1 // Copyright (c) 2017-2022, Lawrence Livermore National Security, LLC and other CEED contributors. 2 // All Rights Reserved. See the top-level LICENSE and NOTICE files for details. 3 // 4 // SPDX-License-Identifier: BSD-2-Clause 5 // 6 // This file is part of CEED: http://github.com/ceed 7 8 /// @file 9 /// Time-stepping functions for Navier-Stokes example using PETSc 10 11 #include <ceed.h> 12 #include <petscdmplex.h> 13 #include <petscts.h> 14 15 #include "../navierstokes.h" 16 #include "../qfunctions/newtonian_state.h" 17 18 // @brief Create KSP to solve the inverse mass operator for explicit time stepping schemes 19 PetscErrorCode CreateKSPMassOperator(User user, CeedData ceed_data) { 20 Ceed ceed = user->ceed; 21 DM dm = user->dm; 22 CeedQFunction qf_mass; 23 CeedOperator op_mass; 24 OperatorApplyContext mass_matop_ctx; 25 CeedInt num_comp_q, q_data_size; 26 27 PetscFunctionBeginUser; 28 PetscCallCeed(ceed, CeedElemRestrictionGetNumComponents(ceed_data->elem_restr_q, &num_comp_q)); 29 PetscCallCeed(ceed, CeedElemRestrictionGetNumComponents(ceed_data->elem_restr_qd_i, &q_data_size)); 30 31 PetscCall(CreateMassQFunction(ceed, num_comp_q, q_data_size, &qf_mass)); 32 PetscCallCeed(ceed, CeedOperatorCreate(ceed, qf_mass, NULL, NULL, &op_mass)); 33 PetscCallCeed(ceed, CeedOperatorSetField(op_mass, "u", ceed_data->elem_restr_q, ceed_data->basis_q, CEED_VECTOR_ACTIVE)); 34 PetscCallCeed(ceed, CeedOperatorSetField(op_mass, "qdata", ceed_data->elem_restr_qd_i, CEED_BASIS_NONE, ceed_data->q_data)); 35 PetscCallCeed(ceed, CeedOperatorSetField(op_mass, "v", ceed_data->elem_restr_q, ceed_data->basis_q, CEED_VECTOR_ACTIVE)); 36 37 { // -- Setup KSP for mass operator 38 Mat mat_mass = NULL; 39 Vec Zeros_loc; 40 MPI_Comm comm = PetscObjectComm((PetscObject)dm); 41 42 PetscCall(DMCreateLocalVector(dm, &Zeros_loc)); 43 PetscCall(VecZeroEntries(Zeros_loc)); 44 PetscCall(OperatorApplyContextCreate(dm, dm, ceed, op_mass, NULL, NULL, Zeros_loc, NULL, &mass_matop_ctx)); 45 PetscCall(CreateMatShell_Ceed(mass_matop_ctx, &mat_mass)); 46 47 PetscCall(KSPCreate(comm, &user->mass_ksp)); 48 PetscCall(KSPSetOptionsPrefix(user->mass_ksp, "mass_")); 49 { // lumped by default 50 PC pc; 51 PetscCall(KSPGetPC(user->mass_ksp, &pc)); 52 PetscCall(PCSetType(pc, PCJACOBI)); 53 PetscCall(PCJacobiSetType(pc, PC_JACOBI_ROWSUM)); 54 PetscCall(KSPSetType(user->mass_ksp, KSPPREONLY)); 55 } 56 PetscCall(KSPSetOperators(user->mass_ksp, mat_mass, mat_mass)); 57 PetscCall(KSPSetFromOptions(user->mass_ksp)); 58 PetscCall(VecDestroy(&Zeros_loc)); 59 PetscCall(MatDestroy(&mat_mass)); 60 } 61 62 // Cleanup 63 PetscCallCeed(ceed, CeedQFunctionDestroy(&qf_mass)); 64 PetscCallCeed(ceed, CeedOperatorDestroy(&op_mass)); 65 PetscFunctionReturn(PETSC_SUCCESS); 66 } 67 68 // Insert Boundary values if it's a new time 69 PetscErrorCode UpdateBoundaryValues(User user, Vec Q_loc, PetscReal t) { 70 PetscFunctionBeginUser; 71 if (user->time_bc_set != t) { 72 