Date: 2015-10-02T22:29:51+00:00

Actual source code: dmdats.c
petsc-3.6.2 2015-10-02
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      1: #include <petscdmda.h>          /*I "petscdmda.h" I*/
      2: #include <petsc/private/dmimpl.h>
      3: #include <petsc/private/tsimpl.h>   /*I "petscts.h" I*/
      4: #include <petscdraw.h>

      6: /* This structure holds the user-provided DMDA callbacks */
      7: typedef struct {
      8:   PetscErrorCode (*ifunctionlocal)(DMDALocalInfo*,PetscReal,void*,void*,void*,void*);
      9:   PetscErrorCode (*rhsfunctionlocal)(DMDALocalInfo*,PetscReal,void*,void*,void*);
     10:   PetscErrorCode (*ijacobianlocal)(DMDALocalInfo*,PetscReal,void*,void*,PetscReal,Mat,Mat,void*);
     11:   PetscErrorCode (*rhsjacobianlocal)(DMDALocalInfo*,PetscReal,void*,Mat,Mat,void*);
     12:   void       *ifunctionlocalctx;
     13:   void       *ijacobianlocalctx;
     14:   void       *rhsfunctionlocalctx;
     15:   void       *rhsjacobianlocalctx;
     16:   InsertMode ifunctionlocalimode;
     17:   InsertMode rhsfunctionlocalimode;
     18: } DMTS_DA;

     22: static PetscErrorCode DMTSDestroy_DMDA(DMTS sdm)
     23: {

     27:   PetscFree(sdm->data);
     28:   return(0);
     29: }

     33: static PetscErrorCode DMTSDuplicate_DMDA(DMTS oldsdm,DMTS sdm)
     34: {

     38:   PetscNewLog(sdm,(DMTS_DA**)&sdm->data);
     39:   if (oldsdm->data) {PetscMemcpy(sdm->data,oldsdm->data,sizeof(DMTS_DA));}
     40:   return(0);
     41: }

     45: static PetscErrorCode DMDATSGetContext(DM dm,DMTS sdm,DMTS_DA **dmdats)
     46: {

     50:   *dmdats = NULL;
     51:   if (!sdm->data) {
     52:     PetscNewLog(dm,(DMTS_DA**)&sdm->data);
     53:     sdm->ops->destroy   = DMTSDestroy_DMDA;
     54:     sdm->ops->duplicate = DMTSDuplicate_DMDA;
     55:   }
     56:   *dmdats = (DMTS_DA*)sdm->data;
     57:   return(0);
     58: }

     62: static PetscErrorCode TSComputeIFunction_DMDA(TS ts,PetscReal ptime,Vec X,Vec Xdot,Vec F,void *ctx)
     63: {
     65:   DM             dm;
     66:   DMTS_DA        *dmdats = (DMTS_DA*)ctx;
     67:   DMDALocalInfo  info;
     68:   Vec            Xloc;
     69:   void           *x,*f,*xdot;

     75:   if (!dmdats->ifunctionlocal) SETERRQ(PetscObjectComm((PetscObject)ts),PETSC_ERR_PLIB,"Corrupt context");
     76:   TSGetDM(ts,&dm);
     77:   DMGetLocalVector(dm,&Xloc);
     78:   DMGlobalToLocalBegin(dm,X,INSERT_VALUES,Xloc);
     79:   DMGlobalToLocalEnd(dm,X,INSERT_VALUES,Xloc);
     80:   DMDAGetLocalInfo(dm,&info);
     81:   DMDAVecGetArray(dm,Xloc,&x);
     82:   DMDAVecGetArray(dm,Xdot,&xdot);
     83:   switch (dmdats->ifunctionlocalimode) {
     84:   case INSERT_VALUES: {
     85:     DMDAVecGetArray(dm,F,&f);
     86:     CHKMEMQ;
     87:     (*dmdats->ifunctionlocal)(&info,ptime,x,xdot,f,dmdats->ifunctionlocalctx);
     88:     CHKMEMQ;
     89:     DMDAVecRestoreArray(dm,F,&f);
     90:   } break;
     91:   case ADD_VALUES: {
     92:     Vec Floc;
     93:     DMGetLocalVector(dm,&Floc);
     94:     VecZeroEntries(Floc);
     95:     DMDAVecGetArray(dm,Floc,&f);
     96:     CHKMEMQ;
     97:     (*dmdats->ifunctionlocal)(&info,ptime,x,xdot,f,dmdats->ifunctionlocalctx);
     98:     CHKMEMQ;
     99:     DMDAVecRestoreArray(dm,Floc,&f);
    100:     VecZeroEntries(F);
    101:     DMLocalToGlobalBegin(dm,Floc,ADD_VALUES,F);
    102:     DMLocalToGlobalEnd(dm,Floc,ADD_VALUES,F);
    103:     DMRestoreLocalVector(dm,&Floc);
    104:   } break;
    105:   default: SETERRQ1(PetscObjectComm((PetscObject)ts),PETSC_ERR_ARG_INCOMP,"Cannot use imode=%d",(int)dmdats->ifunctionlocalimode);
    106:   }
    107:   DMDAVecRestoreArray(dm,Xloc,&x);
    108:   DMRestoreLocalVector(dm,&Xloc);
    109:   DMDAVecRestoreArray(dm,Xdot,&xdot);
    110:   return(0);
    111: }

