1 // SPDX-FileCopyrightText: Copyright (c) 2017-2024, HONEE contributors. 2 // SPDX-License-Identifier: Apache-2.0 OR BSD-2-Clause 3 4 /// @file 5 /// Time-stepping functions for Navier-Stokes example using PETSc 6 7 #include <ceed.h> 8 #include <petscdmplex.h> 9 #include <petscts.h> 10 11 #include <navierstokes.h> 12 #include "../qfunctions/newtonian_state.h" 13 14 // Insert Boundary values if it's a new time 15 PetscErrorCode UpdateBoundaryValues(User user, Vec Q_loc, PetscReal t) { 16 PetscFunctionBeginUser; 17 if (user->time_bc_set != t) { 18 PetscCall(DMPlexInsertBoundaryValues(user->dm, PETSC_TRUE, Q_loc, t, NULL, NULL, NULL)); 19 user->time_bc_set = t; 20 } 21 PetscFunctionReturn(PETSC_SUCCESS); 22 } 23 24 // RHS (Explicit time-stepper) function setup 25 // This is the RHS of the ODE, given as u_t = G(t,u) 26 // This function takes in a state vector Q and writes into G 27 PetscErrorCode RHS_NS(TS ts, PetscReal t, Vec Q, Vec G, void *user_data) { 28 User user = *(User *)user_data; 29 Ceed ceed = user->ceed; 30 PetscScalar dt; 31 Vec Q_loc = user->Q_loc; 32 PetscMemType q_mem_type; 33 34 PetscFunctionBeginUser; 35 // Update time dependent data 36 PetscCall(UpdateBoundaryValues(user, Q_loc, t)); 37 if (user->phys->solution_time_label) PetscCallCeed(ceed, CeedOperatorSetContextDouble(user->op_rhs_ctx->op, user->phys->solution_time_label, &t)); 38 PetscCall(TSGetTimeStep(ts, &dt)); 39 if (user->phys->timestep_size_label) PetscCallCeed(ceed, CeedOperatorSetContextDouble(user->op_rhs_ctx->op, user->phys->timestep_size_label, &dt)); 40 41 PetscCall(ApplyCeedOperatorGlobalToGlobal(Q, G, user->op_rhs_ctx)); 42 43 PetscCall(VecReadPetscToCeed(Q_loc, &q_mem_type, user->q_ceed)); 44 45 // Inverse of the mass matrix 46 PetscCall(KSPSolve(user->mass_ksp, G, G)); 47 48 PetscCall(VecReadCeedToPetsc(user->q_ceed, q_mem_type, Q_loc)); 49 PetscFunctionReturn(PETSC_SUCCESS); 50 } 51 52 // Surface forces function setup 53 static PetscErrorCode Surface_Forces_NS(DM dm, Vec G_loc, PetscInt num_walls, const PetscInt walls[], PetscScalar *reaction_force) { 54 DMLabel face_label; 55 const PetscScalar *g; 56 PetscInt dof, dim = 3; 57 MPI_Comm comm; 58 PetscSection s; 59 60 PetscFunctionBeginUser; 61 PetscCall(PetscArrayzero(reaction_force, num_walls * dim)); 62 PetscCall(PetscObjectGetComm((PetscObject)dm, &comm)); 63 PetscCall(DMGetLabel(dm, "Face Sets", &face_label)); 64 PetscCall(VecGetArrayRead(G_loc, &g)); 65 for (PetscInt w = 0; w < num_walls; w++) { 66 const PetscInt wall = walls[w]; 67 IS wall_is; 68 PetscCall(DMGetLocalSection(dm, &s)); 69 PetscCall(DMLabelGetStratumIS(face_label, wall, &wall_is)); 70 if (wall_is) { // There exist such points on this process 71 PetscInt num_points; 72 PetscInt num_comp = 0; 73 const PetscInt *points; 74 PetscCall(PetscSectionGetFieldComponents(s, 0, &num_comp)); 75 PetscCall(ISGetSize(wall_is, &num_points)); 76 PetscCall(ISGetIndices(wall_is, &points)); 77 for (PetscInt i = 0; i < num_points; i++) { 78 const PetscInt p = points[i]; 79 const StateConservative *r; 80 PetscCall(DMPlexPointLocalRead(dm, p, g, &r)); 81 PetscCall(PetscSectionGetDof(s, p, &dof)); 82 for (PetscInt node = 0; node < dof / num_comp; node++) { 83 for (PetscInt j = 0; j < 3; j++) { 84 reaction_force[w * dim + j] -= r[node].momentum[j]; 85 } 86 } 87 } 88 PetscCall(ISRestoreIndices(wall_is, &points)); 89 } 90 PetscCall(ISDestroy(&wall_is)); 91 } 92 PetscCallMPI(MPI_Allreduce(MPI_IN_PLACE, reaction_force, dim * num_walls, MPIU_SCALAR, MPI_SUM, comm)); 93 // Restore Vectors 94 PetscCall(VecRestoreArrayRead(G_loc, &g)); 95 PetscFunctionReturn(PETSC_SUCCESS); 96 } 97 98 // Implicit time-stepper function setup 99 PetscErrorCode IFunction_NS(TS ts, PetscReal t, Vec Q, Vec Q_dot, Vec G, void *user_data) { 100 User user = *(User *)user_data; 101 Ceed ceed = user->ceed; 102 PetscScalar dt; 103 Vec Q_loc = user->Q_loc, Q_dot_loc = user->Q_dot_loc, G_loc; 104 PetscMemType q_mem_type, q_dot_mem_type, g_mem_type; 105 106 PetscFunctionBeginUser; 107 // Get local vectors 108 PetscCall(DMGetNamedLocalVector(user->dm, "ResidualLocal", &G_loc)); 109 110 // Update time dependent data 111 PetscCall(UpdateBoundaryValues(user, Q_loc, t)); 112 if (user->phys->solution_time_label) PetscCallCeed(ceed, CeedOperatorSetContextDouble(user->op_ifunction, user->phys->solution_time_label, &t)); 113 PetscCall(TSGetTimeStep(ts, &dt)); 114 if (user->phys->timestep_size_label) PetscCallCeed(ceed, CeedOperatorSetContextDouble(user->op_ifunction, user->phys->timestep_size_label, &dt)); 115 116 // Global-to-local 117 PetscCall(DMGlobalToLocalBegin(user->dm, Q, INSERT_VALUES, Q_loc)); 118 PetscCall(DMGlobalToLocalBegin(user->dm, Q_dot, INSERT_VALUES, Q_dot_loc)); 119 PetscCall(DMGlobalToLocalEnd(user->dm, Q, INSERT_VALUES, Q_loc)); 120 PetscCall(DMGlobalToLocalEnd(user->dm, Q_dot, INSERT_VALUES, Q_dot_loc)); 121 122 // Place PETSc vectors in CEED vectors 123 PetscCall(VecReadPetscToCeed(Q_loc, &q_mem_type, user->q_ceed)); 124 PetscCall(VecReadPetscToCeed(Q_dot_loc, &q_dot_mem_type, user->q_dot_ceed)); 125 PetscCall(VecPetscToCeed(G_loc, &g_mem_type, user->g_ceed)); 126 127 // Apply CEED operator 128 PetscCall(PetscLogEventBegin(FLUIDS_CeedOperatorApply, Q, G, 0, 0)); 129 PetscCall(PetscLogGpuTimeBegin()); 130 PetscCallCeed(user->ceed, CeedOperatorApply(user->op_ifunction, user->q_ceed, user->g_ceed, CEED_REQUEST_IMMEDIATE)); 131 PetscCall(PetscLogGpuTimeEnd()); 132 PetscCall(PetscLogEventEnd(FLUIDS_CeedOperatorApply, Q, G, 0, 0)); 133 134 // Restore vectors 135 PetscCall(VecReadCeedToPetsc(user->q_ceed, q_mem_type, Q_loc)); 136 PetscCall(VecReadCeedToPetsc(user->q_dot_ceed, q_dot_mem_type, Q_dot_loc)); 137 PetscCall(VecCeedToPetsc(user->g_ceed, g_mem_type, G_loc)); 138 139 if (user->app_ctx->sgs_model_type == SGS_MODEL_DATA_DRIVEN) { 140 PetscCall(SgsDDApplyIFunction(user, Q_loc, G_loc)); 141 } 142 143 // Local-to-Global 144 PetscCall(VecZeroEntries(G)); 145 PetscCall(DMLocalToGlobal(user->dm, G_loc, ADD_VALUES, G)); 146 147 // Restore vectors 148 PetscCall(DMRestoreNamedLocalVector(user->dm, "ResidualLocal", &G_loc)); 