1 static char help[] = "Tests TSTrajectoryGetVecs. \n\n"; 2 /* 3 This example tests TSTrajectory and the ability of TSTrajectoryGetVecs 4 to reconstructs states and derivatives via interpolation (if necessary). 5 It also tests TSTrajectory{Get|Restore}UpdatedHistoryVecs 6 */ 7 #include <petscts.h> 8 9 PetscScalar func(PetscInt p, PetscReal t) { return p ? t*func(p-1,t) : 1.0; } 10 PetscScalar dfunc(PetscInt p, PetscReal t) { return p > 0 ? (PetscReal)p*func(p-1,t) : 0.0; } 11 12 int main(int argc,char **argv) 13 { 14 TS ts; 15 Vec W,W2,Wdot; 16 TSTrajectory tj; 17 PetscReal times[10], tol = PETSC_SMALL; 18 PetscReal TT[10] = { 2, 9, 1, 3, 6, 7, 5, 10, 4, 8 }; 19 PetscInt i, p = 1, Nt = 10; 20 PetscInt II[10] = { 1, 4, 9, 2, 3, 6, 5, 8, 0, 7 }; 21 PetscBool sort,use1,use2,check = PETSC_FALSE; 22 23 CHKERRQ(PetscInitialize(&argc,&argv,(char*)0,help)); 24 CHKERRQ(VecCreate(PETSC_COMM_WORLD,&W)); 25 CHKERRQ(VecSetSizes(W,1,PETSC_DECIDE)); 26 CHKERRQ(VecSetUp(W)); 27 CHKERRQ(VecDuplicate(W,&Wdot)); 28 CHKERRQ(VecDuplicate(W,&W2)); 29 CHKERRQ(TSCreate(PETSC_COMM_WORLD,&ts)); 30 CHKERRQ(TSSetSolution(ts,W2)); 31 CHKERRQ(TSSetMaxSteps(ts,10)); 32 CHKERRQ(TSSetSaveTrajectory(ts)); 33 CHKERRQ(TSGetTrajectory(ts,&tj)); 34 CHKERRQ(TSTrajectorySetType(tj,ts,TSTRAJECTORYBASIC)); 35 CHKERRQ(TSTrajectorySetFromOptions(tj,ts)); 36 CHKERRQ(TSTrajectorySetSolutionOnly(tj,PETSC_TRUE)); 37 CHKERRQ(TSTrajectorySetUp(tj,ts)); 38 CHKERRQ(PetscOptionsGetBool(NULL,NULL,"-check",&check,NULL)); 39 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-p",&p,NULL)); 40 CHKERRQ(PetscOptionsGetRealArray(NULL,NULL,"-interptimes",times,&Nt,NULL)); 41 sort = PETSC_FALSE; 42 CHKERRQ(PetscOptionsGetBool(NULL,NULL,"-sorttimes",&sort,NULL)); 43 if (sort) { 44 CHKERRQ(PetscSortReal(10,TT)); 45 } 46 sort = PETSC_FALSE; 47 CHKERRQ(PetscOptionsGetBool(NULL,NULL,"-sortkeys",&sort,NULL)); 48 if (sort) { 49 CHKERRQ(PetscSortInt(10,II)); 50 } 51 p = PetscMax(p,-p); 52 53 /* populate trajectory */ 54 for (i = 0; i < 10; i++) { 55 CHKERRQ(VecSet(W,func(p,TT[i]))); 56 CHKERRQ(TSSetStepNumber(ts,II[i])); 57 CHKERRQ(TSTrajectorySet(tj,ts,II[i],TT[i],W)); 58 } 59 for (i = 0; i < Nt; i++) { 60 PetscReal testtime = times[i], serr, derr; 61 const PetscScalar *aW,*aWdot; 62 63 CHKERRQ(TSTrajectoryGetVecs(tj,ts,PETSC_DECIDE,&testtime,W,Wdot)); 64 CHKERRQ(VecGetArrayRead(W,&aW)); 65 CHKERRQ(VecGetArrayRead(Wdot,&aWdot)); 66 CHKERRQ(PetscPrintf(PETSC_COMM_WORLD," f(%g) = %g (reconstructed %g)\n",(double)testtime,(double)PetscRealPart(func(p,testtime)),(double)PetscRealPart(aW[0]))); 67 CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"df(%g) = %g (reconstructed %g)\n",(double)testtime,(double)PetscRealPart(dfunc(p,testtime)),(double)PetscRealPart(aWdot[0]))); 68 serr = PetscAbsScalar(func(p,testtime)-aW[0]); 69 derr = PetscAbsScalar(dfunc(p,testtime)-aWdot[0]); 70 CHKERRQ(VecRestoreArrayRead(W,&aW)); 