMClone(dm_source, dm_dd_training));
38   PetscCall(DMSetMatrixPreallocateSkip(*dm_dd_training, PETSC_TRUE));
39   PetscCall(PetscObjectSetName((PetscObject)*dm_dd_training, "Data-Driven SGS Training Data"));
40 
41   PetscCall(DMSetupByOrder_FEM(PETSC_TRUE, PETSC_TRUE, degree, 1, q_extra, 1, num_components, *dm_dd_training));
42 
43   PetscCall(DMGetLocalSection(*dm_dd_training, &section));
44   PetscCall(PetscSectionSetFieldName(section, 0, "Data-Driven SGS Training Data"));
45   PetscCall(PetscSectionSetComponentName(section, 0, 0, "SGSInput1"));
46   PetscCall(PetscSectionSetComponentName(section, 0, 1, "SGSInput2"));
47   PetscCall(PetscSectionSetComponentName(section, 0, 2, "SGSInput3"));
48   PetscCall(PetscSectionSetComponentName(section, 0, 3, "SGSInput4"));
49   PetscCall(PetscSectionSetComponentName(section, 0, 4, "SGSInput5"));
50   PetscCall(PetscSectionSetComponentName(section, 0, 5, "SGSInput6"));
51   PetscCall(PetscSectionSetComponentName(section, 0, 6, "FilteredSGSXX"));
52   PetscCall(PetscSectionSetComponentName(section, 0, 7, "FilteredSGSYY"));
53   PetscCall(PetscSectionSetComponentName(section, 0, 8, "FilteredSGSZZ"));
54   PetscCall(PetscSectionSetComponentName(section, 0, 9, "FilteredSGSYZ"));
55   PetscCall(PetscSectionSetComponentName(section, 0, 10, "FilteredSGSXZ"));
56   PetscCall(PetscSectionSetComponentName(section, 0, 11, "FilteredSGSXY"));
57   PetscFunctionReturn(PETSC_SUCCESS);
58 };
59 
60 // @brief Create CeedOperator to calculate training data for data-drive SGS model at nodes
61 static PetscErrorCode SetupTrainingDataCalculation(Ceed ceed, Honee honee, CeedData ceed_data, ProblemData problem,
62                                                    SGS_DD_TrainingSetupData sgs_dd_train_setup_data) {
63   SGS_DD_TrainingData sgs_dd_train = honee->sgs_dd_train;
64   CeedQFunction       qf_sgs_dd_train;
65   CeedOperator        op_sgs_dd_train;
66   CeedInt             num_comp_grad_velo, num_comp_grid_aniso;
67   CeedVector          inv_multiplicity, filtered_fields;
68   CeedElemRestriction elem_restr_inv_multiplicity, elem_restr_grad_velo, elem_restr_sgs_train;
69   DMLabel             domain_label = NULL;
70   PetscInt            label_value = 0, height = 0, dm_field = 0;
71 
72   PetscFunctionBeginUser;
73   PetscCallCeed(ceed, CeedElemRestrictionGetNumComponents(sgs_dd_train_setup_data->elem_restr_grid_aniso, &num_comp_grid_aniso));
74 
75   PetscCall(DMPlexCeedElemRestrictionCreate(ceed, sgs_dd_train->dm_dd_training, domain_label, label_value, height, dm_field, &elem_restr_sgs_train));
76   PetscCall(GetInverseMultiplicity(ceed, sgs_dd_train->dm_dd_training, domain_label, label_value, height, dm_field, PETSC_TRUE,
77                                    &elem_restr_inv_multiplicity, &inv_multiplicity));
78 
79   CeedElemRestriction elem_restr_filtered_state;
80   CeedInt             num_comp_filtered_state;
81   {  // -- Setup filtered velocity gradient projection
82     CeedBasis         basis_filtered_state;
83     CeedOperatorField op_field;
84     PetscCallCeed(ceed, CeedOperatorGetFieldByName(honee->diff_filter->op_rhs_ctx->op, "v0", &op_field));
85     PetscCallCeed(ceed, CeedOperatorFieldGetElemRestriction(op_field, &elem_restr_filtered_state));
86     PetscCallCeed(ceed, CeedElemRestrictionGetNumComponents(elem_restr_filtered_state, &num_comp_filtered_state));
87     PetscCallCeed(ceed, CeedOperatorFieldGetBasis(op_field, &basis_filtered_state));
88     PetscCall(VelocityGradientProjectionSetup(ceed, honee, ceed_data, problem, STATEVAR_PRIMITIVE, elem_restr_filtered_state, basis_filtered_state,