    115: static PetscErrorCode TSComputeIJacobian_DMDA(TS ts,PetscReal ptime,Vec X,Vec Xdot,PetscReal shift,Mat A,Mat B,void *ctx)
    116: {
    118:   DM             dm;
    119:   DMTS_DA        *dmdats = (DMTS_DA*)ctx;
    120:   DMDALocalInfo  info;
    121:   Vec            Xloc;
    122:   void           *x,*xdot;

    125:   if (!dmdats->ifunctionlocal) SETERRQ(PetscObjectComm((PetscObject)ts),PETSC_ERR_PLIB,"Corrupt context");
    126:   TSGetDM(ts,&dm);

    128:   if (dmdats->ijacobianlocal) {
    129:     DMGetLocalVector(dm,&Xloc);
    130:     DMGlobalToLocalBegin(dm,X,INSERT_VALUES,Xloc);
    131:     DMGlobalToLocalEnd(dm,X,INSERT_VALUES,Xloc);
    132:     DMDAGetLocalInfo(dm,&info);
    133:     DMDAVecGetArray(dm,Xloc,&x);
    134:     DMDAVecGetArray(dm,Xdot,&xdot);
    135:     CHKMEMQ;
    136:     (*dmdats->ijacobianlocal)(&info,ptime,x,xdot,shift,A,B,dmdats->ijacobianlocalctx);
    137:     CHKMEMQ;
    138:     DMDAVecRestoreArray(dm,Xloc,&x);
    139:     DMDAVecRestoreArray(dm,Xdot,&xdot);
    140:     DMRestoreLocalVector(dm,&Xloc);
    141:   } else SETERRQ(PetscObjectComm((PetscObject)ts),PETSC_ERR_PLIB,"TSComputeIJacobian_DMDA() called without calling DMDATSSetIJacobian()");
    142:   /* This will be redundant if the user called both, but it's too common to forget. */
    143:   if (A != B) {
    144:     MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
    145:     MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
    146:   }
    147:   return(0);
    148: }

    152: static PetscErrorCode TSComputeRHSFunction_DMDA(TS ts,PetscReal ptime,Vec X,Vec F,void *ctx)
    153: {
    155:   DM             dm;
    156:   DMTS_DA        *dmdats = (DMTS_DA*)ctx;
    157:   DMDALocalInfo  info;
    158:   Vec            Xloc;
    159:   void           *x,*f;