71 CHKERRQ(VecRestoreArrayRead(Wdot,&aWdot)); 72 PetscCheck(!check || serr <= tol,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error in state %g > %g",(double)serr,(double)tol); 73 PetscCheck(!check || derr <= tol,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error in state derivative %g > %g",(double)derr,(double)tol); 74 } 75 for (i = Nt-1; i >= 0; i--) { 76 PetscReal testtime = times[i], serr; 77 const PetscScalar *aW; 78 79 CHKERRQ(TSTrajectoryGetVecs(tj,ts,PETSC_DECIDE,&testtime,W,NULL)); 80 CHKERRQ(VecGetArrayRead(W,&aW)); 81 CHKERRQ(PetscPrintf(PETSC_COMM_WORLD," f(%g) = %g (reconstructed %g)\n",(double)testtime,(double)PetscRealPart(func(p,testtime)),(double)PetscRealPart(aW[0]))); 82 serr = PetscAbsScalar(func(p,testtime)-aW[0]); 83 CHKERRQ(VecRestoreArrayRead(W,&aW)); 84 PetscCheck(!check || serr <= tol,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error in state %g > %g",(double)serr,(double)tol); 85 } 86 for (i = Nt-1; i >= 0; i--) { 87 PetscReal testtime = times[i], derr; 88 const PetscScalar *aWdot; 89 90 CHKERRQ(TSTrajectoryGetVecs(tj,ts,PETSC_DECIDE,&testtime,NULL,Wdot)); 91 CHKERRQ(VecGetArrayRead(Wdot,&aWdot)); 92 CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"df(%g) = %g (reconstructed %g)\n",(double)testtime,(double)PetscRealPart(dfunc(p,testtime)),(double)PetscRealPart(aWdot[0]))); 93 derr = PetscAbsScalar(dfunc(p,testtime)-aWdot[0]); 94 CHKERRQ(VecRestoreArrayRead(Wdot,&aWdot)); 95 PetscCheck(!check || derr <= tol,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error in state derivative %g > %g",(double)derr,(double)tol); 96 } 97 for (i = 0; i < Nt; i++) { 98 PetscReal testtime = times[i], serr, derr; 99 const PetscScalar *aW,*aWdot; 100 Vec hW,hWdot; 101 102 CHKERRQ(TSTrajectoryGetUpdatedHistoryVecs(tj,ts,testtime,&hW,&hWdot)); 103 CHKERRQ(VecGetArrayRead(hW,&aW)); 104 CHKERRQ(VecGetArrayRead(hWdot,&aWdot)); 105 CHKERRQ(PetscPrintf(PETSC_COMM_WORLD," f(%g) = %g (reconstructed %g)\n",(double)testtime,(double)PetscRealPart(func(p,testtime)),(double)PetscRealPart(aW[0]))); 106 CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"df(%g) = %g (reconstructed %g)\n",(double)testtime,(double)PetscRealPart(dfunc(p,testtime)),(double)PetscRealPart(aWdot[0]))); 107 serr = PetscAbsScalar(func(p,testtime)-aW[0]); 108 derr = PetscAbsScalar(dfunc(p,testtime)-aWdot[0]); 109 CHKERRQ(VecRestoreArrayRead(hW,&aW)); 110 CHKERRQ(VecRestoreArrayRead(hWdot,&aWdot)); 111 CHKERRQ(TSTrajectoryRestoreUpdatedHistoryVecs(tj,&hW,&hWdot)); 112 PetscCheck(!check || serr <= tol,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error in state %g > %g",(double)serr,(double)tol); 113 PetscCheck(!check || derr <= tol,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error in state derivative %g > %g",(double)derr,(double)tol); 114 } 115 116 /* Test on-the-fly reconstruction */ 117 