PetscCall(DMPlexInsertBoundaryValues(user->dm, PETSC_TRUE, Q_loc, t, NULL, NULL, NULL)); 73 user->time_bc_set = t; 74 } 75 PetscFunctionReturn(PETSC_SUCCESS); 76 } 77 78 // RHS (Explicit time-stepper) function setup 79 // This is the RHS of the ODE, given as u_t = G(t,u) 80 // This function takes in a state vector Q and writes into G 81 PetscErrorCode RHS_NS(TS ts, PetscReal t, Vec Q, Vec G, void *user_data) { 82 User user = *(User *)user_data; 83 Ceed ceed = user->ceed; 84 PetscScalar dt; 85 Vec Q_loc = user->Q_loc; 86 87 PetscFunctionBeginUser; 88 // Update time dependent data 89 PetscCall(UpdateBoundaryValues(user, Q_loc, t)); 90 if (user->phys->solution_time_label) PetscCallCeed(ceed, CeedOperatorSetContextDouble(user->op_rhs_ctx->op, user->phys->solution_time_label, &t)); 91 PetscCall(TSGetTimeStep(ts, &dt)); 92 if (user->phys->timestep_size_label) PetscCallCeed(ceed, CeedOperatorSetContextDouble(user->op_rhs_ctx->op, user->phys->timestep_size_label, &dt)); 93 94 PetscCall(ApplyCeedOperatorGlobalToGlobal(Q, G, user->op_rhs_ctx)); 95 96 // Inverse of the lumped mass matrix 97 PetscCall(KSPSolve(user->mass_ksp, G, G)); 98 PetscFunctionReturn(PETSC_SUCCESS); 99 } 100 101 // Surface forces function setup 102 static PetscErrorCode Surface_Forces_NS(DM dm, Vec G_loc, PetscInt num_walls, const PetscInt walls[], PetscScalar *reaction_force) { 103 DMLabel face_label; 104 const PetscScalar *g; 105 PetscInt dof, dim = 3; 106 MPI_Comm comm; 107 PetscSection s; 108 109 PetscFunctionBeginUser; 110 PetscCall(PetscArrayzero(reaction_force, num_walls * dim)); 111 PetscCall(PetscObjectGetComm((PetscObject)dm, &comm)); 112 PetscCall(DMGetLabel(dm, "Face Sets", &face_label)); 113 PetscCall(VecGetArrayRead(G_loc, &g)); 114 for (PetscInt w = 0; w < num_walls; w++) { 115 const PetscInt wall = walls[w]; 116 IS wall_is; 117 PetscCall(DMGetLocalSection(dm, &s)); 118 PetscCall(DMLabelGetStratumIS(face_label, wall, &wall_is)); 119 if (wall_is) { // There exist such points on this process 120 PetscInt num_points; 121 PetscInt num_comp = 0; 122 const PetscInt *points; 123 PetscCall(PetscSectionGetFieldComponents(s, 0, &num_comp)); 124 PetscCall(ISGetSize(wall_is, &num_points)); 125 PetscCall(ISGetIndices(wall_is, &points)); 126 for (PetscInt i = 0; i < num_points; i++) { 127 const PetscInt p = points[i]; 128 const StateConservative *r; 129 PetscCall(DMPlexPointLocalRead(dm, p, g, &r)); 130 PetscCall(PetscSectionGetDof(s, p, &dof)); 131 for (PetscInt node = 0; node < dof / num_comp; node++) { 132 for (PetscInt j = 0; j < 3; j++) { 133 reaction_force[w * dim + j] -= r[node].momentum[j]; 134 } 135 } 136 } 137 PetscCall(ISRestoreIndices(wall_is, &points)); 138 } 139 PetscCall(ISDestroy(&wall_is)); 140 } 141 PetscCallMPI(MPI_Allreduce(MPI_IN_PLACE, reaction_force, dim * num_walls, MPIU_SCALAR, MPI_SUM, comm)); 142 // Restore Vectors 143 PetscCall(VecRestoreArrayRead(G_loc, &g)); 144 PetscFunctionReturn(PETSC_SUCCESS); 145 } 146 147 // Implicit time-stepper function setup 148 PetscErrorCode IFunction_NS(TS