149 PetscFunctionReturn(PETSC_SUCCESS); 150 } 151 152 PetscErrorCode FormIJacobian_NS(TS ts, PetscReal t, Vec Q, Vec Q_dot, PetscReal shift, Mat J, Mat J_pre, void *user_data) { 153 User user = *(User *)user_data; 154 PetscBool J_is_matceed, J_is_mffd, J_pre_is_matceed, J_pre_is_mffd; 155 156 PetscFunctionBeginUser; 157 PetscCall(PetscObjectTypeCompare((PetscObject)J, MATMFFD, &J_is_mffd)); 158 PetscCall(PetscObjectTypeCompare((PetscObject)J, MATCEED, &J_is_matceed)); 159 PetscCall(PetscObjectTypeCompare((PetscObject)J_pre, MATMFFD, &J_pre_is_mffd)); 160 PetscCall(PetscObjectTypeCompare((PetscObject)J_pre, MATCEED, &J_pre_is_matceed)); 161 162 PetscCall(MatCeedSetContextReal(user->mat_ijacobian, "ijacobian time shift", shift)); 163 164 if (J_is_matceed || J_is_mffd) { 165 PetscCall(MatAssemblyBegin(J, MAT_FINAL_ASSEMBLY)); 166 PetscCall(MatAssemblyEnd(J, MAT_FINAL_ASSEMBLY)); 167 } else PetscCall(MatCeedAssembleCOO(user->mat_ijacobian, J)); 168 169 if (J_pre_is_matceed && J != J_pre) { 170 PetscCall(MatAssemblyBegin(J_pre, MAT_FINAL_ASSEMBLY)); 171 PetscCall(MatAssemblyEnd(J_pre, MAT_FINAL_ASSEMBLY)); 172 } else if (!J_pre_is_matceed && !J_pre_is_mffd && J != J_pre) { 173 PetscCall(MatCeedAssembleCOO(user->mat_ijacobian, J_pre)); 174 } 175 PetscFunctionReturn(PETSC_SUCCESS); 176 } 177 178 PetscErrorCode WriteOutput(User user, Vec Q, PetscInt step_no, PetscScalar time) { 179 Vec Q_loc; 180 char file_path[PETSC_MAX_PATH_LEN]; 181 PetscViewer viewer; 182 183 PetscFunctionBeginUser; 184 if (user->app_ctx->checkpoint_vtk) { 185 // Set up output 186 PetscCall(DMGetLocalVector(user->dm, &Q_loc)); 187 PetscCall(PetscObjectSetName((PetscObject)Q_loc, "StateVec")); 188 PetscCall(VecZeroEntries(Q_loc)); 189 PetscCall(DMGlobalToLocal(user->dm, Q, INSERT_VALUES, Q_loc)); 190 191 // Output 192 PetscCall(PetscSNPrintf(file_path, sizeof file_path, "%s/ns-%03" PetscInt_FMT ".vtu", user->app_ctx->output_dir, step_no)); 193 194 PetscCall(PetscViewerVTKOpen(PetscObjectComm((PetscObject)Q), file_path, FILE_MODE_WRITE, &viewer)); 195 PetscCall(VecView(Q_loc, viewer)); 196 PetscCall(PetscViewerDestroy(&viewer)); 197 if (user->dm_viz) { 198 Vec Q_refined, Q_refined_loc; 199 char file_path_refined[PETSC_MAX_PATH_LEN]; 200 PetscViewer viewer_refined; 201 202 PetscCall(DMGetGlobalVector(user->dm_viz, &Q_refined)); 203 PetscCall(DMGetLocalVector(user->dm_viz, &Q_refined_loc)); 204 PetscCall(PetscObjectSetName((PetscObject)Q_refined_loc, "Refined")); 205 206 PetscCall(MatInterpolate(user->interp_viz, Q, Q_refined)); 207 PetscCall(VecZeroEntries(Q_refined_loc)); 208 PetscCall(DMGlobalToLocal(user->dm_viz, Q_refined, INSERT_VALUES, Q_refined_loc)); 209 210 PetscCall( 211 PetscSNPrintf(file_path_refined, sizeof file_path_refined, "%s/nsrefined-%03" PetscInt_FMT ".vtu", user->app_ctx->output_dir, step_no)); 212 213 PetscCall(PetscViewerVTKOpen(PetscObjectComm((PetscObject)Q_refined), file_path_refined, FILE_MODE_WRITE, &viewer_refined)); 214 PetscCall(VecView(Q_refined_loc, viewer_refined)); 