1 #include <petsctao.h> 2 #include <petscts.h> 3 4 typedef struct _n_aircraft *Aircraft; 5 struct _n_aircraft { 6 TS ts,quadts; 7 Vec V,W; /* control variables V and W */ 8 PetscInt nsteps; /* number of time steps */ 9 PetscReal ftime; 10 Mat A,H; 11 Mat Jacp,DRDU,DRDP; 12 Vec U,Lambda[1],Mup[1],Lambda2[1],Mup2[1],Dir; 13 Vec rhshp1[1],rhshp2[1],rhshp3[1],rhshp4[1],inthp1[1],inthp2[1],inthp3[1],inthp4[1]; 14 PetscReal lv,lw; 15 PetscBool mf,eh; 16 }; 17 18 PetscErrorCode FormObjFunctionGradient(Tao,Vec,PetscReal *,Vec,void *); 19 PetscErrorCode FormObjHessian(Tao,Vec,Mat,Mat,void *); 20 PetscErrorCode ComputeObjHessianWithSOA(Vec,PetscScalar[],Aircraft); 21 PetscErrorCode MatrixFreeObjHessian(Tao,Vec,Mat,Mat,void *); 22 PetscErrorCode MyMatMult(Mat,Vec,Vec); 23 24 static PetscErrorCode RHSFunction(TS ts,PetscReal t,Vec U,Vec F,void *ctx) 25 { 26 Aircraft actx = (Aircraft)ctx; 27 const PetscScalar *u,*v,*w; 28 PetscScalar *f; 29 PetscInt step; 30 31 PetscFunctionBeginUser; 32 PetscCall(TSGetStepNumber(ts,&step)); 33 PetscCall(VecGetArrayRead(U,&u)); 34 PetscCall(VecGetArrayRead(actx->V,&v)); 35 PetscCall(VecGetArrayRead(actx->W,&w)); 36 PetscCall(VecGetArray(F,&f)); 37 f[0] = v[step]*PetscCosReal(w[step]); 38 f[1] = v[step]*PetscSinReal(w[step]); 39 PetscCall(VecRestoreArrayRead(U,&u)); 40 PetscCall(VecRestoreArrayRead(actx->V,&v)); 41 PetscCall(VecRestoreArrayRead(actx->W,&w)); 42 PetscCall(VecRestoreArray(F,&f)); 43 PetscFunctionReturn(0); 44 } 45 46 static PetscErrorCode RHSJacobianP(TS ts,PetscReal t,Vec U,Mat A,void *ctx) 47 { 48 Aircraft actx = (Aircraft)ctx; 49 const PetscScalar *u,*v,*w; 50 PetscInt step,rows[2] = {0,1},rowcol[2]; 51 PetscScalar Jp[2][2]; 52 53 PetscFunctionBeginUser; 54 PetscCall(MatZeroEntries(A)); 55 PetscCall(TSGetStepNumber(ts,&step)); 56 PetscCall(VecGetArrayRead(U,&u)); 57 PetscCall(VecGetArrayRead(actx->V,&v)); 58 PetscCall(VecGetArrayRead(actx->W,&w)); 59 60 Jp[0][0] = PetscCosReal(w[step]); 61 Jp[0][1] = -v[step]*PetscSinReal(w[step]); 62 Jp[1][0] = PetscSinReal(w[step]); 63 Jp[1][1] = v[step]*PetscCosReal(w[step]); 64 65 PetscCall(VecRestoreArrayRead(U,&u)); 66 PetscCall(VecRestoreArrayRead(actx->V,&v)); 67 PetscCall(VecRestoreArrayRead(actx->W,&w)); 68 69 rowcol[0] = 2*step; 70 rowcol[1] = 2*step+1; 71 PetscCall(MatSetValues(A,2,rows,2,rowcol,&Jp[0][0],INSERT_VALUES)); 72 73 PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 74 PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 75 PetscFunctionReturn(0); 76 } 77 78 static PetscErrorCode RHSHessianProductUU(TS ts,PetscReal t,Vec U,Vec *Vl,Vec Vr,Vec *VHV,void *ctx) 79 { 80 PetscFunctionBeginUser; 81 PetscFunctionReturn(0); 82 } 83 84 static PetscErrorCode RHSHessianProductUP(TS ts,PetscReal t,Vec U,Vec *Vl,Vec Vr,Vec *VHV,void *ctx) 85 { 86 PetscFunctionBeginUser; 87 PetscFunctionReturn(0); 88 } 89 90 static PetscErrorCode RHSHessianProductPU(TS ts,PetscReal t,Vec U,Vec *Vl,Vec