ts, PetscReal t, Vec Q, Vec Q_dot, Vec G, void *user_data) { 149 User user = *(User *)user_data; 150 Ceed ceed = user->ceed; 151 PetscScalar dt; 152 Vec Q_loc = user->Q_loc, Q_dot_loc = user->Q_dot_loc, G_loc; 153 PetscMemType q_mem_type, q_dot_mem_type, g_mem_type; 154 155 PetscFunctionBeginUser; 156 // Get local vectors 157 PetscCall(DMGetNamedLocalVector(user->dm, "ResidualLocal", &G_loc)); 158 159 // Update time dependent data 160 PetscCall(UpdateBoundaryValues(user, Q_loc, t)); 161 if (user->phys->solution_time_label) PetscCallCeed(ceed, CeedOperatorSetContextDouble(user->op_ifunction, user->phys->solution_time_label, &t)); 162 PetscCall(TSGetTimeStep(ts, &dt)); 163 if (user->phys->timestep_size_label) PetscCallCeed(ceed, CeedOperatorSetContextDouble(user->op_ifunction, user->phys->timestep_size_label, &dt)); 164 165 // Global-to-local 166 PetscCall(DMGlobalToLocalBegin(user->dm, Q, INSERT_VALUES, Q_loc)); 167 PetscCall(DMGlobalToLocalBegin(user->dm, Q_dot, INSERT_VALUES, Q_dot_loc)); 168 PetscCall(DMGlobalToLocalEnd(user->dm, Q, INSERT_VALUES, Q_loc)); 169 PetscCall(DMGlobalToLocalEnd(user->dm, Q_dot, INSERT_VALUES, Q_dot_loc)); 170 171 // Place PETSc vectors in CEED vectors 172 PetscCall(VecReadP2C(Q_loc, &q_mem_type, user->q_ceed)); 173 PetscCall(VecReadP2C(Q_dot_loc, &q_dot_mem_type, user->q_dot_ceed)); 174 PetscCall(VecP2C(G_loc, &g_mem_type, user->g_ceed)); 175 176 // Apply CEED operator 177 PetscCall(PetscLogEventBegin(FLUIDS_CeedOperatorApply, Q, G, 0, 0)); 178 PetscCall(PetscLogGpuTimeBegin()); 179 PetscCallCeed(user->ceed, CeedOperatorApply(user->op_ifunction, user->q_ceed, user->g_ceed, CEED_REQUEST_IMMEDIATE)); 180 PetscCall(PetscLogGpuTimeEnd()); 181 PetscCall(PetscLogEventEnd(FLUIDS_CeedOperatorApply, Q, G, 0, 0)); 182 183 // Restore vectors 184 PetscCall(VecReadC2P(user->q_ceed, q_mem_type, Q_loc)); 185 PetscCall(VecReadC2P(user->q_dot_ceed, q_dot_mem_type, Q_dot_loc)); 186 PetscCall(VecC2P(user->g_ceed, g_mem_type, G_loc)); 187 188 if (user->app_ctx->sgs_model_type == SGS_MODEL_DATA_DRIVEN) { 189 PetscCall(SgsDDApplyIFunction(user, Q_loc, G_loc)); 190 } 191 192 // Local-to-Global 193 PetscCall(VecZeroEntries(G)); 194 PetscCall(DMLocalToGlobal(user->dm, G_loc, ADD_VALUES, G)); 195 196 // Restore vectors 197 PetscCall(DMRestoreNamedLocalVector(user->dm, "ResidualLocal", &G_loc)); 198 PetscFunctionReturn(PETSC_SUCCESS); 199 } 200 201 PetscErrorCode FormIJacobian_NS(TS ts, PetscReal t, Vec Q, Vec Q_dot, PetscReal shift, Mat J, Mat J_pre, void *user_data) { 202 User user = *(User *)user_data; 203 Ceed ceed = user->ceed; 204 PetscBool J_is_matceed, J_is_mffd, J_pre_is_matceed, J_pre_is_mffd; 205 206 PetscFunctionBeginUser; 207 PetscCall(PetscObjectTypeCompare((PetscObject)J, MATMFFD, &J_is_mffd)); 208 PetscCall(PetscObjectTypeCompare((PetscObject)J, MATCEED, &J_is_matceed)); 209 PetscCall(PetscObjectTypeCompare((PetscObject)J_pre, MATMFFD, &J_pre_is_mffd)); 210 PetscCall(PetscObjectTypeCompare((PetscObject)J_pre, MATCEED, &J_pre_is_matceed)); 