215 PetscCall(DMRestoreLocalVector(user->dm_viz, &Q_refined_loc)); 216 PetscCall(DMRestoreGlobalVector(user->dm_viz, &Q_refined)); 217 PetscCall(PetscViewerDestroy(&viewer_refined)); 218 } 219 PetscCall(DMRestoreLocalVector(user->dm, &Q_loc)); 220 } 221 222 // Save data in a binary file for continuation of simulations 223 if (user->app_ctx->add_stepnum2bin) { 224 PetscCall(PetscSNPrintf(file_path, sizeof file_path, "%s/ns-solution-%" PetscInt_FMT ".bin", user->app_ctx->output_dir, step_no)); 225 } else { 226 PetscCall(PetscSNPrintf(file_path, sizeof file_path, "%s/ns-solution.bin", user->app_ctx->output_dir)); 227 } 228 PetscCall(PetscViewerBinaryOpen(user->comm, file_path, FILE_MODE_WRITE, &viewer)); 229 230 time /= user->units->second; // Dimensionalize time back 231 PetscCall(HoneeWriteBinaryVec(viewer, Q, time, step_no)); 232 PetscCall(PetscViewerDestroy(&viewer)); 233 PetscFunctionReturn(PETSC_SUCCESS); 234 } 235 236 // CSV Monitor 237 PetscErrorCode TSMonitor_WallForce(TS ts, PetscInt step_no, PetscReal time, Vec Q, void *ctx) { 238 User user = ctx; 239 Vec G_loc; 240 PetscInt num_wall = user->app_ctx->wall_forces.num_wall, dim = 3; 241 const PetscInt *walls = user->app_ctx->wall_forces.walls; 242 PetscViewer viewer = user->app_ctx->wall_forces.viewer; 243 PetscViewerFormat format = user->app_ctx->wall_forces.viewer_format; 244 PetscScalar *reaction_force; 245 PetscBool iascii; 246 247 PetscFunctionBeginUser; 248 if (!viewer) PetscFunctionReturn(PETSC_SUCCESS); 249 PetscCall(DMGetNamedLocalVector(user->dm, "ResidualLocal", &G_loc)); 250 PetscCall(PetscMalloc1(num_wall * dim, &reaction_force)); 251 PetscCall(Surface_Forces_NS(user->dm, G_loc, num_wall, walls, reaction_force)); 252 PetscCall(DMRestoreNamedLocalVector(user->dm, "ResidualLocal", &G_loc)); 253 254 PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERASCII, &iascii)); 255 256 if (iascii) { 257 if (format == PETSC_VIEWER_ASCII_CSV && !user->app_ctx->wall_forces.header_written) { 258 PetscCall(PetscViewerASCIIPrintf(viewer, "Step,Time,Wall,ForceX,ForceY,ForceZ\n")); 259 user->app_ctx->wall_forces.header_written = PETSC_TRUE; 260 } 261 for (PetscInt w = 0; w < num_wall; w++) { 262 PetscInt wall = walls[w]; 263 if (format == PETSC_VIEWER_ASCII_CSV) { 264 PetscCall(PetscViewerASCIIPrintf(viewer, "%" PetscInt_FMT ",%g,%" PetscInt_FMT ",%g,%g,%g\n", step_no, time, wall, 265 reaction_force[w * dim + 0], reaction_force[w * dim + 1], reaction_force[w * dim + 2])); 266 267 } else { 268 PetscCall(PetscViewerASCIIPrintf(viewer, "Wall %" PetscInt_FMT " Forces: Force_x = %12g, Force_y = %12g, Force_z = %12g\n", wall, 269 reaction_force[w * dim + 0], reaction_force[w * dim + 1], reaction_force[w * dim + 2])); 270 } 271 } 272 } 273 PetscCall(PetscFree(reaction_force)); 274 PetscFunctionReturn(PETSC_SUCCESS); 275 } 276 277 // User provided TS Monitor 278 PetscErrorCode TSMonitor_NS(TS ts, PetscInt step_no, PetscReal time, Vec Q, void *ctx) { 279 User user = ctx; 280 281 PetscFunctionBeginUser; 282 // Print every 'checkpoint_interval' steps 