Vr,Vec *VHV,void *ctx) 91 { 92 PetscFunctionBeginUser; 93 PetscFunctionReturn(0); 94 } 95 96 static PetscErrorCode RHSHessianProductPP(TS ts,PetscReal t,Vec U,Vec *Vl,Vec Vr,Vec *VHV,void *ctx) 97 { 98 Aircraft actx = (Aircraft)ctx; 99 const PetscScalar *v,*w,*vl,*vr,*u; 100 PetscScalar *vhv; 101 PetscScalar dJpdP[2][2][2]={{{0}}}; 102 PetscInt step,i,j,k; 103 104 PetscFunctionBeginUser; 105 PetscCall(TSGetStepNumber(ts,&step)); 106 PetscCall(VecGetArrayRead(U,&u)); 107 PetscCall(VecGetArrayRead(actx->V,&v)); 108 PetscCall(VecGetArrayRead(actx->W,&w)); 109 PetscCall(VecGetArrayRead(Vl[0],&vl)); 110 PetscCall(VecGetArrayRead(Vr,&vr)); 111 PetscCall(VecSet(VHV[0],0.0)); 112 PetscCall(VecGetArray(VHV[0],&vhv)); 113 114 dJpdP[0][0][1] = -PetscSinReal(w[step]); 115 dJpdP[0][1][0] = -PetscSinReal(w[step]); 116 dJpdP[0][1][1] = -v[step]*PetscCosReal(w[step]); 117 dJpdP[1][0][1] = PetscCosReal(w[step]); 118 dJpdP[1][1][0] = PetscCosReal(w[step]); 119 dJpdP[1][1][1] = -v[step]*PetscSinReal(w[step]); 120 121 for (j=0; j<2; j++) { 122 vhv[2*step+j] = 0; 123 for (k=0; k<2; k++) 124 for (i=0; i<2; i++) 125 vhv[2*step+j] += vl[i]*dJpdP[i][j][k]*vr[2*step+k]; 126 } 127 PetscCall(VecRestoreArrayRead(U,&u)); 128 PetscCall(VecRestoreArrayRead(Vl[0],&vl)); 129 PetscCall(VecRestoreArrayRead(Vr,&vr)); 130 PetscCall(VecRestoreArray(VHV[0],&vhv)); 131 PetscFunctionReturn(0); 132 } 133 134 /* Vl in NULL,updates to VHV must be added */ 135 static PetscErrorCode IntegrandHessianProductUU(TS ts,PetscReal t,Vec U,Vec *Vl,Vec Vr,Vec *VHV,void *ctx) 136 { 137 Aircraft actx = (Aircraft)ctx; 138 const PetscScalar *v,*w,*vr,*u; 139 PetscScalar *vhv; 140 PetscScalar dRudU[2][2]={{0}}; 141 PetscInt step,j,k; 142 143 PetscFunctionBeginUser; 144 PetscCall(TSGetStepNumber(ts,&step)); 145 PetscCall(VecGetArrayRead(U,&u)); 146 PetscCall(VecGetArrayRead(actx->V,&v)); 147 PetscCall(VecGetArrayRead(actx->W,&w)); 148 PetscCall(VecGetArrayRead(Vr,&vr)); 149 PetscCall(VecGetArray(VHV[0],&vhv)); 150 151 dRudU[0][0] = 2.0; 152 dRudU[1][1] = 2.0; 153 154 for (j=0; j<2; j++) { 155 vhv[j] = 0; 156 for (k=0; k<2; k++) 157 vhv[j] += dRudU[j][k]*vr[k]; 158 } 159 PetscCall(VecRestoreArrayRead(U,&u)); 160 PetscCall(VecRestoreArrayRead(Vr,&vr)); 161 PetscCall(VecRestoreArray(VHV[0],&vhv)); 162 PetscFunctionReturn(0); 163 } 164 165 static PetscErrorCode IntegrandHessianProductUP(TS ts,PetscReal t,Vec U,Vec *Vl,Vec Vr,Vec *VHV,void *ctx) 166 { 167 PetscFunctionBeginUser; 168 PetscFunctionReturn(0); 169 } 170 171 static PetscErrorCode IntegrandHessianProductPU(TS ts,PetscReal t,Vec U,Vec *Vl,Vec Vr,Vec *VHV,void *ctx) 172 { 173 PetscFunctionBeginUser; 174 PetscFunctionReturn(0); 175 } 176 177 static PetscErrorCode IntegrandHessianProductPP(TS ts,PetscReal t,Vec U,Vec *Vl,Vec Vr,Vec *VHV,void *ctx) 178 { 179 PetscFunctionBeginUser; 180 PetscFunctionReturn(0); 181 } 182 183 static PetscErrorCode CostIntegrand(TS ts,PetscReal t,Vec