Actual source code: pipes1.c
petsc-3.15.0 2021-03-30
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      1: static char help[] = "This example demonstrates DMNetwork. It is used for testing parallel generation of dmnetwork, then redistribute. \n\\n";
      2: /*
      3:   Example: mpiexec -n <np> ./pipes1 -ts_max_steps 10
      4: */

      6: #include "wash.h"
      7: #include <petscdmplex.h>

      9: /*
     10:   WashNetworkDistribute - proc[0] distributes sequential wash object
     11:    Input Parameters:
     12: .  comm - MPI communicator
     13: .  wash - wash context with all network data in proc[0]

     15:    Output Parameter:
     16: .  wash - wash context with nedge, nvertex and edgelist distributed

     18:    Note: The routine is used for testing parallel generation of dmnetwork, then redistribute.
     19: */
     20: PetscErrorCode WashNetworkDistribute(MPI_Comm comm,Wash wash)
     21: {
     23:   PetscMPIInt    rank,size,tag=0;
     24:   PetscInt       i,e,v,numEdges,numVertices,nedges,*eowners=NULL,estart,eend,*vtype=NULL,nvertices;
     25:   PetscInt       *edgelist = wash->edgelist,*nvtx=NULL,*vtxDone=NULL;

     28:   MPI_Comm_size(comm,&size);
     29:   if (size == 1) return(0);

     31:   MPI_Comm_rank(comm,&rank);
     32:   numEdges    = wash->nedge;
     33:   numVertices = wash->nvertex;

     35:   /* (1) all processes get global and local number of edges */
     36:   MPI_Bcast(&numEdges,1,MPIU_INT,0,comm);
     37:   nedges = numEdges/size; /* local nedges */
     38:   if (!rank) {
     39:     nedges += numEdges - size*(numEdges/size);
     40:   }
     41:   wash->Nedge = numEdges;
     42:   wash->nedge = nedges;
     43:   /* PetscPrintf(PETSC_COMM_SELF,"[%d] nedges %d, numEdges %d\n",rank,nedges,numEdges); */

     45:   PetscCalloc3(size+1,&eowners,size,&nvtx,numVertices,&vtxDone);
     46:   MPI_Allgather(&nedges,1,MPIU_INT,eowners+1,1,MPIU_INT,PETSC_COMM_WORLD);
     47:   eowners[0] = 0;
     48:   for (i=2; i<=size; i++) {
     49:     eowners[i] += eowners[i-1];
     50:   }

     52:   estart = eowners[rank];
     53:   eend   = eowners[rank+1];
     54:   /* PetscPrintf(PETSC_COMM_SELF,"[%d] own lists row %d - %d\n",rank,estart,eend); */

     56:   /* (2) distribute row block edgelist to all processors */
     57:   if (!rank) {
     58:     vtype = wash->vtype;
     59:     for (i=1; i<size; i++) {
     60:       /* proc[0] sends edgelist to proc[i] */
     61:       MPI_Send(edgelist+2*eowners[i],2*(eowners[i+1]-eowners[i]),MPIU_INT,i,tag,comm);

     63:       /* proc[0] sends vtype to proc[i] */
     64:       MPI_Send(vtype+2*eowners[i],2*(eowners[i+1]-eowners[i]),MPIU_INT,i,tag,comm);
     65:     }
     66:   } else {
     67:     MPI_Status      status;
     68:     PetscMalloc1(2*(eend-estart),&vtype);
     69:     PetscMalloc1(2*(eend-estart),&edgelist);

     71:     MPI_Recv(edgelist,2*(eend-estart),MPIU_INT,0,tag,comm,&status);
     72:     MPI_Recv(vtype,2*(eend-estart),MPIU_INT,0,tag,comm,&status);
     73:   }

     75:   wash->edgelist = edgelist;

     77:   /* (3) all processes get global and local number of vertices, without ghost vertices */
     78:   if (!rank) {
     79:     for (i=0; i<size; i++) {
     80:       for (e=eowners[i]; e<eowners[i+1]; e++) {
     81:         v = edgelist[2*e];
     82:         if (!vtxDone[v]) {
     83:           nvtx[i]++; vtxDone[v] = 1;
     84:         }
     85:         v = edgelist[2*e+1];
     86:         if (!vtxDone[v]) {
     87:           nvtx[i]++; vtxDone[v] = 1;
     88:         }
     89:       }
     90:     }
     91:   }
     92:   MPI_Bcast(&numVertices,1,MPIU_INT,0,PETSC_COMM_WORLD);
     93:   MPI_Scatter(nvtx,1,MPIU_INT,&nvertices,1,MPIU_INT,0,PETSC_COMM_WORLD);
     94:   PetscFree3(eowners,nvtx,vtxDone);