89                                               &sgs_dd_train->filtered_grad_velo_proj));
90     // Get velocity gradient information
91     PetscCallCeed(ceed, CeedOperatorGetFieldByName(sgs_dd_train->filtered_grad_velo_proj->l2_rhs_ctx->op, "velocity gradient", &op_field));
92     PetscCallCeed(ceed, CeedOperatorFieldGetElemRestriction(op_field, &elem_restr_grad_velo));
93     PetscCallCeed(ceed, CeedElemRestrictionGetNumComponents(elem_restr_grad_velo, &num_comp_grad_velo));
94   }
95 
96   CeedElemRestriction elem_restr_filtered_velo_prod;
97   CeedInt             num_comp_filtered_velo_prod;
98   {  // Get filtered velocity product information
99     CeedOperatorField op_field;
100     PetscCallCeed(ceed, CeedOperatorGetFieldByName(honee->diff_filter->op_rhs_ctx->op, "v1", &op_field));
101     PetscCallCeed(ceed, CeedOperatorFieldGetElemRestriction(op_field, &elem_restr_filtered_velo_prod));
102     PetscCallCeed(ceed, CeedElemRestrictionGetNumComponents(elem_restr_filtered_velo_prod, &num_comp_filtered_velo_prod));
103   }
104 
105   // -- Create operator for generating training data at nodes
106   // Differential Filter only provides filtered primitive variables
107   PetscCallCeed(ceed, CeedQFunctionCreateInterior(ceed, 1, ComputeSGS_DDAnisotropicTrainingDataNodal_Prim,
108                                                   ComputeSGS_DDAnisotropicTrainingDataNodal_Prim_loc, &qf_sgs_dd_train));
109 
110   PetscCallCeed(ceed, CeedQFunctionSetContext(qf_sgs_dd_train, sgs_dd_train_setup_data->sgs_dd_train_qfctx));
111   PetscCallCeed(ceed, CeedQFunctionAddInput(qf_sgs_dd_train, "q", num_comp_filtered_state, CEED_EVAL_NONE));
112   PetscCallCeed(ceed, CeedQFunctionAddInput(qf_sgs_dd_train, "velocity product", num_comp_filtered_velo_prod, CEED_EVAL_NONE));
113   PetscCallCeed(ceed, CeedQFunctionAddInput(qf_sgs_dd_train, "gradient velocity", num_comp_grad_velo, CEED_EVAL_NONE));
114   PetscCallCeed(ceed, CeedQFunctionAddInput(qf_sgs_dd_train, "anisotropy tensor", num_comp_grid_aniso, CEED_EVAL_NONE));
115   PetscCallCeed(ceed, CeedQFunctionAddInput(qf_sgs_dd_train, "inverse multiplicity", 1, CEED_EVAL_NONE));
116   PetscCallCeed(ceed, CeedQFunctionAddOutput(qf_sgs_dd_train, "training data", sgs_dd_train->num_comp_dd_inputs, CEED_EVAL_NONE));
117 
118   PetscCallCeed(ceed, CeedElemRestrictionCreateVector(elem_restr_filtered_state, &filtered_fields, NULL));
119   PetscCallCeed(ceed, CeedOperatorCreate(ceed, qf_sgs_dd_train, NULL, NULL, &op_sgs_dd_train));
120   PetscCallCeed(ceed, CeedOperatorSetField(op_sgs_dd_train, "q", elem_restr_filtered_state, CEED_BASIS_NONE, filtered_fields));
121   PetscCallCeed(ceed, CeedOperatorSetField(op_sgs_dd_train, "velocity product", elem_restr_filtered_velo_prod, CEED_BASIS_NONE, filtered_fields));
122   PetscCallCeed(ceed, CeedOperatorSetField(op_sgs_dd_train, "gradient velocity", elem_restr_grad_velo, CEED_BASIS_NONE, CEED_VECTOR_ACTIVE));
123   PetscCallCeed(ceed, CeedOperatorSetField(op_sgs_dd_train, "anisotropy tensor", sgs_dd_train_setup_data->elem_restr_grid_aniso, CEED_BASIS_NONE,
124                                            sgs_dd_train_setup_data->grid_aniso_ceed));
125   PetscCallCeed(ceed, CeedOperatorSetField(op_sgs_dd_train, "inverse multiplicity", elem_restr_inv_multiplicity, CEED_BASIS_NONE, inv_multiplicity));
126   PetscCallCeed(ceed, CeedOperatorSetField(op_sgs_dd_train, "training data", elem_restr_sgs_train, CEED_BASIS_NONE, CEED_VECTOR_ACTIVE));
127 
128   PetscCall(OperatorApplyContextCreate(sgs_dd_train->filtered_grad_velo_proj->dm, sgs_dd_train->dm_dd_training, ceed, op_sgs_dd_train, NULL, NULL,