U,Vec R,void *ctx) 184 { 185 Aircraft actx = (Aircraft)ctx; 186 PetscScalar *r; 187 PetscReal dx,dy; 188 const PetscScalar *u; 189 190 PetscFunctionBegin; 191 PetscCall(VecGetArrayRead(U,&u)); 192 PetscCall(VecGetArray(R,&r)); 193 dx = u[0] - actx->lv*t*PetscCosReal(actx->lw); 194 dy = u[1] - actx->lv*t*PetscSinReal(actx->lw); 195 r[0] = dx*dx+dy*dy; 196 PetscCall(VecRestoreArray(R,&r)); 197 PetscCall(VecRestoreArrayRead(U,&u)); 198 PetscFunctionReturn(0); 199 } 200 201 static PetscErrorCode DRDUJacobianTranspose(TS ts,PetscReal t,Vec U,Mat DRDU,Mat B,void *ctx) 202 { 203 Aircraft actx = (Aircraft)ctx; 204 PetscScalar drdu[2][1]; 205 const PetscScalar *u; 206 PetscReal dx,dy; 207 PetscInt row[] = {0,1},col[] = {0}; 208 209 PetscFunctionBegin; 210 PetscCall(VecGetArrayRead(U,&u)); 211 dx = u[0] - actx->lv*t*PetscCosReal(actx->lw); 212 dy = u[1] - actx->lv*t*PetscSinReal(actx->lw); 213 drdu[0][0] = 2.*dx; 214 drdu[1][0] = 2.*dy; 215 PetscCall(MatSetValues(DRDU,2,row,1,col,&drdu[0][0],INSERT_VALUES)); 216 PetscCall(VecRestoreArrayRead(U,&u)); 217 PetscCall(MatAssemblyBegin(DRDU,MAT_FINAL_ASSEMBLY)); 218 PetscCall(MatAssemblyEnd(DRDU,MAT_FINAL_ASSEMBLY)); 219 PetscFunctionReturn(0); 220 } 221 222 static PetscErrorCode DRDPJacobianTranspose(TS ts,PetscReal t,Vec U,Mat DRDP,void *ctx) 223 { 224 PetscFunctionBegin; 225 PetscCall(MatZeroEntries(DRDP)); 226 PetscCall(MatAssemblyBegin(DRDP,MAT_FINAL_ASSEMBLY)); 227 PetscCall(MatAssemblyEnd(DRDP,MAT_FINAL_ASSEMBLY)); 228 PetscFunctionReturn(0); 229 } 230 231 int main(int argc,char **argv) 232 { 233 Vec P,PL,PU; 234 struct _n_aircraft aircraft; 235 PetscMPIInt size; 236 Tao tao; 237 KSP ksp; 238 PC pc; 239 PetscScalar *u,*p; 240 PetscInt i; 241 242 /* Initialize program */ 243 PetscFunctionBeginUser; 244 PetscCall(PetscInitialize(&argc,&argv,NULL,NULL)); 245 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 246 PetscCheck(size == 1,PETSC_COMM_WORLD,PETSC_ERR_WRONG_MPI_SIZE,"This is a uniprocessor example only!"); 247 248 /* Parameter settings */ 249 aircraft.ftime = 1.; /* time interval in hour */ 250 aircraft.nsteps = 10; /* number of steps */ 251 aircraft.lv = 2.0; /* leader speed in kmph */ 252 aircraft.lw = PETSC_PI/4.; /* leader heading angle */ 253 254 PetscCall(PetscOptionsGetReal(NULL,NULL,"-ftime",&aircraft.ftime,NULL)); 255 PetscCall(PetscOptionsGetInt(NULL,NULL,"-nsteps",&aircraft.nsteps,NULL)); 256 PetscCall(PetscOptionsHasName(NULL,NULL,"-matrixfree",&aircraft.mf)); 257 PetscCall(PetscOptionsHasName(NULL,NULL,"-exacthessian",&aircraft.eh)); 258 259 /* Create TAO solver and set desired solution method */ 260 PetscCall(TaoCreate(PETSC_COMM_WORLD,&tao)); 261 PetscCall(TaoSetType(tao,TAOBQNLS)); 262 263 /* Create necessary matrix and vectors, solve same ODE on every process */ 264 PetscCall(MatCreate(PETSC_COMM_WORLD,&aircraft.A)); 265 PetscCall(MatSetSizes(aircraft.A,PETSC_DECIDE,PETSC_DECIDE,2,2)); 266 