283 if (user->app_ctx->checkpoint_interval <= 0 || step_no % user->app_ctx->checkpoint_interval != 0 || 284 (user->app_ctx->cont_steps == step_no && step_no != 0)) { 285 PetscFunctionReturn(PETSC_SUCCESS); 286 } 287 288 PetscCall(WriteOutput(user, Q, step_no, time)); 289 PetscFunctionReturn(PETSC_SUCCESS); 290 } 291 292 // TS: Create, setup, and solve 293 PetscErrorCode TSSolve_NS(DM dm, User user, AppCtx app_ctx, Physics phys, ProblemData problem, Vec *Q, PetscScalar *f_time, TS *ts) { 294 MPI_Comm comm = user->comm; 295 TSAdapt adapt; 296 PetscScalar final_time; 297 298 PetscFunctionBeginUser; 299 PetscCall(TSCreate(comm, ts)); 300 PetscCall(TSSetDM(*ts, dm)); 301 PetscCall(TSSetApplicationContext(*ts, user)); 302 if (phys->implicit) { 303 PetscCall(TSSetType(*ts, TSBDF)); 304 if (user->op_ifunction) { 305 PetscCall(TSSetIFunction(*ts, NULL, IFunction_NS, &user)); 306 } else { // Implicit integrators can fall back to using an RHSFunction 307 PetscCall(TSSetRHSFunction(*ts, NULL, RHS_NS, &user)); 308 } 309 if (user->mat_ijacobian) { 310 PetscCall(DMTSSetIJacobian(dm, FormIJacobian_NS, &user)); 311 } 312 } else { 313 PetscCheck(user->op_rhs_ctx, comm, PETSC_ERR_ARG_NULL, "Problem does not provide RHSFunction"); 314 PetscCall(TSSetType(*ts, TSRK)); 315 PetscCall(TSRKSetType(*ts, TSRK5F)); 316 PetscCall(TSSetRHSFunction(*ts, NULL, RHS_NS, &user)); 317 } 318 PetscCall(TSSetMaxTime(*ts, 500. * user->units->second)); 319 PetscCall(TSSetExactFinalTime(*ts, TS_EXACTFINALTIME_STEPOVER)); 320 if (app_ctx->test_type == TESTTYPE_NONE) PetscCall(TSSetErrorIfStepFails(*ts, PETSC_FALSE)); 321 PetscCall(TSSetTimeStep(*ts, 1.e-2 * user->units->second)); 322 PetscCall(TSGetAdapt(*ts, &adapt)); 323 PetscCall(TSAdaptSetStepLimits(adapt, 1.e-12 * user->units->second, 1.e2 * user->units->second)); 324 PetscCall(TSSetFromOptions(*ts)); 325 if (user->mat_ijacobian) { 326 if (app_ctx->amat_type && !strcmp(app_ctx->amat_type, MATSHELL)) { 327 SNES snes; 328 KSP ksp; 329 Mat Pmat, Amat; 330 331 PetscCall(TSGetSNES(*ts, &snes)); 332 PetscCall(SNESGetKSP(snes, &ksp)); 333 PetscCall(CreateSolveOperatorsFromMatCeed(ksp, user->mat_ijacobian, PETSC_FALSE, &Amat, &Pmat)); 334 PetscCall(TSSetIJacobian(*ts, user->mat_ijacobian, Pmat, NULL, NULL)); 335 PetscCall(MatDestroy(&Amat)); 336 PetscCall(MatDestroy(&Pmat)); 337 } 338 } 339 user->time_bc_set = -1.0; // require all BCs be updated 340 if (app_ctx->cont_steps) { // continue from previous timestep data 341 PetscInt count; 342 PetscViewer viewer; 343 344 if (app_ctx->cont_time <= 0) { // Legacy files did not include step number and time 345 PetscCall(PetscViewerBinaryOpen(comm, app_ctx->cont_time_file, FILE_MODE_READ, &viewer)); 346 PetscCall(PetscViewerBinaryRead(viewer, &app_ctx->cont_time, 1, &count, PETSC_REAL)); 347 PetscCall(PetscViewerDestroy(&viewer)); 348 PetscCheck(app_ctx->cont_steps != -1, comm, PETSC_ERR_ARG_INCOMP, 349 "-continue step number not specified, but checkpoint file does not contain a step number (likely written by older code