129                                        NULL, NULL, &sgs_dd_train->op_training_data_calc_ctx));
130 
131   PetscCallCeed(ceed, CeedVectorDestroy(&inv_multiplicity));
132   PetscCallCeed(ceed, CeedVectorDestroy(&filtered_fields));
133   PetscCallCeed(ceed, CeedElemRestrictionDestroy(&elem_restr_inv_multiplicity));
134   PetscCallCeed(ceed, CeedQFunctionDestroy(&qf_sgs_dd_train));
135   PetscCallCeed(ceed, CeedOperatorDestroy(&op_sgs_dd_train));
136   PetscFunctionReturn(PETSC_SUCCESS);
137 }
138 
139 PetscErrorCode SGS_DD_TrainingSetup(Ceed ceed, Honee honee, CeedData ceed_data, ProblemData problem) {
140   SGS_DDTrainingContext    sgsdd_train_qfctx;
141   SGS_DD_TrainingSetupData sgs_dd_train_setup_data;
142 
143   PetscFunctionBeginUser;
144   if (!honee->diff_filter) PetscCall(DifferentialFilterSetup(ceed, honee, ceed_data, problem));
145   if (!honee->smartsim) PetscCall(SmartSimSetup(honee));
146 
147   PetscCall(PetscNew(&sgsdd_train_qfctx));
148   PetscCall(PetscNew(&sgs_dd_train_setup_data));
149   PetscCall(PetscNew(&honee->sgs_dd_train));
150   SGS_DD_TrainingData sgs_dd_train = honee->sgs_dd_train;
151 
152   sgs_dd_train->overwrite_training_data = PETSC_TRUE;
153   sgs_dd_train->write_data_interval     = 1;
154   sgs_dd_train->num_filter_widths       = sizeof(sgs_dd_train->filter_widths) / sizeof(sgs_dd_train->filter_widths[0]);
155   PetscOptionsBegin(honee->comm, NULL, "SGS Data-Driven Training Options", NULL);
156   PetscCall(PetscOptionsInt("-sgs_train_write_data_interval", "Number of timesteps between writing data into database", NULL,
157                             sgs_dd_train->write_data_interval, &sgs_dd_train->write_data_interval, NULL));
158   PetscCall(PetscOptionsBool("-sgs_train_overwrite_data", "Overwrite old training data in the database", NULL, sgs_dd_train->overwrite_training_data,
159                              &sgs_dd_train->overwrite_training_data, NULL));
160   PetscCall(PetscOptionsRealArray("-sgs_train_filter_width_scales", "Scales of each filter width put into training database", NULL,
161                                   sgs_dd_train->filter_widths, &sgs_dd_train->num_filter_widths, NULL));
162   PetscOptionsEnd();
163 
164   // -- Create DM for storing training data
165   PetscCall(SGS_DD_TrainingCreateDM(honee->dm, &sgs_dd_train->dm_dd_training, honee->app_ctx->degree, honee->app_ctx->q_extra,
166                                     &sgs_dd_train->num_comp_dd_inputs));
167 
168   {  // -- Create QFunction Context
169     NewtonianIdealGasContext gas;
170     PetscCallCeed(ceed, CeedQFunctionContextGetDataRead(problem->apply_vol_ifunction.qfctx, CEED_MEM_HOST, &gas));
171     sgsdd_train_qfctx->gas = *gas;
172     PetscCallCeed(ceed, CeedQFunctionContextRestoreDataRead(problem->apply_vol_ifunction.qfctx, &gas));
173     PetscCallCeed(ceed, CeedQFunctionContextCreate(honee->ceed, &sgs_dd_train_setup_data->sgs_dd_train_qfctx));
174     PetscCallCeed(ceed, CeedQFunctionContextSetData(sgs_dd_train_setup_data->sgs_dd_train_qfctx, CEED_MEM_HOST, CEED_USE_POINTER,
175                                                     sizeof(*sgsdd_train_qfctx), sgsdd_train_qfctx));
176     PetscCallCeed(ceed, CeedQFunctionContextSetDataDestroy(sgs_dd_train_setup_data->sgs_dd_train_qfctx, CEED_MEM_HOST, FreeContextPetsc));
177   }
178 
179   {  // -- Send training data array info to SmartRedis database
180     PetscMPIInt  rank, num_ranks;
181     SmartSimData smartsim = honee->smartsim;
182     PetscCallMPI(MPI_Comm_rank(honee->comm, &rank));
183     PetscCallMPI(MPI_Comm_size(honee->comm, &num_ranks));
184 