PetscCall(MatSetFromOptions(aircraft.A)); 267 PetscCall(MatSetUp(aircraft.A)); 268 PetscCall(MatAssemblyBegin(aircraft.A,MAT_FINAL_ASSEMBLY)); 269 PetscCall(MatAssemblyEnd(aircraft.A,MAT_FINAL_ASSEMBLY)); 270 PetscCall(MatShift(aircraft.A,1)); 271 PetscCall(MatShift(aircraft.A,-1)); 272 273 PetscCall(MatCreate(PETSC_COMM_WORLD,&aircraft.Jacp)); 274 PetscCall(MatSetSizes(aircraft.Jacp,PETSC_DECIDE,PETSC_DECIDE,2,2*aircraft.nsteps)); 275 PetscCall(MatSetFromOptions(aircraft.Jacp)); 276 PetscCall(MatSetUp(aircraft.Jacp)); 277 PetscCall(MatCreateDense(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,2*aircraft.nsteps,1,NULL,&aircraft.DRDP)); 278 PetscCall(MatSetUp(aircraft.DRDP)); 279 PetscCall(MatCreateDense(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,2,1,NULL,&aircraft.DRDU)); 280 PetscCall(MatSetUp(aircraft.DRDU)); 281 282 /* Create timestepping solver context */ 283 PetscCall(TSCreate(PETSC_COMM_WORLD,&aircraft.ts)); 284 PetscCall(TSSetType(aircraft.ts,TSRK)); 285 PetscCall(TSSetRHSFunction(aircraft.ts,NULL,RHSFunction,&aircraft)); 286 PetscCall(TSSetRHSJacobian(aircraft.ts,aircraft.A,aircraft.A,TSComputeRHSJacobianConstant,&aircraft)); 287 PetscCall(TSSetRHSJacobianP(aircraft.ts,aircraft.Jacp,RHSJacobianP,&aircraft)); 288 PetscCall(TSSetExactFinalTime(aircraft.ts,TS_EXACTFINALTIME_MATCHSTEP)); 289 PetscCall(TSSetEquationType(aircraft.ts,TS_EQ_ODE_EXPLICIT)); /* less Jacobian evaluations when adjoint BEuler is used, otherwise no effect */ 290 291 /* Set initial conditions */ 292 PetscCall(MatCreateVecs(aircraft.A,&aircraft.U,NULL)); 293 PetscCall(TSSetSolution(aircraft.ts,aircraft.U)); 294 PetscCall(VecGetArray(aircraft.U,&u)); 295 u[0] = 1.5; 296 u[1] = 0; 297 PetscCall(VecRestoreArray(aircraft.U,&u)); 298 PetscCall(VecCreate(PETSC_COMM_WORLD,&aircraft.V)); 299 PetscCall(VecSetSizes(aircraft.V,PETSC_DECIDE,aircraft.nsteps)); 300 PetscCall(VecSetUp(aircraft.V)); 301 PetscCall(VecDuplicate(aircraft.V,&aircraft.W)); 302 PetscCall(VecSet(aircraft.V,1.)); 303 PetscCall(VecSet(aircraft.W,PETSC_PI/4.)); 304 305 /* Save trajectory of solution so that TSAdjointSolve() may be used */ 306 PetscCall(TSSetSaveTrajectory(aircraft.ts)); 307 308 /* Set sensitivity context */ 309 PetscCall(TSCreateQuadratureTS(aircraft.ts,PETSC_FALSE,&aircraft.quadts)); 310 PetscCall(TSSetRHSFunction(aircraft.quadts,NULL,(TSRHSFunction)CostIntegrand,&aircraft)); 311 PetscCall(TSSetRHSJacobian(aircraft.quadts,aircraft.DRDU,aircraft.DRDU,(TSRHSJacobian)DRDUJacobianTranspose,&aircraft)); 312 PetscCall(TSSetRHSJacobianP(aircraft.quadts,aircraft.DRDP,(TSRHSJacobianP)DRDPJacobianTranspose,&aircraft)); 313 PetscCall(MatCreateVecs(aircraft.A,&aircraft.Lambda[0],NULL)); 314 PetscCall(MatCreateVecs(aircraft.Jacp,&aircraft.Mup[0],NULL)); 315 if (aircraft.eh) { 316 PetscCall(MatCreateVecs(aircraft.A,&aircraft.rhshp1[0],NULL)); 317 PetscCall(MatCreateVecs(aircraft.A,&aircraft.rhshp2[0],NULL)); 318 