     96:   wash->Nvertex = numVertices;
     97:   wash->nvertex = nvertices;
     98:   wash->vtype   = vtype;
     99:   return(0);
    100: }

    102: PetscErrorCode WASHIFunction(TS ts,PetscReal t,Vec X,Vec Xdot,Vec F,void* ctx)
    103: {
    105:   Wash           wash=(Wash)ctx;
    106:   DM             networkdm;
    107:   Vec            localX,localXdot,localF, localXold;
    108:   const PetscInt *cone;
    109:   PetscInt       vfrom,vto,offsetfrom,offsetto,varoffset;
    110:   PetscInt       v,vStart,vEnd,e,eStart,eEnd;
    111:   PetscInt       nend,type;
    112:   PetscBool      ghost;
    113:   PetscScalar    *farr,*juncf, *pipef;
    114:   PetscReal      dt;
    115:   Pipe           pipe;
    116:   PipeField      *pipex,*pipexdot,*juncx;
    117:   Junction       junction;
    118:   DMDALocalInfo  info;
    119:   const PetscScalar *xarr,*xdotarr, *xoldarr;

    122:   localX    = wash->localX;
    123:   localXdot = wash->localXdot;

    125:   TSGetSolution(ts,&localXold);
    126:   TSGetDM(ts,&networkdm);
    127:   TSGetTimeStep(ts,&dt);
    128:   DMGetLocalVector(networkdm,&localF);

    130:   /* Set F and localF as zero */
    131:   VecSet(F,0.0);
    132:   VecSet(localF,0.0);

    134:   /* Update ghost values of locaX and locaXdot */
    135:   DMGlobalToLocalBegin(networkdm,X,INSERT_VALUES,localX);
    136:   DMGlobalToLocalEnd(networkdm,X,INSERT_VALUES,localX);

    138:   DMGlobalToLocalBegin(networkdm,Xdot,INSERT_VALUES,localXdot);
    139:   DMGlobalToLocalEnd(networkdm,Xdot,INSERT_VALUES,localXdot);

    141:   VecGetArrayRead(localX,&xarr);
    142:   VecGetArrayRead(localXdot,&xdotarr);
    143:   VecGetArrayRead(localXold,&xoldarr);
    144:   VecGetArray(localF,&farr);

    146:    /* junction->type == JUNCTION:
    147:            juncf[0] = -qJ + sum(qin); juncf[1] = qJ - sum(qout)
    148:        junction->type == RESERVOIR (upper stream):
    149:            juncf[0] = -hJ + H0; juncf[1] = qJ - sum(qout)
    150:        junction->type == VALVE (down stream):
    151:            juncf[0] =  -qJ + sum(qin); juncf[1] = qJ
    152:   */
    153:   /* Vertex/junction initialization */
    154:   DMNetworkGetVertexRange(networkdm,&vStart,&vEnd);
    155:   for (v=vStart; v<vEnd; v++) {
    156:     DMNetworkIsGhostVertex(networkdm,v,&ghost);
    157:     if (ghost) continue;

    159:     DMNetworkGetComponent(networkdm,v,0,&type,(void**)&junction,NULL);
    160:     DMNetworkGetLocalVecOffset(networkdm,v,ALL_COMPONENTS,&varoffset);
    161:     juncx      = (PipeField*)(xarr + varoffset);
    162:     juncf      = (PetscScalar*)(farr + varoffset);

    164:     juncf[0] = -juncx[0].q;
    165:     juncf[1] =  juncx[0].q;

    167:     if (junction->type == RESERVOIR) { /* upstream reservoir */
    168:       juncf[0] = juncx[0].h - wash->H0;
    169:     }
    170:   }

    172:   /* Edge/pipe */
    173:   DMNetworkGetEdgeRange(networkdm,&eStart,&eEnd);
    174:   for (e=eStart; e<eEnd; e++) {
    175:     DMNetworkGetComponent(networkdm,e,0,&type,(void**)&pipe,NULL);
    176:     DMNetworkGetLocalVecOffset(networkdm,e,ALL_COMPONENTS,&varoffset);
    177:     pipex    = (PipeField*)(xarr + varoffset);
    178:     pipexdot = (PipeField*)(xdotarr + varoffset);
    179:     pipef    = (PetscScalar*)(farr + varoffset);

    181:     /* Get some data into the pipe structure: note, some of these operations
    182:      * might be redundant. Will it consume too much time? */
    183:     pipe->dt   = dt;
    184:     pipe->xold = (PipeField*)(xoldarr + varoffset);