    165:   if (!dmdats->rhsfunctionlocal) SETERRQ(PetscObjectComm((PetscObject)ts),PETSC_ERR_PLIB,"Corrupt context");
    166:   TSGetDM(ts,&dm);
    167:   DMGetLocalVector(dm,&Xloc);
    168:   DMGlobalToLocalBegin(dm,X,INSERT_VALUES,Xloc);
    169:   DMGlobalToLocalEnd(dm,X,INSERT_VALUES,Xloc);
    170:   DMDAGetLocalInfo(dm,&info);
    171:   DMDAVecGetArray(dm,Xloc,&x);
    172:   switch (dmdats->rhsfunctionlocalimode) {
    173:   case INSERT_VALUES: {
    174:     DMDAVecGetArray(dm,F,&f);
    175:     CHKMEMQ;
    176:     (*dmdats->rhsfunctionlocal)(&info,ptime,x,f,dmdats->rhsfunctionlocalctx);
    177:     CHKMEMQ;
    178:     DMDAVecRestoreArray(dm,F,&f);
    179:   } break;
    180:   case ADD_VALUES: {
    181:     Vec Floc;
    182:     DMGetLocalVector(dm,&Floc);
    183:     VecZeroEntries(Floc);
    184:     DMDAVecGetArray(dm,Floc,&f);
    185:     CHKMEMQ;
    186:     (*dmdats->rhsfunctionlocal)(&info,ptime,x,f,dmdats->rhsfunctionlocalctx);
    187:     CHKMEMQ;
    188:     DMDAVecRestoreArray(dm,Floc,&f);
    189:     VecZeroEntries(F);
    190:     DMLocalToGlobalBegin(dm,Floc,ADD_VALUES,F);
    191:     DMLocalToGlobalEnd(dm,Floc,ADD_VALUES,F);
    192:     DMRestoreLocalVector(dm,&Floc);
    193:   } break;
    194:   default: SETERRQ1(PetscObjectComm((PetscObject)ts),PETSC_ERR_ARG_INCOMP,"Cannot use imode=%d",(int)dmdats->rhsfunctionlocalimode);
    195:   }
    196:   DMDAVecRestoreArray(dm,Xloc,&x);
    197:   DMRestoreLocalVector(dm,&Xloc);
    198:   return(0);
    199: }

    203: static PetscErrorCode TSComputeRHSJacobian_DMDA(TS ts,PetscReal ptime,Vec X,Mat A,Mat B,void *ctx)
    204: {
    206:   DM             dm;
    207:   DMTS_DA        *dmdats = (DMTS_DA*)ctx;
    208:   DMDALocalInfo  info;
    209:   Vec            Xloc;
    210:   void           *x;

    213:   if (!dmdats->rhsfunctionlocal) SETERRQ(PetscObjectComm((PetscObject)ts),PETSC_ERR_PLIB,"Corrupt context");
    214:   TSGetDM(ts,&dm);

    216:   if (dmdats->rhsjacobianlocal) {
    217:     DMGetLocalVector(dm,&Xloc);
    218:     DMGlobalToLocalBegin(dm,X,INSERT_VALUES,Xloc);
    219:     DMGlobalToLocalEnd(dm,X,INSERT_VALUES,Xloc);
    220:     DMDAGetLocalInfo(dm,&info);
    221:     DMDAVecGetArray(dm,Xloc,&x);
    222:     CHKMEMQ;
    223:     (*dmdats->rhsjacobianlocal)(&info,ptime,x,A,B,dmdats->rhsjacobianlocalctx);
    224:     CHKMEMQ;
    225:     DMDAVecRestoreArray(dm,Xloc,&x);
    226:     DMRestoreLocalVector(dm,&Xloc);
    227:   } else SETERRQ(PetscObjectComm((PetscObject)ts),PETSC_ERR_PLIB,"TSComputeRHSJacobian_DMDA() called without calling DMDATSSetRHSJacobian()");
    228:   /* This will be redundant if the user called both, but it's too common to forget. */
    229:   if (A != B) {
    230:     MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
    231:     MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
    232:   }
    233:   return(0);
    234: }

    239: /*@C
    240:    DMDATSSetRHSFunctionLocal - set a local residual evaluation function

    242:    Logically Collective

    244:    Input Arguments:
    245: +  dm - DM to associate callback with
    246: .  imode - insert mode for the residual
    247: .  func - local residual evaluation
    248: -  ctx - optional context for local residual evaluation

    250:    Calling sequence for func:

    252: $ func(DMDALocalInfo info,PetscReal t,void *x,void *f,void *ctx)

    254: +  info - DMDALocalInfo defining the subdomain to evaluate the residual on
    255: .  t - time at which to evaluate residual
    256: .  x - array of local state information
    257: .  f - output array of local residual information
    258: -  ctx - optional user context

    260:    Level: beginner

    262: .seealso: DMTSSetRHSFunction(), DMDATSSetRHSJacobianLocal(), DMDASNESSetFunctionLocal()
    263: @*/
    264: PetscErrorCode DMDATSSetRHSFunctionLocal(DM dm,InsertMode imode,DMDATSRHSFunctionLocal func,void *ctx)
    265: {
    267:   DMTS           sdm;
    268:   DMTS_DA        *dmdats;