PetscCall(MatCreateVecs(aircraft.Jacp,&aircraft.rhshp3[0],NULL)); 319 PetscCall(MatCreateVecs(aircraft.Jacp,&aircraft.rhshp4[0],NULL)); 320 PetscCall(MatCreateVecs(aircraft.DRDU,&aircraft.inthp1[0],NULL)); 321 PetscCall(MatCreateVecs(aircraft.DRDU,&aircraft.inthp2[0],NULL)); 322 PetscCall(MatCreateVecs(aircraft.DRDP,&aircraft.inthp3[0],NULL)); 323 PetscCall(MatCreateVecs(aircraft.DRDP,&aircraft.inthp4[0],NULL)); 324 PetscCall(MatCreateVecs(aircraft.Jacp,&aircraft.Dir,NULL)); 325 PetscCall(TSSetRHSHessianProduct(aircraft.ts,aircraft.rhshp1,RHSHessianProductUU,aircraft.rhshp2,RHSHessianProductUP,aircraft.rhshp3,RHSHessianProductPU,aircraft.rhshp4,RHSHessianProductPP,&aircraft)); 326 PetscCall(TSSetRHSHessianProduct(aircraft.quadts,aircraft.inthp1,IntegrandHessianProductUU,aircraft.inthp2,IntegrandHessianProductUP,aircraft.inthp3,IntegrandHessianProductPU,aircraft.inthp4,IntegrandHessianProductPP,&aircraft)); 327 PetscCall(MatCreateVecs(aircraft.A,&aircraft.Lambda2[0],NULL)); 328 PetscCall(MatCreateVecs(aircraft.Jacp,&aircraft.Mup2[0],NULL)); 329 } 330 PetscCall(TSSetFromOptions(aircraft.ts)); 331 PetscCall(TSSetMaxTime(aircraft.ts,aircraft.ftime)); 332 PetscCall(TSSetTimeStep(aircraft.ts,aircraft.ftime/aircraft.nsteps)); 333 334 /* Set initial solution guess */ 335 PetscCall(MatCreateVecs(aircraft.Jacp,&P,NULL)); 336 PetscCall(VecGetArray(P,&p)); 337 for (i=0; i<aircraft.nsteps; i++) { 338 p[2*i] = 2.0; 339 p[2*i+1] = PETSC_PI/2.0; 340 } 341 PetscCall(VecRestoreArray(P,&p)); 342 PetscCall(VecDuplicate(P,&PU)); 343 PetscCall(VecDuplicate(P,&PL)); 344 PetscCall(VecGetArray(PU,&p)); 345 for (i=0; i<aircraft.nsteps; i++) { 346 p[2*i] = 2.0; 347 p[2*i+1] = PETSC_PI; 348 } 349 PetscCall(VecRestoreArray(PU,&p)); 350 PetscCall(VecGetArray(PL,&p)); 351 for (i=0; i<aircraft.nsteps; i++) { 352 p[2*i] = 0.0; 353 p[2*i+1] = -PETSC_PI; 354 } 355 PetscCall(VecRestoreArray(PL,&p)); 356 357 PetscCall(TaoSetSolution(tao,P)); 358 PetscCall(TaoSetVariableBounds(tao,PL,PU)); 359 /* Set routine for function and gradient evaluation */ 360 PetscCall(TaoSetObjectiveAndGradient(tao,NULL,FormObjFunctionGradient,(void *)&aircraft)); 361 362 if (aircraft.eh) { 363 if (aircraft.mf) { 364 PetscCall(MatCreateShell(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,2*aircraft.nsteps,2*aircraft.nsteps,(void*)&aircraft,&aircraft.H)); 365 PetscCall(MatShellSetOperation(aircraft.H,MATOP_MULT,(void(*)(void))MyMatMult)); 366 PetscCall(MatSetOption(aircraft.H,MAT_SYMMETRIC,PETSC_TRUE)); 367 PetscCall(TaoSetHessian(tao,aircraft.H,aircraft.H,MatrixFreeObjHessian,(void*)&aircraft)); 368 } else { 369 PetscCall(MatCreateDense(MPI_COMM_WORLD,PETSC_DETERMINE,PETSC_DETERMINE,2*aircraft.nsteps,2*aircraft.nsteps,NULL,&(aircraft.H))); 370 PetscCall(MatSetOption(aircraft.H,MAT_SYMMETRIC,PETSC_TRUE)); 371 PetscCall(TaoSetHessian(tao,aircraft.H,aircraft.H,FormObjHessian,(void *)&aircraft)); 372 } 373 } 374 375 /* Check for any TAO