CHKERRQ(TSDestroy(&ts)); 118 CHKERRQ(TSCreate(PETSC_COMM_WORLD,&ts)); 119 CHKERRQ(TSSetSolution(ts,W2)); 120 CHKERRQ(TSSetMaxSteps(ts,10)); 121 CHKERRQ(TSSetSaveTrajectory(ts)); 122 CHKERRQ(TSGetTrajectory(ts,&tj)); 123 CHKERRQ(TSTrajectorySetType(tj,ts,TSTRAJECTORYBASIC)); 124 CHKERRQ(TSTrajectorySetFromOptions(tj,ts)); 125 CHKERRQ(TSTrajectorySetSolutionOnly(tj,PETSC_TRUE)); 126 CHKERRQ(TSTrajectorySetUp(tj,ts)); 127 use1 = PETSC_FALSE; 128 use2 = PETSC_TRUE; 129 CHKERRQ(PetscOptionsGetBool(NULL,NULL,"-use_state",&use1,NULL)); 130 CHKERRQ(PetscOptionsGetBool(NULL,NULL,"-use_der",&use2,NULL)); 131 CHKERRQ(PetscSortReal(10,TT)); 132 for (i = 0; i < 10; i++) { 133 134 CHKERRQ(TSSetStepNumber(ts,i)); 135 CHKERRQ(VecSet(W,func(p,TT[i]))); 136 CHKERRQ(TSTrajectorySet(tj,ts,i,TT[i],W)); 137 if (i) { 138 const PetscScalar *aW,*aWdot; 139 Vec hW,hWdot; 140 PetscReal testtime = TT[i], serr, derr; 141 142 CHKERRQ(TSTrajectoryGetUpdatedHistoryVecs(tj,ts,testtime,use1 ? &hW : NULL,use2 ? &hWdot : NULL)); 143 if (use1) { 144 CHKERRQ(VecGetArrayRead(hW,&aW)); 145 CHKERRQ(PetscPrintf(PETSC_COMM_WORLD," f(%g) = %g (reconstructed %g)\n",(double)testtime,(double)PetscRealPart(func(p,testtime)),(double)PetscRealPart(aW[0]))); 146 serr = PetscAbsScalar(func(p,testtime)-aW[0]); 147 CHKERRQ(VecRestoreArrayRead(hW,&aW)); 148 PetscCheck(!check || serr <= tol,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error in state %g > %g",(double)serr,(double)tol); 149 } 150 if (use2) { 151 CHKERRQ(VecGetArrayRead(hWdot,&aWdot)); 152 CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"df(%g) = %g (reconstructed %g)\n",(double)testtime,(double)PetscRealPart(dfunc(p,testtime)),(double)PetscRealPart(aWdot[0]))); 153 derr = PetscAbsScalar(dfunc(p,testtime)-aWdot[0]); 154 CHKERRQ(VecRestoreArrayRead(hWdot,&aWdot)); 155 PetscCheck(!check || i < p || derr <= tol,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error in state derivative %g > %g",(double)derr,(double)tol); 156 } 157 CHKERRQ(TSTrajectoryRestoreUpdatedHistoryVecs(tj,use1 ? &hW : NULL,use2 ? &hWdot : NULL)); 158 } 159 } 160 CHKERRQ(TSRemoveTrajectory(ts)); 161 CHKERRQ(TSDestroy(&ts)); 162 CHKERRQ(VecDestroy(&W)); 163 CHKERRQ(VecDestroy(&W2)); 164 CHKERRQ(VecDestroy(&Wdot)); 165 CHKERRQ(PetscFinalize()); 166 return 0; 167 } 168 169 /*TEST 170 171 test: 172 suffix: 1 173 requires: !single 174 args: -ts_trajectory_monitor -p 3 -ts_trajectory_reconstruction_order 3 -interptimes 1,9.9,3,1.1,1.1,5.6 -check 175 176 test: 177 suffix: 2 178 requires: !single 179 args: -sortkeys -ts_trajectory_monitor -ts_trajectory_type memory -p 3 -ts_trajectory_reconstruction_order 3 -ts_trajectory_adjointmode 0 -interptimes 1,9.9,3,1.1,1.1,5.6 -check 180 181 test: 182 suffix: 3 183 requires: !single 184 args: -ts_trajectory_monitor -p 3 -ts_trajectory_reconstruction_order 5 -interptimes 1,9.9,3,1.1,1.1,5.6 -check 185 186 TEST*/ 187