    186:     /* Evaluate F over this edge/pipe: pipef[1], ...,pipef[2*nend] */
    187:     DMDAGetLocalInfo(pipe->da,&info);
    188:     PipeIFunctionLocal_Lax(&info,t,pipex,pipexdot,pipef,pipe);

    190:     /* Get boundary values from connected vertices */
    191:     DMNetworkGetConnectedVertices(networkdm,e,&cone);
    192:     vfrom = cone[0]; /* local ordering */
    193:     vto   = cone[1];
    194:     DMNetworkGetLocalVecOffset(networkdm,vfrom,ALL_COMPONENTS,&offsetfrom);
    195:     DMNetworkGetLocalVecOffset(networkdm,vto,ALL_COMPONENTS,&offsetto);

    197:     /* Evaluate upstream boundary */
    198:     DMNetworkGetComponent(networkdm,vfrom,0,&type,(void**)&junction,NULL);
    199:     if (junction->type != JUNCTION && junction->type != RESERVOIR) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"junction type is not supported");
    200:     juncx = (PipeField*)(xarr + offsetfrom);
    201:     juncf = (PetscScalar*)(farr + offsetfrom);

    203:     pipef[0] = pipex[0].h - juncx[0].h;
    204:     juncf[1] -= pipex[0].q;

    206:     /* Evaluate downstream boundary */
    207:     DMNetworkGetComponent(networkdm,vto,0,&type,(void**)&junction,NULL);
    208:     if (junction->type != JUNCTION && junction->type != VALVE) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"junction type is not supported");
    209:     juncx = (PipeField*)(xarr + offsetto);
    210:     juncf = (PetscScalar*)(farr + offsetto);
    211:     nend  = pipe->nnodes - 1;

    213:     pipef[2*nend + 1] = pipex[nend].h - juncx[0].h;
    214:     juncf[0] += pipex[nend].q;
    215:   }

    217:   VecRestoreArrayRead(localX,&xarr);
    218:   VecRestoreArrayRead(localXdot,&xdotarr);
    219:   VecRestoreArray(localF,&farr);

    221:   DMLocalToGlobalBegin(networkdm,localF,ADD_VALUES,F);
    222:   DMLocalToGlobalEnd(networkdm,localF,ADD_VALUES,F);
    223:   DMRestoreLocalVector(networkdm,&localF);
    224:   /*
    225:    PetscPrintf(PETSC_COMM_WORLD("F:\n");
    226:    VecView(F,PETSC_VIEWER_STDOUT_WORLD);
    227:    */
    228:   return(0);
    229: }

    231: PetscErrorCode WASHSetInitialSolution(DM networkdm,Vec X,Wash wash)
    232: {
    234:   PetscInt       k,nx,vkey,vfrom,vto,offsetfrom,offsetto;
    235:   PetscInt       type,varoffset;
    236:   PetscInt       e,eStart,eEnd;
    237:   Vec            localX;
    238:   PetscScalar    *xarr;
    239:   Pipe           pipe;
    240:   Junction       junction;
    241:   const PetscInt *cone;
    242:   const PetscScalar *xarray;

    245:   VecSet(X,0.0);
    246:   DMGetLocalVector(networkdm,&localX);
    247:   VecGetArray(localX,&xarr);

    249:   /* Edge */
    250:   DMNetworkGetEdgeRange(networkdm,&eStart,&eEnd);
    251:   for (e=eStart; e<eEnd; e++) {
    252:     DMNetworkGetLocalVecOffset(networkdm,e,ALL_COMPONENTS,&varoffset);
    253:     DMNetworkGetComponent(networkdm,e,0,&type,(void**)&pipe,NULL);

    255:     /* set initial values for this pipe */
    256:     PipeComputeSteadyState(pipe,wash->Q0,wash->H0);
    257:     VecGetSize(pipe->x,&nx);

    259:     VecGetArrayRead(pipe->x,&xarray);
    260:     /* copy pipe->x to xarray */
    261:     for (k=0; k<nx; k++) {
    262:       (xarr+varoffset)[k] = xarray[k];
    263:     }

    265:     /* set boundary values into vfrom and vto */
    266:     DMNetworkGetConnectedVertices(networkdm,e,&cone);
    267:     vfrom = cone[0]; /* local ordering */
    268:     vto   = cone[1];
    269:     DMNetworkGetLocalVecOffset(networkdm,vfrom,ALL_COMPONENTS,&offsetfrom);
    270:     DMNetworkGetLocalVecOffset(networkdm,vto,ALL_COMPONENTS,&offsetto);