command line options */ 376 PetscCall(TaoGetKSP(tao,&ksp)); 377 if (ksp) { 378 PetscCall(KSPGetPC(ksp,&pc)); 379 PetscCall(PCSetType(pc,PCNONE)); 380 } 381 PetscCall(TaoSetFromOptions(tao)); 382 383 PetscCall(TaoSolve(tao)); 384 PetscCall(VecView(P,PETSC_VIEWER_STDOUT_WORLD)); 385 386 /* Free TAO data structures */ 387 PetscCall(TaoDestroy(&tao)); 388 389 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 390 Free work space. All PETSc objects should be destroyed when they 391 are no longer needed. 392 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 393 PetscCall(TSDestroy(&aircraft.ts)); 394 PetscCall(MatDestroy(&aircraft.A)); 395 PetscCall(VecDestroy(&aircraft.U)); 396 PetscCall(VecDestroy(&aircraft.V)); 397 PetscCall(VecDestroy(&aircraft.W)); 398 PetscCall(VecDestroy(&P)); 399 PetscCall(VecDestroy(&PU)); 400 PetscCall(VecDestroy(&PL)); 401 PetscCall(MatDestroy(&aircraft.Jacp)); 402 PetscCall(MatDestroy(&aircraft.DRDU)); 403 PetscCall(MatDestroy(&aircraft.DRDP)); 404 PetscCall(VecDestroy(&aircraft.Lambda[0])); 405 PetscCall(VecDestroy(&aircraft.Mup[0])); 406 PetscCall(VecDestroy(&P)); 407 if (aircraft.eh) { 408 PetscCall(VecDestroy(&aircraft.Lambda2[0])); 409 PetscCall(VecDestroy(&aircraft.Mup2[0])); 410 PetscCall(VecDestroy(&aircraft.Dir)); 411 PetscCall(VecDestroy(&aircraft.rhshp1[0])); 412 PetscCall(VecDestroy(&aircraft.rhshp2[0])); 413 PetscCall(VecDestroy(&aircraft.rhshp3[0])); 414 PetscCall(VecDestroy(&aircraft.rhshp4[0])); 415 PetscCall(VecDestroy(&aircraft.inthp1[0])); 416 PetscCall(VecDestroy(&aircraft.inthp2[0])); 417 PetscCall(VecDestroy(&aircraft.inthp3[0])); 418 PetscCall(VecDestroy(&aircraft.inthp4[0])); 419 PetscCall(MatDestroy(&aircraft.H)); 420 } 421 PetscCall(PetscFinalize()); 422 return 0; 423 } 424 425 /* 426 FormObjFunctionGradient - Evaluates the function and corresponding gradient. 427 428 Input Parameters: 429 tao - the Tao context 430 P - the input vector 431 ctx - optional aircraft-defined context, as set by TaoSetObjectiveAndGradient() 432 433 Output Parameters: 434 f - the newly evaluated function 435 G - the newly evaluated gradient 436 */ 437 PetscErrorCode FormObjFunctionGradient(Tao tao,Vec P,PetscReal *f,Vec G,void *ctx) 438 { 439 Aircraft actx = (Aircraft)ctx; 440 TS ts = actx->ts; 441 Vec Q; 442 const PetscScalar *p,*q; 443 PetscScalar *u,*v,*w; 444 PetscInt i; 445 446 PetscFunctionBeginUser; 447 PetscCall(VecGetArrayRead(P,&p)); 448 PetscCall(VecGetArray(actx->V,&v)); 449 PetscCall(VecGetArray(actx->W,&w)); 450 for (i=0; i<actx->nsteps; i++) { 451 v[i] = p[2*i]; 452 w[i] = p[2*i+1]; 453 } 454 PetscCall(VecRestoreArrayRead(P,&p)); 455 PetscCall(VecRestoreArray(actx->V,&v)); 456 PetscCall(VecRestoreArray(actx->W,&w)); 457 458 PetscCall(TSSetTime(ts,0.0)); 459 PetscCall(TSSetStepNumber(ts,0)); 460 PetscCall(TSSetFromOptions(ts)); 461 PetscCall(TSSetTimeStep(ts,actx->ftime/actx->nsteps)); 462 463 /* reinitialize system state */ 