185     {
186       PetscSection global_section;
187       PetscInt     num_dofs, num_comps, local_min_max[2] = {0.}, global_min_max[2] = {0.};
188 
189       PetscCall(DMGetGlobalSection(sgs_dd_train->dm_dd_training, &global_section));
190       PetscCall(DMGetGlobalVectorInfo(sgs_dd_train->dm_dd_training, &num_dofs, NULL, NULL));
191       PetscCall(PetscSectionGetFieldComponents(global_section, 0, &num_comps));
192       local_min_max[0] = num_dofs;
193       PetscCall(PetscGlobalMinMaxInt(honee->comm, local_min_max, global_min_max));
194 
195       sgs_dd_train->training_data_array_dims[0] = global_min_max[0] / num_comps;
196       sgs_dd_train->training_data_array_dims[1] = num_comps;
197     }
198 
199     if (rank % smartsim->collocated_database_num_ranks == 0) {
200       {  // Communicate info on simulation size
201         const char tensor_name[]  = "sizeInfo";
202         size_t     array_info_dim = 6;
203         PetscInt64 array_info[6] = {0}, num_features = 6;
204 
205         array_info[0] = sgs_dd_train->training_data_array_dims[0];
206         array_info[1] = sgs_dd_train->training_data_array_dims[1];
207         array_info[2] = num_features;
208         array_info[3] = num_ranks;
209         array_info[4] = smartsim->collocated_database_num_ranks;
210         array_info[5] = rank;
211 
212         PetscCall(PetscLogEventBegin(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
213         PetscCallSmartRedis(
214             put_tensor(smartsim->client, tensor_name, strlen(tensor_name), array_info, &array_info_dim, 1, SRTensorTypeInt64, SRMemLayoutContiguous));
215         PetscCall(SmartRedisVerifyPutTensor(smartsim->client, tensor_name, strlen(tensor_name)));
216         PetscCall(PetscLogEventEnd(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
217       }
218 
219       {  // Send array that communicates if tensors are overwritten in database
220         const char tensor_name[]       = "tensor-ow";
221         PetscInt64 tensor_overwrite[2] = {sgs_dd_train->overwrite_training_data};
222         size_t     dim_2[1]            = {2};
223 
224         PetscCall(PetscLogEventBegin(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
225         PetscCallSmartRedis(
226             put_tensor(smartsim->client, tensor_name, strlen(tensor_name), tensor_overwrite, dim_2, 1, SRTensorTypeInt64, SRMemLayoutContiguous));
227         PetscCall(SmartRedisVerifyPutTensor(smartsim->client, tensor_name, strlen(tensor_name)));
228         PetscCall(PetscLogEventEnd(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
229       }
230 
231       {  // Communicate number of filter widths used
232         const char tensor_name[]     = "num_filter_widths";
233         PetscInt64 num_filter_widths = sgs_dd_train->num_filter_widths;
234         size_t     dim_2             = 1;
235 
236         PetscCall(PetscLogEventBegin(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
237         PetscCallSmartRedis(
238             put_tensor(smartsim->client, tensor_name, strlen(tensor_name), &num_filter_widths, &dim_2, 1, SRTensorTypeInt64, SRMemLayoutContiguous));
239         PetscCall(SmartRedisVerifyPutTensor(smartsim->client, tensor_name, strlen(tensor_name)));
240         PetscCall(PetscLogEventEnd(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
241       }
242     }
243   }
244 
245   // -- Compute and store anisotropy tensor
246   PetscCall(GridAnisotropyTensorProjectionSetupApply(ceed, honee, ceed_data, &sgs_dd_train_setup_data->elem_restr_grid_aniso,
247                                                      &sgs_dd_train_setup_data->grid_aniso_ceed));