    272:     /* if vform is a head vertex: */
    273:     DMNetworkGetComponent(networkdm,vfrom,0,&vkey,(void**)&junction,NULL);
    274:     if (junction->type == RESERVOIR) {
    275:       (xarr+offsetfrom)[1] = wash->H0; /* 1st H */
    276:     }

    278:     /* if vto is an end vertex: */
    279:     DMNetworkGetComponent(networkdm,vto,0,&vkey,(void**)&junction,NULL);
    280:     if (junction->type == VALVE) {
    281:       (xarr+offsetto)[0] = wash->QL; /* last Q */
    282:     }
    283:     VecRestoreArrayRead(pipe->x,&xarray);
    284:   }

    286:   VecRestoreArray(localX,&xarr);
    287:   DMLocalToGlobalBegin(networkdm,localX,ADD_VALUES,X);
    288:   DMLocalToGlobalEnd(networkdm,localX,ADD_VALUES,X);
    289:   DMRestoreLocalVector(networkdm,&localX);

    291: #if 0
    292:   PetscInt N;
    293:   VecGetSize(X,&N);
    294:   PetscPrintf(PETSC_COMM_WORLD,"initial solution %d:\n",N);
    295:   VecView(X,PETSC_VIEWER_STDOUT_WORLD);
    296: #endif
    297:   return(0);
    298: }

    300: PetscErrorCode TSDMNetworkMonitor(TS ts, PetscInt step, PetscReal t, Vec x, void *context)
    301: {
    302:   PetscErrorCode     ierr;
    303:   DMNetworkMonitor   monitor;

    306:   monitor = (DMNetworkMonitor)context;
    307:   DMNetworkMonitorView(monitor,x);
    308:   return(0);
    309: }

    311: PetscErrorCode PipesView(Vec X,DM networkdm,Wash wash)
    312: {
    313:   PetscErrorCode       ierr;
    314:   Pipe                 pipe;
    315:   PetscInt             key,Start,End;
    316:   PetscMPIInt          rank;
    317:   PetscInt             nx,nnodes,nidx,*idx1,*idx2,*idx1_h,*idx2_h,idx_start,i,k,k1,xstart,j1;
    318:   Vec                  Xq,Xh,localX;
    319:   IS                   is1_q,is2_q,is1_h,is2_h;
    320:   VecScatter           ctx_q,ctx_h;

    323:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);

    325:   /* get number of local and global total nnodes */
    326:   nidx = wash->nnodes_loc;
    327:   MPIU_Allreduce(&nidx,&nx,1,MPIU_INT,MPI_SUM,PETSC_COMM_WORLD);

    329:   VecCreate(PETSC_COMM_WORLD,&Xq);
    330:   if (rank == 0) { /* all entries of Xq are in proc[0] */
    331:     VecSetSizes(Xq,nx,PETSC_DECIDE);
    332:   } else {
    333:     VecSetSizes(Xq,0,PETSC_DECIDE);
    334:   }
    335:   VecSetFromOptions(Xq);
    336:   VecSet(Xq,0.0);
    337:   VecDuplicate(Xq,&Xh);

    339:   DMGetLocalVector(networkdm,&localX);

    341:   /* set idx1 and idx2 */
    342:   PetscCalloc4(nidx,&idx1,nidx,&idx2,nidx,&idx1_h,nidx,&idx2_h);

    344:   DMNetworkGetEdgeRange(networkdm,&Start, &End);

    346:   VecGetOwnershipRange(X,&xstart,NULL);
    347:   k1 = 0;
    348:   j1 = 0;
    349:   for (i = Start; i < End; i++) {
    350:     DMNetworkGetComponent(networkdm,i,0,&key,(void**)&pipe,NULL);
    351:     nnodes = pipe->nnodes;
    352:     idx_start = pipe->id*nnodes;
    353:     for (k=0; k<nnodes; k++) {
    354:       idx1[k1] = xstart + j1*2*nnodes + 2*k;
    355:       idx2[k1] = idx_start + k;

    357:       idx1_h[k1] = xstart + j1*2*nnodes + 2*k + 1;
    358:       idx2_h[k1] = idx_start + k;
    359:       k1++;
    360:     }
    361:     j1++;
    362:   }