464 PetscCall(VecGetArray(actx->U,&u)); 465 u[0] = 2.0; 466 u[1] = 0; 467 PetscCall(VecRestoreArray(actx->U,&u)); 468 469 /* reinitialize the integral value */ 470 PetscCall(TSGetCostIntegral(ts,&Q)); 471 PetscCall(VecSet(Q,0.0)); 472 473 PetscCall(TSSolve(ts,actx->U)); 474 475 /* Reset initial conditions for the adjoint integration */ 476 PetscCall(VecSet(actx->Lambda[0],0.0)); 477 PetscCall(VecSet(actx->Mup[0],0.0)); 478 PetscCall(TSSetCostGradients(ts,1,actx->Lambda,actx->Mup)); 479 480 PetscCall(TSAdjointSolve(ts)); 481 PetscCall(VecCopy(actx->Mup[0],G)); 482 PetscCall(TSGetCostIntegral(ts,&Q)); 483 PetscCall(VecGetArrayRead(Q,&q)); 484 *f = q[0]; 485 PetscCall(VecRestoreArrayRead(Q,&q)); 486 PetscFunctionReturn(0); 487 } 488 489 PetscErrorCode FormObjHessian(Tao tao,Vec P,Mat H,Mat Hpre,void *ctx) 490 { 491 Aircraft actx = (Aircraft)ctx; 492 const PetscScalar *p; 493 PetscScalar *harr,*v,*w,one = 1.0; 494 PetscInt ind[1]; 495 PetscInt *cols,i; 496 Vec Dir; 497 498 PetscFunctionBeginUser; 499 /* set up control parameters */ 500 PetscCall(VecGetArrayRead(P,&p)); 501 PetscCall(VecGetArray(actx->V,&v)); 502 PetscCall(VecGetArray(actx->W,&w)); 503 for (i=0; i<actx->nsteps; i++) { 504 v[i] = p[2*i]; 505 w[i] = p[2*i+1]; 506 } 507 PetscCall(VecRestoreArrayRead(P,&p)); 508 PetscCall(VecRestoreArray(actx->V,&v)); 509 PetscCall(VecRestoreArray(actx->W,&w)); 510 511 PetscCall(PetscMalloc1(2*actx->nsteps,&harr)); 512 PetscCall(PetscMalloc1(2*actx->nsteps,&cols)); 513 for (i=0; i<2*actx->nsteps; i++) cols[i] = i; 514 PetscCall(VecDuplicate(P,&Dir)); 515 for (i=0; i<2*actx->nsteps; i++) { 516 ind[0] = i; 517 PetscCall(VecSet(Dir,0.0)); 518 PetscCall(VecSetValues(Dir,1,ind,&one,INSERT_VALUES)); 519 PetscCall(VecAssemblyBegin(Dir)); 520 PetscCall(VecAssemblyEnd(Dir)); 521 PetscCall(ComputeObjHessianWithSOA(Dir,harr,actx)); 522 PetscCall(MatSetValues(H,1,ind,2*actx->nsteps,cols,harr,INSERT_VALUES)); 523 PetscCall(MatAssemblyBegin(H,MAT_FINAL_ASSEMBLY)); 524 PetscCall(MatAssemblyEnd(H,MAT_FINAL_ASSEMBLY)); 525 if (H != Hpre) { 526 PetscCall(MatAssemblyBegin(Hpre,MAT_FINAL_ASSEMBLY)); 527 PetscCall(MatAssemblyEnd(Hpre,MAT_FINAL_ASSEMBLY)); 528 } 529 } 530 PetscCall(PetscFree(cols)); 531 PetscCall(PetscFree(harr)); 532 PetscCall(VecDestroy(&Dir)); 533 PetscFunctionReturn(0); 534 } 535 536 PetscErrorCode MatrixFreeObjHessian(Tao tao, Vec P, Mat H, Mat Hpre, void *ctx) 537 { 538 Aircraft actx = (Aircraft)ctx; 539 PetscScalar *v,*w; 540 const PetscScalar *p; 541 PetscInt i; 542 543 PetscFunctionBegin; 544 PetscCall(VecGetArrayRead(P,&p)); 545 PetscCall(VecGetArray(actx->V,&v)); 546 PetscCall(VecGetArray(actx->W,&w)); 547 for (i=0; i<actx->nsteps; i++) { 548 v[i] = p[2*i]; 549 w[i] = p[2*i+1]; 550 } 551 PetscCall(VecRestoreArrayRead(P,&p)); 552 PetscCall(VecRestoreArray(actx->V,&v)); 553 PetscCall(VecRestoreArray(actx->W,&w)); 554 PetscFunctionReturn(0); 555 } 556 557 PetscErrorCode