    272:   DMGetDMTSWrite(dm,&sdm);
    273:   DMDATSGetContext(dm,sdm,&dmdats);
    274:   dmdats->rhsfunctionlocalimode = imode;
    275:   dmdats->rhsfunctionlocal      = func;
    276:   dmdats->rhsfunctionlocalctx   = ctx;
    277:   DMTSSetRHSFunction(dm,TSComputeRHSFunction_DMDA,dmdats);
    278:   return(0);
    279: }

    283: /*@C
    284:    DMDATSSetRHSJacobianLocal - set a local residual evaluation function

    286:    Logically Collective

    288:    Input Arguments:
    289: +  dm    - DM to associate callback with
    290: .  func  - local RHS Jacobian evaluation routine
    291: -  ctx   - optional context for local jacobian evaluation

    293:    Calling sequence for func:

    295: $ func(DMDALocalInfo* info,PetscReal t,void* x,Mat J,Mat B,void *ctx);

    297: +  info - DMDALocalInfo defining the subdomain to evaluate the residual on
    298: .  t    - time at which to evaluate residual
    299: .  x    - array of local state information
    300: .  J    - Jacobian matrix
    301: .  B    - preconditioner matrix; often same as J
    302: -  ctx  - optional context passed above

    304:    Level: beginner

    306: .seealso: DMTSSetRHSJacobian(), DMDATSSetRHSFunctionLocal(), DMDASNESSetJacobianLocal()
    307: @*/
    308: PetscErrorCode DMDATSSetRHSJacobianLocal(DM dm,DMDATSRHSJacobianLocal func,void *ctx)
    309: {
    311:   DMTS           sdm;
    312:   DMTS_DA        *dmdats;

    316:   DMGetDMTSWrite(dm,&sdm);
    317:   DMDATSGetContext(dm,sdm,&dmdats);
    318:   dmdats->rhsjacobianlocal    = func;
    319:   dmdats->rhsjacobianlocalctx = ctx;
    320:   DMTSSetRHSJacobian(dm,TSComputeRHSJacobian_DMDA,dmdats);
    321:   return(0);
    322: }

    327: /*@C
    328:    DMDATSSetIFunctionLocal - set a local residual evaluation function

    330:    Logically Collective

    332:    Input Arguments:
    333: +  dm   - DM to associate callback with
    334: .  func - local residual evaluation
    335: -  ctx  - optional context for local residual evaluation

    337:    Calling sequence for func:
    338: +  info - DMDALocalInfo defining the subdomain to evaluate the residual on
    339: .  t    - time at which to evaluate residual
    340: .  x    - array of local state information
    341: .  xdot - array of local time derivative information
    342: .  f    - output array of local function evaluation information
    343: -  ctx - optional context passed above

    345:    Level: beginner

    347: .seealso: DMTSSetIFunction(), DMDATSSetIJacobianLocal(), DMDASNESSetFunctionLocal()
    348: @*/
    349: PetscErrorCode DMDATSSetIFunctionLocal(DM dm,InsertMode imode,DMDATSIFunctionLocal func,void *ctx)
    350: {
    352:   DMTS           sdm;
    353:   DMTS_DA        *dmdats;

    357:   DMGetDMTSWrite(dm,&sdm);
    358:   DMDATSGetContext(dm,sdm,&dmdats);
    359:   dmdats->ifunctionlocalimode = imode;
    360:   dmdats->ifunctionlocal      = func;
    361:   dmdats->ifunctionlocalctx   = ctx;
    362:   DMTSSetIFunction(dm,TSComputeIFunction_DMDA,dmdats);
    363:   return(0);
    364: }

    368: /*@C
    369:    DMDATSSetIJacobianLocal - set a local residual evaluation function

    371:    Logically Collective

    373:    Input Arguments:
    374: +  dm   - DM to associate callback with
    375: .  func - local residual evaluation
    376: -  ctx   - optional context for local residual evaluation

    378:    Calling sequence for func:

    380: $ func(DMDALocalInfo* info,PetscReal t,void* x,void *xdot,PetscScalar shift,Mat J,Mat B,void *ctx);

    382: +  info - DMDALocalInfo defining the subdomain to evaluate the residual on
    383: .  t    - time at which to evaluate the jacobian
    384: .  x    - array of local state information
    385: .  xdot - time derivative at this state
    386: .  shift - see TSSetIJacobian() for the meaning of this parameter
    387: .  J    - Jacobian matrix
    388: .  B    - preconditioner matrix; often same as J
    389: -  ctx  - optional context passed above