    364:   ISCreateGeneral(PETSC_COMM_SELF,nidx,idx1,PETSC_COPY_VALUES,&is1_q);
    365:   ISCreateGeneral(PETSC_COMM_SELF,nidx,idx2,PETSC_COPY_VALUES,&is2_q);
    366:   VecScatterCreate(X,is1_q,Xq,is2_q,&ctx_q);
    367:   VecScatterBegin(ctx_q,X,Xq,INSERT_VALUES,SCATTER_FORWARD);
    368:   VecScatterEnd(ctx_q,X,Xq,INSERT_VALUES,SCATTER_FORWARD);

    370:   ISCreateGeneral(PETSC_COMM_SELF,nidx,idx1_h,PETSC_COPY_VALUES,&is1_h);
    371:   ISCreateGeneral(PETSC_COMM_SELF,nidx,idx2_h,PETSC_COPY_VALUES,&is2_h);
    372:   VecScatterCreate(X,is1_h,Xh,is2_h,&ctx_h);
    373:   VecScatterBegin(ctx_h,X,Xh,INSERT_VALUES,SCATTER_FORWARD);
    374:   VecScatterEnd(ctx_h,X,Xh,INSERT_VALUES,SCATTER_FORWARD);

    376:   PetscPrintf(PETSC_COMM_WORLD,"Xq: \n");
    377:   VecView(Xq,PETSC_VIEWER_STDOUT_WORLD);
    378:   PetscPrintf(PETSC_COMM_WORLD,"Xh: \n");
    379:   VecView(Xh,PETSC_VIEWER_STDOUT_WORLD);

    381:   VecScatterDestroy(&ctx_q);
    382:   PetscFree4(idx1,idx2,idx1_h,idx2_h);
    383:   ISDestroy(&is1_q);
    384:   ISDestroy(&is2_q);

    386:   VecScatterDestroy(&ctx_h);
    387:   ISDestroy(&is1_h);
    388:   ISDestroy(&is2_h);

    390:   VecDestroy(&Xq);
    391:   VecDestroy(&Xh);
    392:   DMRestoreLocalVector(networkdm,&localX);
    393:   return(0);
    394: }

    396: PetscErrorCode WashNetworkCleanUp(Wash wash)
    397: {
    399:   PetscMPIInt    rank;

    402:   MPI_Comm_rank(wash->comm,&rank);
    403:   PetscFree(wash->edgelist);
    404:   PetscFree(wash->vtype);
    405:   if (!rank) {
    406:     PetscFree2(wash->junction,wash->pipe);
    407:   }
    408:   return(0);
    409: }

    411: PetscErrorCode WashNetworkCreate(MPI_Comm comm,PetscInt pipesCase,Wash *wash_ptr)
    412: {
    414:   PetscInt       npipes;
    415:   PetscMPIInt    rank;
    416:   Wash           wash=NULL;
    417:   PetscInt       i,numVertices,numEdges,*vtype;
    418:   PetscInt       *edgelist;
    419:   Junction       junctions=NULL;
    420:   Pipe           pipes=NULL;
    421:   PetscBool      washdist=PETSC_TRUE;

    424:   MPI_Comm_rank(comm,&rank);

    426:   PetscCalloc1(1,&wash);
    427:   wash->comm = comm;
    428:   *wash_ptr  = wash;
    429:   wash->Q0   = 0.477432; /* RESERVOIR */
    430:   wash->H0   = 150.0;
    431:   wash->HL   = 143.488;  /* VALVE */
    432:   wash->QL   = 0.0;
    433:   wash->nnodes_loc = 0;

    435:   numVertices = 0;
    436:   numEdges    = 0;
    437:   edgelist    = NULL;

    439:   /* proc[0] creates a sequential wash and edgelist */
    440:   PetscPrintf(PETSC_COMM_WORLD,"Setup pipesCase %D\n",pipesCase);

    442:   /* Set global number of pipes, edges, and junctions */
    443:   /*-------------------------------------------------*/
    444:   switch (pipesCase) {
    445:   case 0:
    446:     /* pipeCase 0: */
    447:     /* =================================================
    448:     (RESERVOIR) v0 --E0--> v1--E1--> v2 --E2-->v3 (VALVE)
    449:     ====================================================  */
    450:     npipes = 3;
    451:     PetscOptionsGetInt(NULL,NULL, "-npipes", &npipes, NULL);
    452:     wash->nedge   = npipes;
    453:     wash->nvertex = npipes + 1;

    455:     /* Set local edges and vertices -- proc[0] sets entire network, then distributes */
    456:     numVertices = 0;
    457:     numEdges    = 0;
    458:     edgelist    = NULL;
    459:     if (!rank) {
    460:       numVertices = wash->nvertex;
    461:       numEdges    = wash->nedge;