248 
249   // -- Create Nodal Evaluation Operator
250   PetscCall(SetupTrainingDataCalculation(ceed, honee, ceed_data, problem, sgs_dd_train_setup_data));
251 
252   PetscCall(SGS_DD_TrainingSetupDataDestroy(sgs_dd_train_setup_data));
253   PetscFunctionReturn(PETSC_SUCCESS);
254 }
255 
256 PetscErrorCode TSMonitor_SGS_DD_Training(TS ts, PetscInt step_num, PetscReal solution_time, Vec Q, void *ctx) {
257   Honee               honee        = (Honee)ctx;
258   Ceed                ceed         = honee->ceed;
259   SGS_DD_TrainingData sgs_dd_train = honee->sgs_dd_train;
260   SmartSimData        smartsim     = honee->smartsim;
261   Vec                 TrainingData;
262   PetscMPIInt         rank;
263 
264   PetscFunctionBeginUser;
265 
266   PetscCallMPI(MPI_Comm_rank(honee->comm, &rank));
267 
268   if (step_num % sgs_dd_train->write_data_interval != 0) PetscFunctionReturn(PETSC_SUCCESS);
269   PetscCall(DMGetGlobalVector(sgs_dd_train->dm_dd_training, &TrainingData));
270 
271   for (PetscInt filter_index = 0; filter_index < sgs_dd_train->num_filter_widths; filter_index++) {
272     PetscCall(PetscLogEventBegin(FLUIDS_TrainDataCompute, 0, 0, 0, 0));
273     {  // -- Compute and assemble training data
274       Vec          FilteredVelocityGradient, FilteredFields, FilteredFields_loc;
275       PetscMemType filtered_fields_mem_type;
276       CeedVector   filtered_fields;
277 
278       {  // Set filter width for the current solve
279         double       filter_width_scaling[3];
280         CeedOperator op_mat;
281         Mat          A_mat;
282 
283         for (int j = 0; j < 3; j++) filter_width_scaling[j] = sgs_dd_train->filter_widths[filter_index];
284         PetscCall(KSPGetOperators(honee->diff_filter->ksp, &A_mat, NULL));
285         PetscCall(MatCeedGetCeedOperators(A_mat, &op_mat, NULL));
286         PetscCall(CeedOperatorSetContextDouble(op_mat, honee->diff_filter->filter_width_scaling_label, filter_width_scaling));
287       }
288 
289       PetscCall(DMGetGlobalVector(honee->diff_filter->dm_filter, &FilteredFields));
290       PetscCall(DMGetLocalVector(honee->diff_filter->dm_filter, &FilteredFields_loc));
291 
292       PetscCall(DifferentialFilterApply(honee, solution_time, Q, FilteredFields));
293       PetscCall(DMGlobalToLocal(honee->diff_filter->dm_filter, FilteredFields, INSERT_VALUES, FilteredFields_loc));
294 
295       PetscCall(DMGetGlobalVector(sgs_dd_train->filtered_grad_velo_proj->dm, &FilteredVelocityGradient));
296       PetscCall(VelocityGradientProjectionApply(sgs_dd_train->filtered_grad_velo_proj, FilteredFields_loc, FilteredVelocityGradient));
297 
298       {
299         CeedOperatorField op_field;
300 
301         PetscCallCeed(ceed, CeedOperatorGetFieldByName(sgs_dd_train->op_training_data_calc_ctx->op, "q", &op_field));
302         PetscCallCeed(ceed, CeedOperatorFieldGetVector(op_field, &filtered_fields));
303       }
304 
305       PetscCall(VecPetscToCeed(FilteredFields_loc, &filtered_fields_mem_type, filtered_fields));  // filtered_fields is an implicit input
306       PetscCall(ApplyCeedOperatorGlobalToGlobal(FilteredVelocityGradient, TrainingData, sgs_dd_train->op_training_data_calc_ctx));
307       PetscCall(VecCeedToPetsc(filtered_fields, filtered_fields_mem_type, FilteredFields_loc));
308 
309       PetscCall(DMRestoreGlobalVector(sgs_dd_train->filtered_grad_velo_proj->dm, &FilteredVelocityGradient));
310       PetscCall(DMRestoreGlobalVector(honee->diff_filter->dm_filter, &FilteredFields));
311       PetscCall(DMRestoreLocalVector(honee->diff_filter->dm_filter, &FilteredFields_loc));