MyMatMult(Mat H_shell, Vec X, Vec Y) 558 { 559 PetscScalar *y; 560 void *ptr; 561 562 PetscFunctionBegin; 563 PetscCall(MatShellGetContext(H_shell,&ptr)); 564 PetscCall(VecGetArray(Y,&y)); 565 PetscCall(ComputeObjHessianWithSOA(X,y,(Aircraft)ptr)); 566 PetscCall(VecRestoreArray(Y,&y)); 567 PetscFunctionReturn(0); 568 } 569 570 PetscErrorCode ComputeObjHessianWithSOA(Vec Dir,PetscScalar arr[],Aircraft actx) 571 { 572 TS ts = actx->ts; 573 const PetscScalar *z_ptr; 574 PetscScalar *u; 575 Vec Q; 576 PetscInt i; 577 578 PetscFunctionBeginUser; 579 /* Reset TSAdjoint so that AdjointSetUp will be called again */ 580 PetscCall(TSAdjointReset(ts)); 581 582 PetscCall(TSSetTime(ts,0.0)); 583 PetscCall(TSSetStepNumber(ts,0)); 584 PetscCall(TSSetFromOptions(ts)); 585 PetscCall(TSSetTimeStep(ts,actx->ftime/actx->nsteps)); 586 PetscCall(TSSetCostHessianProducts(actx->ts,1,actx->Lambda2,actx->Mup2,Dir)); 587 588 /* reinitialize system state */ 589 PetscCall(VecGetArray(actx->U,&u)); 590 u[0] = 2.0; 591 u[1] = 0; 592 PetscCall(VecRestoreArray(actx->U,&u)); 593 594 /* reinitialize the integral value */ 595 PetscCall(TSGetCostIntegral(ts,&Q)); 596 PetscCall(VecSet(Q,0.0)); 597 598 /* initialize tlm variable */ 599 PetscCall(MatZeroEntries(actx->Jacp)); 600 PetscCall(MatAssemblyBegin(actx->Jacp,MAT_FINAL_ASSEMBLY)); 601 PetscCall(MatAssemblyEnd(actx->Jacp,MAT_FINAL_ASSEMBLY)); 602 PetscCall(TSAdjointSetForward(ts,actx->Jacp)); 603 604 PetscCall(TSSolve(ts,actx->U)); 605 606 /* Set terminal conditions for first- and second-order adjonts */ 607 PetscCall(VecSet(actx->Lambda[0],0.0)); 608 PetscCall(VecSet(actx->Mup[0],0.0)); 609 PetscCall(VecSet(actx->Lambda2[0],0.0)); 610 PetscCall(VecSet(actx->Mup2[0],0.0)); 611 PetscCall(TSSetCostGradients(ts,1,actx->Lambda,actx->Mup)); 612 613 PetscCall(TSGetCostIntegral(ts,&Q)); 614 615 /* Reset initial conditions for the adjoint integration */ 616 PetscCall(TSAdjointSolve(ts)); 617 618 /* initial condition does not depend on p, so that lambda is not needed to assemble G */ 619 PetscCall(VecGetArrayRead(actx->Mup2[0],&z_ptr)); 620 for (i=0; i<2*actx->nsteps; i++) arr[i] = z_ptr[i]; 621 PetscCall(VecRestoreArrayRead(actx->Mup2[0],&z_ptr)); 622 623 /* Disable second-order adjoint mode */ 624 PetscCall(TSAdjointReset(ts)); 625 PetscCall(TSAdjointResetForward(ts)); 626 PetscFunctionReturn(0); 627 } 628 629 /*TEST 630 build: 631 requires: !complex !single 632 633 test: 634 args: -ts_adapt_type none -ts_type rk -ts_rk_type 3 -viewer_binary_skip_info -tao_monitor -tao_gatol 1e-7 635 636 test: 637 suffix: 2 638 args: -ts_adapt_type none -ts_type rk -ts_rk_type 3 -viewer_binary_skip_info -tao_monitor -tao_view -tao_type bntr -tao_bnk_pc_type none -exacthessian 639 640 test: 641 suffix: 3 642 args: -ts_adapt_type none -ts_type rk -ts_rk_type 3 -viewer_binary_skip_info -tao_monitor -tao_view -tao_type bntr -tao_bnk_pc_type none -exacthessian -matrixfree 643 TEST*/ 644