    463:       PetscCalloc1(2*numEdges,&edgelist);
    464:       for (i=0; i<numEdges; i++) {
    465:         edgelist[2*i] = i; edgelist[2*i+1] = i+1;
    466:       }

    468:       /* Add network components */
    469:       /*------------------------*/
    470:       PetscCalloc2(numVertices,&junctions,numEdges,&pipes);

    472:       /* vertex */
    473:       for (i=0; i<numVertices; i++) {
    474:         junctions[i].id = i;
    475:         junctions[i].type = JUNCTION;
    476:       }

    478:       junctions[0].type             = RESERVOIR;
    479:       junctions[numVertices-1].type = VALVE;
    480:     }
    481:     break;
    482:   case 1:
    483:     /* pipeCase 1: */
    484:     /* ==========================
    485:                 v2 (VALVE)
    486:                 ^
    487:                 |
    488:                E2
    489:                 |
    490:     v0 --E0--> v3--E1--> v1
    491:   (RESERVOIR)            (RESERVOIR)
    492:     =============================  */
    493:     npipes = 3;
    494:     wash->nedge   = npipes;
    495:     wash->nvertex = npipes + 1;

    497:     /* Set local edges and vertices -- proc[0] sets entire network, then distributes */
    498:     if (!rank) {
    499:       numVertices = wash->nvertex;
    500:       numEdges    = wash->nedge;

    502:       PetscCalloc1(2*numEdges,&edgelist);
    503:       edgelist[0] = 0; edgelist[1] = 3;  /* edge[0] */
    504:       edgelist[2] = 3; edgelist[3] = 1;  /* edge[1] */
    505:       edgelist[4] = 3; edgelist[5] = 2;  /* edge[2] */

    507:       /* Add network components */
    508:       /*------------------------*/
    509:       PetscCalloc2(numVertices,&junctions,numEdges,&pipes);
    510:       /* vertex */
    511:       for (i=0; i<numVertices; i++) {
    512:         junctions[i].id   = i;
    513:         junctions[i].type = JUNCTION;
    514:       }

    516:       junctions[0].type = RESERVOIR;
    517:       junctions[1].type = VALVE;
    518:       junctions[2].type = VALVE;
    519:     }
    520:     break;
    521:   case 2:
    522:     /* pipeCase 2: */
    523:     /* ==========================
    524:     (RESERVOIR)  v2--> E2
    525:                        |
    526:             v0 --E0--> v3--E1--> v1
    527:     (RESERVOIR)               (VALVE)
    528:     =============================  */

    530:     /* Set application parameters -- to be used in function evalutions */
    531:     npipes = 3;
    532:     wash->nedge   = npipes;
    533:     wash->nvertex = npipes + 1;

    535:     /* Set local edges and vertices -- proc[0] sets entire network, then distributes */
    536:     if (!rank) {
    537:       numVertices = wash->nvertex;
    538:       numEdges    = wash->nedge;

    540:       PetscCalloc1(2*numEdges,&edgelist);
    541:       edgelist[0] = 0; edgelist[1] = 3;  /* edge[0] */
    542:       edgelist[2] = 3; edgelist[3] = 1;  /* edge[1] */
    543:       edgelist[4] = 2; edgelist[5] = 3;  /* edge[2] */

    545:       /* Add network components */
    546:       /*------------------------*/
    547:       PetscCalloc2(numVertices,&junctions,numEdges,&pipes);
    548:       /* vertex */
    549:       for (i=0; i<numVertices; i++) {
    550:         junctions[i].id = i;
    551:         junctions[i].type = JUNCTION;
    552:       }

    554:       junctions[0].type = RESERVOIR;
    555:       junctions[1].type = VALVE;
    556:       junctions[2].type = RESERVOIR;
    557:     }
    558:     break;
    559:   default:
    560:     SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONG,"not done yet");
    561:   }

    563:   /* set edge global id */
    564:   for (i=0; i<numEdges; i++) pipes[i].id = i;

    566:   if (!rank) { /* set vtype for proc[0] */
    567:     PetscInt v;
    568:     PetscMalloc1(2*numEdges,&vtype);
    569:     for (i=0; i<2*numEdges; i++) {
    570:       v        = edgelist[i];
    571:       vtype[i] = junctions[v].type;
    572:     }
    573:     wash->vtype = vtype;
    574:   }

    576:   *wash_ptr      = wash;
    577:   wash->nedge    = numEdges;
    578:   wash->nvertex  = numVertices;
    579:   wash->edgelist = edgelist;
    580:   wash->junction = junctions;
    581:   wash->pipe     = pipes;