312     }
313     PetscCall(PetscLogEventEnd(FLUIDS_TrainDataCompute, 0, 0, 0, 0));
314 
315     {  // -- Send training data to SmartSim
316       char   array_key[PETSC_MAX_PATH_LEN];
317       size_t array_key_len;
318 
319       if (sgs_dd_train->overwrite_training_data) {
320         PetscCall(PetscSNPrintf(array_key, sizeof array_key, "%s.%" PetscInt_FMT, smartsim->rank_id_name, filter_index));
321       } else {
322         PetscCall(PetscSNPrintf(array_key, sizeof array_key, "%s.%" PetscInt_FMT "%" PetscInt_FMT, smartsim->rank_id_name, step_num, filter_index));
323       }
324       PetscCall(PetscStrlen(array_key, &array_key_len));
325 
326       {
327         const PetscScalar *training_data;
328         PetscCall(VecGetArrayRead(TrainingData, &training_data));
329         PetscCall(PetscLogEventBegin(FLUIDS_SmartRedis_Train, 0, 0, 0, 0));
330         PetscCallSmartRedis(put_tensor(smartsim->client, array_key, array_key_len, (void *)training_data, sgs_dd_train->training_data_array_dims, 2,
331                                        SRTensorTypeDouble, SRMemLayoutContiguous));
332         PetscCall(PetscLogEventEnd(FLUIDS_SmartRedis_Train, 0, 0, 0, 0));
333         PetscCall(VecRestoreArrayRead(TrainingData, &training_data));
334       }
335     }
336   }
337 
338   if (rank % smartsim->collocated_database_num_ranks == 0) {
339     const char tensor_name[] = "step";
340     size_t     dim_2[1]      = {2};
341     PetscInt64 step_array[2] = {step_num, step_num};
342 
343     PetscCall(PetscLogEventBegin(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
344     PetscCallSmartRedis(
345         put_tensor(smartsim->client, tensor_name, strlen(tensor_name), step_array, dim_2, 1, SRTensorTypeInt64, SRMemLayoutContiguous));
346     PetscCall(PetscLogEventEnd(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
347   }
348 
349   PetscCall(DMRestoreGlobalVector(honee->sgs_dd_train->dm_dd_training, &TrainingData));
350   PetscFunctionReturn(PETSC_SUCCESS);
351 }
352 
353 PetscErrorCode TSPostStep_SGS_DD_Training(TS ts) {
354   Honee        honee;
355   const char   check_run_key[]   = "check-run";
356   PetscReal    check_run[2]      = {1};
357   const size_t check_run_dims[1] = {2};
358   size_t       check_run_key_size;
359 
360   PetscFunctionBeginUser;
361   PetscCall(PetscStrlen(check_run_key, &check_run_key_size));
362   PetscCall(TSGetApplicationContext(ts, &honee));
363   SmartSimData smartsim = honee->smartsim;
364 
365   PetscCall(PetscLogEventBegin(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
366   PetscCallSmartRedis(
367       unpack_tensor(smartsim->client, check_run_key, check_run_key_size, check_run, check_run_dims, 1, SRTensorTypeDouble, SRMemLayoutContiguous));
368   PetscCall(PetscLogEventEnd(FLUIDS_SmartRedis_Meta, 0, 0, 0, 0));
369   if (check_run[0] == 0) {
370     PetscCall(PetscPrintf(honee->comm, "-- Simulation stopped by 'check-run' tensor in Redis database\n"));
371     PetscCall(TSSetConvergedReason(ts, TS_CONVERGED_USER));
372   }
373 
374   PetscFunctionReturn(PETSC_SUCCESS);
375 }
376 
377 PetscErrorCode SGS_DD_TrainingDataDestroy(SGS_DD_TrainingData sgs_dd_train) {
378   PetscFunctionBeginUser;
379   if (!sgs_dd_train) PetscFunctionReturn(PETSC_SUCCESS);
380 
381   PetscCall(OperatorApplyContextDestroy(sgs_dd_train->op_training_data_calc_ctx));
382   PetscCall(NodalProjectionDataDestroy(sgs_dd_train->filtered_grad_velo_proj));
383   PetscCall(DMDestroy(&sgs_dd_train->dm_dd_training));
384   PetscCall(PetscFree(sgs_dd_train));
385 
386   PetscFunctionReturn(PETSC_SUCCESS);
387 }
388