    391:    Level: beginner

    393: .seealso: DMTSSetJacobian(), DMDATSSetIFunctionLocal(), DMDASNESSetJacobianLocal()
    394: @*/
    395: PetscErrorCode DMDATSSetIJacobianLocal(DM dm,DMDATSIJacobianLocal func,void *ctx)
    396: {
    398:   DMTS           sdm;
    399:   DMTS_DA        *dmdats;

    403:   DMGetDMTSWrite(dm,&sdm);
    404:   DMDATSGetContext(dm,sdm,&dmdats);
    405:   dmdats->ijacobianlocal    = func;
    406:   dmdats->ijacobianlocalctx = ctx;
    407:   DMTSSetIJacobian(dm,TSComputeIJacobian_DMDA,dmdats);
    408:   return(0);
    409: }

    413: PetscErrorCode TSMonitorDMDARayDestroy(void **mctx)
    414: {
    415:   TSMonitorDMDARayCtx *rayctx = (TSMonitorDMDARayCtx *) *mctx;
    416:   PetscErrorCode       ierr;

    419:   if (rayctx->lgctx) {TSMonitorLGCtxDestroy(&rayctx->lgctx);}
    420:   VecDestroy(&rayctx->ray);
    421:   VecScatterDestroy(&rayctx->scatter);
    422:   PetscViewerDestroy(&rayctx->viewer);
    423:   PetscFree(rayctx);
    424:   return(0);
    425: }

    429: PetscErrorCode TSMonitorDMDARay(TS ts,PetscInt steps,PetscReal time,Vec u,void *mctx)
    430: {
    431:   TSMonitorDMDARayCtx *rayctx = (TSMonitorDMDARayCtx*)mctx;
    432:   Vec                 solution;
    433:   PetscErrorCode      ierr;

    436:   TSGetSolution(ts,&solution);
    437:   VecScatterBegin(rayctx->scatter,solution,rayctx->ray,INSERT_VALUES,SCATTER_FORWARD);
    438:   VecScatterEnd(rayctx->scatter,solution,rayctx->ray,INSERT_VALUES,SCATTER_FORWARD);
    439:   if (rayctx->viewer) {
    440:     VecView(rayctx->ray,rayctx->viewer);
    441:   }
    442:   return(0);
    443: }

    447: PetscErrorCode  TSMonitorLGDMDARay(TS ts, PetscInt step, PetscReal ptime, Vec u, void *ctx)
    448: {
    449:   TSMonitorDMDARayCtx *rayctx = (TSMonitorDMDARayCtx *) ctx;
    450:   TSMonitorLGCtx       lgctx  = (TSMonitorLGCtx) rayctx->lgctx;
    451:   Vec                  v      = rayctx->ray;
    452:   const PetscScalar   *a;
    453:   PetscInt             dim;
    454:   PetscErrorCode       ierr;

    457:   VecScatterBegin(rayctx->scatter, u, v, INSERT_VALUES, SCATTER_FORWARD);
    458:   VecScatterEnd(rayctx->scatter, u, v, INSERT_VALUES, SCATTER_FORWARD);
    459:   if (!step) {
    460:     PetscDrawAxis axis;

    462:     PetscDrawLGGetAxis(lgctx->lg, &axis);
    463:     PetscDrawAxisSetLabels(axis, "Solution Ray as function of time", "Time", "Solution");
    464:     VecGetLocalSize(rayctx->ray, &dim);
    465:     PetscDrawLGSetDimension(lgctx->lg, dim);
    466:     PetscDrawLGReset(lgctx->lg);
    467:   }
    468:   VecGetArrayRead(v, &a);
    469: #if defined(PETSC_USE_COMPLEX)
    470:   {
    471:     PetscReal *areal;
    472:     PetscInt   i,n;
    473:     VecGetLocalSize(v, &n);
    474:     PetscMalloc1(n, &areal);
    475:     for (i = 0; i < n; ++i) areal[i] = PetscRealPart(a[i]);
    476:     PetscDrawLGAddCommonPoint(lgctx->lg, ptime, areal);
    477:     PetscFree(areal);
    478:   }
    479: #else
    480:   PetscDrawLGAddCommonPoint(lgctx->lg, ptime, a);
    481: #endif
    482:   VecRestoreArrayRead(v, &a);
    483:   if (((lgctx->howoften > 0) && (!(step % lgctx->howoften))) || ((lgctx->howoften == -1) && ts->reason)) {
    484:     PetscDrawLGDraw(lgctx->lg);
    485:   }
    486:   return(0);
    487: }