211 if (user->phys->ijacobian_time_shift_label) { 212 CeedOperator op_ijacobian; 213 214 PetscCall(MatCeedGetCeedOperators(user->mat_ijacobian, &op_ijacobian, NULL)); 215 PetscCallCeed(ceed, CeedOperatorSetContextDouble(op_ijacobian, user->phys->ijacobian_time_shift_label, &shift)); 216 } 217 218 if (J_is_matceed || J_is_mffd) { 219 PetscCall(MatAssemblyBegin(J, MAT_FINAL_ASSEMBLY)); 220 PetscCall(MatAssemblyEnd(J, MAT_FINAL_ASSEMBLY)); 221 } else PetscCall(MatCeedAssembleCOO(user->mat_ijacobian, J)); 222 223 if (J_pre_is_matceed && J != J_pre) { 224 PetscCall(MatAssemblyBegin(J_pre, MAT_FINAL_ASSEMBLY)); 225 PetscCall(MatAssemblyEnd(J_pre, MAT_FINAL_ASSEMBLY)); 226 } else if (!J_pre_is_matceed && !J_pre_is_mffd && J != J_pre) { 227 PetscCall(MatCeedAssembleCOO(user->mat_ijacobian, J_pre)); 228 } 229 PetscFunctionReturn(PETSC_SUCCESS); 230 } 231 232 PetscErrorCode WriteOutput(User user, Vec Q, PetscInt step_no, PetscScalar time) { 233 Vec Q_loc; 234 char file_path[PETSC_MAX_PATH_LEN]; 235 PetscViewer viewer; 236 237 PetscFunctionBeginUser; 238 if (user->app_ctx->checkpoint_vtk) { 239 // Set up output 240 PetscCall(DMGetLocalVector(user->dm, &Q_loc)); 241 PetscCall(PetscObjectSetName((PetscObject)Q_loc, "StateVec")); 242 PetscCall(VecZeroEntries(Q_loc)); 243 PetscCall(DMGlobalToLocal(user->dm, Q, INSERT_VALUES, Q_loc)); 244 245 // Output 246 PetscCall(PetscSNPrintf(file_path, sizeof file_path, "%s/ns-%03" PetscInt_FMT ".vtu", user->app_ctx->output_dir, step_no)); 247 248 PetscCall(PetscViewerVTKOpen(PetscObjectComm((PetscObject)Q), file_path, FILE_MODE_WRITE, &viewer)); 249 PetscCall(VecView(Q_loc, viewer)); 250 PetscCall(PetscViewerDestroy(&viewer)); 251 if (user->dm_viz) { 252 Vec Q_refined, Q_refined_loc; 253 char file_path_refined[PETSC_MAX_PATH_LEN]; 254 PetscViewer viewer_refined; 255 256 PetscCall(DMGetGlobalVector(user->dm_viz, &Q_refined)); 257 PetscCall(DMGetLocalVector(user->dm_viz, &Q_refined_loc)); 258 PetscCall(PetscObjectSetName((PetscObject)Q_refined_loc, "Refined")); 259 260 PetscCall(MatInterpolate(user->interp_viz, Q, Q_refined)); 261 PetscCall(VecZeroEntries(Q_refined_loc)); 262 PetscCall(DMGlobalToLocal(user->dm_viz, Q_refined, INSERT_VALUES, Q_refined_loc)); 263 264 PetscCall( 265 PetscSNPrintf(file_path_refined, sizeof file_path_refined, "%s/nsrefined-%03" PetscInt_FMT ".vtu", user->app_ctx->output_dir, step_no)); 266 267 PetscCall(PetscViewerVTKOpen(PetscObjectComm((PetscObject)Q_refined), file_path_refined, FILE_MODE_WRITE, &viewer_refined)); 268 PetscCall(VecView(Q_refined_loc, viewer_refined)); 269 PetscCall(DMRestoreLocalVector(user->dm_viz, &Q_refined_loc)); 270 PetscCall(DMRestoreGlobalVector(user->dm_viz, &Q_refined)); 271 PetscCall(PetscViewerDestroy(&viewer_refined)); 272 } 273 PetscCall(DMRestoreLocalVector(user->dm, &Q_loc)); 274 } 275 276 // Save data in a binary file for continuation of simulations 277 if (user->app_ctx->add_stepnum2bin) { 278 PetscCall(PetscSNPrintf(file_path, sizeof