    583:   /* Distribute edgelist to other processors */
    584:   PetscOptionsGetBool(NULL,NULL,"-wash_distribute",&washdist,NULL);
    585:   if (washdist) {
    586:     /*
    587:      PetscPrintf(PETSC_COMM_WORLD," Distribute sequential wash ...\n");
    588:      */
    589:     WashNetworkDistribute(comm,wash);
    590:   }
    591:   return(0);
    592: }

    594: /* ------------------------------------------------------- */
    595: int main(int argc,char ** argv)
    596: {
    597:   PetscErrorCode    ierr;
    598:   Wash              wash;
    599:   Junction          junctions,junction;
    600:   Pipe              pipe,pipes;
    601:   PetscInt          KeyPipe,KeyJunction;
    602:   PetscInt          *edgelist = NULL,*vtype = NULL;
    603:   PetscInt          i,e,v,eStart,eEnd,vStart,vEnd,key;
    604:   PetscInt          vkey,type;
    605:   const PetscInt    *cone;
    606:   DM                networkdm;
    607:   PetscMPIInt       size,rank;
    608:   PetscReal         ftime;
    609:   Vec               X;
    610:   TS                ts;
    611:   PetscInt          steps=1;
    612:   TSConvergedReason reason;
    613:   PetscBool         viewpipes,monipipes=PETSC_FALSE,userJac=PETSC_TRUE,viewdm=PETSC_FALSE,viewX=PETSC_FALSE;
    614:   PetscInt          pipesCase=0;
    615:   DMNetworkMonitor  monitor;
    616:   MPI_Comm          comm;

    618:   PetscInt          nedges,nvertices; /* local number of edges and vertices */
    619:   PetscInt          nnodes = 6;

    621:   PetscInitialize(&argc,&argv,"pOption",help);if (ierr) return ierr;

    623:   /* Read runtime options */
    624:   PetscOptionsGetInt(NULL,NULL, "-case", &pipesCase, NULL);
    625:   PetscOptionsGetBool(NULL,NULL,"-user_Jac",&userJac,NULL);
    626:   PetscOptionsGetBool(NULL,NULL,"-pipe_monitor",&monipipes,NULL);
    627:   PetscOptionsGetBool(NULL,NULL,"-viewdm",&viewdm,NULL);
    628:   PetscOptionsGetBool(NULL,NULL,"-viewX",&viewX,NULL);
    629:   PetscOptionsGetInt(NULL,NULL, "-npipenodes", &nnodes, NULL);

    631:   /* Create networkdm */
    632:   /*------------------*/
    633:   DMNetworkCreate(PETSC_COMM_WORLD,&networkdm);
    634:   PetscObjectGetComm((PetscObject)networkdm,&comm);
    635:   MPI_Comm_rank(comm,&rank);
    636:   MPI_Comm_size(comm,&size);

    638:   if (size == 1 && monipipes) {
    639:     DMNetworkMonitorCreate(networkdm,&monitor);
    640:   }

    642:   /* Register the components in the network */
    643:   DMNetworkRegisterComponent(networkdm,"junctionstruct",sizeof(struct _p_Junction),&KeyJunction);
    644:   DMNetworkRegisterComponent(networkdm,"pipestruct",sizeof(struct _p_Pipe),&KeyPipe);

    646:   /* Create a distributed wash network (user-specific) */
    647:   WashNetworkCreate(comm,pipesCase,&wash);
    648:   nedges      = wash->nedge;
    649:   nvertices   = wash->nvertex; /* local number of vertices, excluding ghosts */
    650:   edgelist    = wash->edgelist;
    651:   vtype       = wash->vtype;
    652:   junctions   = wash->junction;
    653:   pipes       = wash->pipe;

    655:   /* Set up the network layout */
    656:   DMNetworkSetNumSubNetworks(networkdm,PETSC_DECIDE,1);
    657:   DMNetworkAddSubnetwork(networkdm,NULL,nvertices,nedges,edgelist,NULL);

    659:   DMNetworkLayoutSetUp(networkdm);

    661:   DMNetworkGetEdgeRange(networkdm,&eStart,&eEnd);
    662:   DMNetworkGetVertexRange(networkdm,&vStart,&vEnd);
    663:   /* PetscPrintf(PETSC_COMM_SELF,"[%d] eStart/End: %d - %d; vStart/End: %d - %d\n",rank,eStart,eEnd,vStart,vEnd); */

    665:   if (rank) { /* junctions[] and pipes[] for proc[0] are allocated in WashNetworkCreate() */
    666:     /* vEnd - vStart = nvertices + number of ghost vertices! */
    667:     PetscCalloc2(vEnd - vStart,&junctions,nedges,&pipes);
    668:   }