version)"); 350 } 351 PetscCall(TSSetTime(*ts, app_ctx->cont_time * user->units->second)); 352 PetscCall(TSSetStepNumber(*ts, app_ctx->cont_steps)); 353 } 354 if (app_ctx->test_type == TESTTYPE_NONE) { 355 PetscCall(TSMonitorSet(*ts, TSMonitor_NS, user, NULL)); 356 } 357 if (app_ctx->wall_forces.viewer) { 358 PetscCall(TSMonitorSet(*ts, TSMonitor_WallForce, user, NULL)); 359 } 360 if (app_ctx->turb_spanstats_enable) { 361 PetscCall(TSMonitorSet(*ts, TSMonitor_TurbulenceStatistics, user, NULL)); 362 CeedScalar previous_time = app_ctx->cont_time * user->units->second; 363 PetscCallCeed(user->ceed, 364 CeedOperatorSetContextDouble(user->spanstats.op_stats_collect_ctx->op, user->spanstats.previous_time_label, &previous_time)); 365 } 366 if (app_ctx->diff_filter_monitor) PetscCall(TSMonitorSet(*ts, TSMonitor_DifferentialFilter, user, NULL)); 367 368 if (app_ctx->sgs_train_enable) { 369 PetscCall(TSMonitorSet(*ts, TSMonitor_SGS_DD_Training, user, NULL)); 370 PetscCall(TSSetPostStep(*ts, TSPostStep_SGS_DD_Training)); 371 } 372 373 if (app_ctx->test_type == TESTTYPE_NONE) PetscCall(PrintRunInfo(user, user->phys, problem, *ts)); 374 // Solve 375 PetscReal start_time; 376 PetscInt start_step; 377 PetscCall(TSGetTime(*ts, &start_time)); 378 PetscCall(TSGetStepNumber(*ts, &start_step)); 379 380 PetscCall(PetscLogDefaultBegin()); // So we can use PetscLogStageGetPerfInfo without -log_view 381 PetscPreLoadBegin(PETSC_FALSE, "Fluids Solve"); 382 PetscCall(TSSetTime(*ts, start_time)); 383 PetscCall(TSSetStepNumber(*ts, start_step)); 384 if (PetscPreLoadingOn) { 385 // LCOV_EXCL_START 386 SNES snes; 387 Vec Q_preload; 388 PetscReal rtol; 389 PetscCall(VecDuplicate(*Q, &Q_preload)); 390 PetscCall(VecCopy(*Q, Q_preload)); 391 PetscCall(TSGetSNES(*ts, &snes)); 392 PetscCall(SNESGetTolerances(snes, NULL, &rtol, NULL, NULL, NULL)); 393 PetscCall(SNESSetTolerances(snes, PETSC_DEFAULT, .99, PETSC_DEFAULT, PETSC_DEFAULT, PETSC_DEFAULT)); 394 PetscCall(TSSetSolution(*ts, Q_preload)); 395 PetscCall(TSStep(*ts)); 396 PetscCall(SNESSetTolerances(snes, PETSC_DEFAULT, rtol, PETSC_DEFAULT, PETSC_DEFAULT, PETSC_DEFAULT)); 397 PetscCall(VecDestroy(&Q_preload)); 398 // LCOV_EXCL_STOP 399 } else { 400 PetscCall(PetscBarrier((PetscObject)*ts)); 401 PetscCall(TSSolve(*ts, *Q)); 402 } 403 PetscPreLoadEnd(); 404 405 PetscCall(TSGetSolveTime(*ts, &final_time)); 406 *f_time = final_time; 407 408 if (app_ctx->test_type == TESTTYPE_NONE) { 409 PetscInt step_no; 410 PetscCall(TSGetStepNumber(*ts, &step_no)); 411 if (user->app_ctx->checkpoint_interval > 0 || user->app_ctx->checkpoint_interval == -1) { 412 PetscCall(WriteOutput(user, *Q, step_no, final_time)); 413 } 414 415 PetscLogStage stage_id; 416 PetscEventPerfInfo stage_perf; 417 418 PetscCall(PetscLogStageGetId("Fluids Solve", &stage_id)); 419 PetscCall(PetscLogStageGetPerfInfo(stage_id, &stage_perf)); 420 PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Time taken for solution (sec): %g\n", stage_perf.time)); 421 } 422 PetscFunctionReturn(PETSC_SUCCESS); 423 } 424