file_path, "%s/ns-solution-%" PetscInt_FMT ".bin", user->app_ctx->output_dir, step_no)); 279 } else { 280 PetscCall(PetscSNPrintf(file_path, sizeof file_path, "%s/ns-solution.bin", user->app_ctx->output_dir)); 281 } 282 PetscCall(PetscViewerBinaryOpen(user->comm, file_path, FILE_MODE_WRITE, &viewer)); 283 284 PetscInt32 token = PetscDefined(USE_64BIT_INDICES) ? FLUIDS_FILE_TOKEN_64 : FLUIDS_FILE_TOKEN_32; 285 PetscCall(PetscViewerBinaryWrite(viewer, &token, 1, PETSC_INT32)); 286 PetscCall(PetscViewerBinaryWrite(viewer, &step_no, 1, PETSC_INT)); 287 time /= user->units->second; // Dimensionalize time back 288 PetscCall(PetscViewerBinaryWrite(viewer, &time, 1, PETSC_REAL)); 289 PetscCall(VecView(Q, viewer)); 290 PetscCall(PetscViewerDestroy(&viewer)); 291 PetscFunctionReturn(PETSC_SUCCESS); 292 } 293 294 // CSV Monitor 295 PetscErrorCode TSMonitor_WallForce(TS ts, PetscInt step_no, PetscReal time, Vec Q, void *ctx) { 296 User user = ctx; 297 Vec G_loc; 298 PetscInt num_wall = user->app_ctx->wall_forces.num_wall, dim = 3; 299 const PetscInt *walls = user->app_ctx->wall_forces.walls; 300 PetscViewer viewer = user->app_ctx->wall_forces.viewer; 301 PetscViewerFormat format = user->app_ctx->wall_forces.viewer_format; 302 PetscScalar *reaction_force; 303 PetscBool iascii; 304 305 PetscFunctionBeginUser; 306 if (!viewer) PetscFunctionReturn(PETSC_SUCCESS); 307 PetscCall(DMGetNamedLocalVector(user->dm, "ResidualLocal", &G_loc)); 308 PetscCall(PetscMalloc1(num_wall * dim, &reaction_force)); 309 PetscCall(Surface_Forces_NS(user->dm, G_loc, num_wall, walls, reaction_force)); 310 PetscCall(DMRestoreNamedLocalVector(user->dm, "ResidualLocal", &G_loc)); 311 312 PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERASCII, &iascii)); 313 314 if (iascii) { 315 if (format == PETSC_VIEWER_ASCII_CSV && !user->app_ctx->wall_forces.header_written) { 316 PetscCall(PetscViewerASCIIPrintf(viewer, "Step,Time,Wall,ForceX,ForceY,ForceZ\n")); 317 user->app_ctx->wall_forces.header_written = PETSC_TRUE; 318 } 319 for (PetscInt w = 0; w < num_wall; w++) { 320 PetscInt wall = walls[w]; 321 if (format == PETSC_VIEWER_ASCII_CSV) { 322 PetscCall(PetscViewerASCIIPrintf(viewer, "%" PetscInt_FMT ",%g,%" PetscInt_FMT ",%g,%g,%g\n", step_no, time, wall, 323 reaction_force[w * dim + 0], reaction_force[w * dim + 1], reaction_force[w * dim + 2])); 324 325 } else { 326 PetscCall(PetscViewerASCIIPrintf(viewer, "Wall %" PetscInt_FMT " Forces: Force_x = %12g, Force_y = %12g, Force_z = %12g\n", wall, 327 reaction_force[w * dim + 0], reaction_force[w * dim + 1], reaction_force[w * dim + 2])); 328 } 329 } 330 } 331 PetscCall(PetscFree(reaction_force)); 332 PetscFunctionReturn(PETSC_SUCCESS); 333 } 334 335 // User provided TS Monitor 336 PetscErrorCode TSMonitor_NS(TS ts, PetscInt step_no, PetscReal time, Vec Q, void *ctx) { 337 User user = ctx; 338 339 PetscFunctionBeginUser; 340 // Print every 'checkpoint_interval' steps 341 if (user->app_ctx->checkpoint_interval <= 0 || step_no % user->app_ctx->checkpoint_interval != 0 || 342 (user->app_ctx->cont_steps == step_no && step_no != 0)) { 343 PetscFunctionReturn(PETSC_SUCCESS); 344 } 345 346 PetscCall(WriteOutput(user, Q, step_no, time)); 347 PetscFunctionReturn(PETSC_SUCCESS); 348 } 349 350 // TS: Create, setup, and solve 351 PetscErrorCode TSSolve_NS(DM dm, User user, AppCtx app_ctx, Physics phys, Vec *Q, PetscScalar *f_time, TS *ts) { 352 MPI_Comm comm = user->comm; 353 TSAdapt adapt; 354 PetscScalar final_time; 355 356 PetscFunctionBeginUser; 357 PetscCall(TSCreate(comm, ts)); 358 PetscCall(TSSetDM(*ts, dm)); 359 PetscCall(TSSetApplicationContext(*ts, user)); 360 if (phys->implicit) { 361 PetscCall(TSSetType(*ts, TSBDF)); 362 if (user->op_ifunction) { 363 PetscCall(TSSetIFunction(*ts, NULL, IFunction_NS, &user)); 364 } else { // Implicit integrators can fall back to using an RHSFunction 365 PetscCall(TSSetRHSFunction(*ts, NULL, RHS_NS, &user)); 366 } 367 if (user->mat_ijacobian) { 368 PetscCall(DMTSSetIJacobian(dm, FormIJacobian_NS, &user)); 369 } 370 } else { 371 PetscCheck(user->op_rhs_ctx, comm, PETSC_ERR_ARG_NULL, "Problem does not provide RHSFunction"); 372 PetscCall(TSSetType(*ts, TSRK)); 373 PetscCall(TSRKSetType(*ts, TSRK5F)); 374 PetscCall(TSSetRHSFunction(*ts, NULL, RHS_NS, &user)); 375 } 376 PetscCall(TSSetMaxTime(*ts, 500. * user->units->second)); 377 PetscCall(TSSetExactFinalTime(*ts, TS_EXACTFINALTIME_STEPOVER)); 378 if (app_ctx->test_type == TESTTYPE_NONE) PetscCall(TSSetErrorIfStepFails(*ts, PETSC_FALSE)); 379 PetscCall(TSSetTimeStep(*ts, 1.e-2 * user->units->second)); 380 PetscCall(TSGetAdapt(*ts, &adapt)); 381 PetscCall(TSAdaptSetStepLimits(adapt, 1.e-12 * user->units->second, 1.e2 * user->units->second)); 382 PetscCall(TSSetFromOptions(*ts)); 383 if (user->mat_ijacobian) { 384 if (app_ctx->amat_type && !strcmp(app_ctx->amat_type, MATSHELL)) { 385 PetscBool use_matceed_pmat; 386 SNES snes; 387 KSP ksp; 388 PC pc; 389 PCType pc_type; 390 Mat Pmat; 391 392 PetscCall(TSGetSNES(*ts, &snes)); 393 PetscCall(SNESGetKSP(snes, &ksp)); 394 PetscCall(KSPGetPC(ksp, &pc)); 395 PetscCall(PCGetType(pc, &pc_type)); 396 PetscCall(PetscStrcmpAny(pc_type, &use_matceed_pmat, PCJACOBI, PCVPBJACOBI, PCPBJACOBI, "")); 397 Pmat = use_matceed_pmat ? user->mat_ijacobian : NULL; 398 PetscCall(TSSetIJacobian(*ts, user->mat_ijacobian, Pmat, NULL, NULL)); 399 } 400 } 401 user->time_bc_set = -1.0; // require all BCs be updated 402 if (app_ctx->cont_steps) { // continue from previous timestep data 403 PetscInt count; 404 PetscViewer viewer; 405 406 if (app_ctx->cont_time <= 0) { // Legacy files did not include step number and time 407 PetscCall(PetscViewerBinaryOpen(comm, app_ctx->cont_time_file, FILE_MODE_READ, &viewer)); 408 PetscCall(PetscViewerBinaryRead(viewer, &app_ctx->cont_time, 1, &count, PETSC_REAL)); 409 PetscCall(PetscViewerDestroy(&viewer)); 410 PetscCheck(app_ctx->cont_steps != -1, comm, PETSC_ERR_ARG_INCOMP, 411 "-continue step number not specified, but checkpoint file does not contain a step number (likely written by older code version)"); 412 } 413 PetscCall(TSSetTime(*ts, app_ctx->cont_time * user->units->second)); 414 PetscCall(TSSetStepNumber(*ts, app_ctx->cont_steps)); 415 } 416 if (app_ctx->test_type == TESTTYPE_NONE) { 417 PetscCall(TSMonitorSet(*ts, TSMonitor_NS, user, NULL)); 418 } 419 if (app_ctx->wall_forces.viewer) { 420 PetscCall(TSMonitorSet(*ts, TSMonitor_WallForce, user, NULL)); 421 } 422 if (app_ctx->turb_spanstats_enable) { 423 PetscCall(TSMonitorSet(*ts, TSMonitor_TurbulenceStatistics, user, NULL)); 424 CeedScalar previous_time = app_ctx->cont_time * user->units->second; 425 PetscCallCeed(user->ceed, 426 CeedOperatorSetContextDouble(user->spanstats.op_stats_collect_ctx->op, user->spanstats.previous_time_label, &previous_time)); 427 } 428 if (app_ctx->diff_filter_monitor) PetscCall(TSMonitorSet(*ts, TSMonitor_DifferentialFilter, user, NULL)); 429 430 if (app_ctx->sgs_train_enable) { 431 PetscCall(TSMonitorSet(*ts, TSMonitor_SGS_DD_Training, user, NULL)); 432 PetscCall(TSSetPostStep(*ts, TSPostStep_SGS_DD_Training)); 433 } 434 // Solve 435 PetscReal start_time; 436 PetscInt start_step; 437 PetscCall(TSGetTime(*ts, &start_time)); 438 PetscCall(TSGetStepNumber(*ts, &start_step)); 439 440 PetscCall(PetscLogDefaultBegin()); // So we can use PetscLogStageGetPerfInfo without -log_view 441 PetscPreLoadBegin(PETSC_FALSE, "Fluids Solve"); 442 PetscCall(TSSetTime(*ts, start_time)); 443 PetscCall(TSSetStepNumber(*ts, start_step)); 444 if (PetscPreLoadingOn) { 445 // LCOV_EXCL_START 446 SNES snes; 447 Vec Q_preload; 448 PetscReal rtol; 449 PetscCall(VecDuplicate(*Q, &Q_preload)); 450 PetscCall(VecCopy(*Q, Q_preload)); 451 PetscCall(TSGetSNES(*ts, &snes)); 452 PetscCall(SNESGetTolerances(snes, NULL, &rtol, NULL, NULL, NULL)); 453 PetscCall(SNESSetTolerances(snes, PETSC_DEFAULT, .99, PETSC_DEFAULT, PETSC_DEFAULT, PETSC_DEFAULT)); 454 PetscCall(TSSetSolution(*ts, Q_preload)); 455 PetscCall(TSStep(*ts)); 456 PetscCall(SNESSetTolerances(snes, PETSC_DEFAULT, rtol, PETSC_DEFAULT, PETSC_DEFAULT, PETSC_DEFAULT)); 457 PetscCall(VecDestroy(&Q_preload)); 458 // LCOV_EXCL_STOP 459 } else { 460 PetscCall(PetscBarrier((PetscObject)*ts)); 461 PetscCall(TSSolve(*ts, *Q)); 462 } 463 PetscPreLoadEnd(); 464 465 PetscCall(TSGetSolveTime(*ts, &final_time)); 466 *f_time = final_time; 467 468 if (app_ctx->test_type == TESTTYPE_NONE) { 469 PetscInt step_no; 470 PetscCall(TSGetStepNumber(*ts, &step_no)); 471 if (user->app_ctx->checkpoint_interval > 0 || user->app_ctx->checkpoint_interval == -1) { 472 PetscCall(WriteOutput(user, *Q, step_no, final_time)); 473 } 474 475 PetscLogStage stage_id; 476 PetscEventPerfInfo stage_perf; 477 478 PetscCall(PetscLogStageGetId("Fluids Solve", &stage_id)); 479 PetscCall(PetscLogStageGetPerfInfo(stage_id, &stage_perf)); 480 PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Time taken for solution (sec): %g\n", stage_perf.time)); 481 } 482 PetscFunctionReturn(PETSC_SUCCESS); 483 } 484