    670:   /* Add Pipe component and number of variables to all local edges */
    671:   for (e = eStart; e < eEnd; e++) {
    672:     pipes[e-eStart].nnodes = nnodes;
    673:     DMNetworkAddComponent(networkdm,e,KeyPipe,&pipes[e-eStart],2*pipes[e-eStart].nnodes);

    675:     if (size == 1 && monipipes) { /* Add monitor -- show Q_{pipes[e-eStart].id}? */
    676:       pipes[e-eStart].length = 600.0;
    677:       DMNetworkMonitorAdd(monitor, "Pipe Q", e, pipes[e-eStart].nnodes, 0, 2, 0.0,pipes[e-eStart].length, -0.8, 0.8, PETSC_TRUE);
    678:       DMNetworkMonitorAdd(monitor, "Pipe H", e, pipes[e-eStart].nnodes, 1, 2, 0.0,pipes[e-eStart].length, -400.0, 800.0, PETSC_TRUE);
    679:     }
    680:   }

    682:   /* Add Junction component and number of variables to all local vertices, including ghost vertices! (current implementation requires setting the same number of variables at ghost points */
    683:   for (v = vStart; v < vEnd; v++) {
    684:     DMNetworkAddComponent(networkdm,v,KeyJunction,&junctions[v-vStart],2);
    685:   }

    687:   if (size > 1) {  /* must be called before DMSetUp()???. Other partitioners do not work yet??? -- cause crash in proc[0]! */
    688:     DM               plexdm;
    689:     PetscPartitioner part;
    690:     DMNetworkGetPlex(networkdm,&plexdm);
    691:     DMPlexGetPartitioner(plexdm, &part);
    692:     PetscPartitionerSetType(part,PETSCPARTITIONERSIMPLE);
    693:     PetscOptionsSetValue(NULL,"-dm_plex_csr_via_mat","true"); /* for parmetis */
    694:   }

    696:   /* Set up DM for use */
    697:   DMSetUp(networkdm);
    698:   if (viewdm) {
    699:     PetscPrintf(PETSC_COMM_WORLD,"\nOriginal networkdm, DMView:\n");
    700:     DMView(networkdm,PETSC_VIEWER_STDOUT_WORLD);
    701:   }

    703:   /* Set user physical parameters to the components */
    704:   for (e = eStart; e < eEnd; e++) {
    705:     DMNetworkGetConnectedVertices(networkdm,e,&cone);
    706:     /* vfrom */
    707:     DMNetworkGetComponent(networkdm,cone[0],0,&vkey,(void**)&junction,NULL);
    708:     junction->type = (VertexType)vtype[2*e];

    710:     /* vto */
    711:     DMNetworkGetComponent(networkdm,cone[1],0,&vkey,(void**)&junction,NULL);
    712:     junction->type = (VertexType)vtype[2*e+1];
    713:   }

    715:   WashNetworkCleanUp(wash);

    717:   /* Network partitioning and distribution of data */
    718:   DMNetworkDistribute(&networkdm,0);
    719:   if (viewdm) {
    720:     PetscPrintf(PETSC_COMM_WORLD,"\nAfter DMNetworkDistribute, DMView:\n");
    721:     DMView(networkdm,PETSC_VIEWER_STDOUT_WORLD);
    722:   }

    724:   /* create vectors */
    725:   DMCreateGlobalVector(networkdm,&X);
    726:   DMCreateLocalVector(networkdm,&wash->localX);
    727:   DMCreateLocalVector(networkdm,&wash->localXdot);

    729:   /* PipeSetUp -- each process only sets its own pipes */
    730:   /*---------------------------------------------------*/
    731:   DMNetworkGetVertexRange(networkdm,&vStart,&vEnd);

    733:   userJac = PETSC_TRUE;
    734:   DMNetworkHasJacobian(networkdm,userJac,userJac);
    735:   DMNetworkGetEdgeRange(networkdm,&eStart,&eEnd);
    736:   for (e=eStart; e<eEnd; e++) { /* each edge has only one component, pipe */
    737:     DMNetworkGetComponent(networkdm,e,0,&type,(void**)&pipe,NULL);

    739:     wash->nnodes_loc += pipe->nnodes; /* local total number of nodes, will be used by PipesView() */
    740:     PipeSetParameters(pipe,
    741:                              600.0,          /* length */
    742:                              0.5,            /* diameter */
    743:                              1200.0,         /* a */
    744:                              0.018);    /* friction */
    745:     PipeSetUp(pipe);

    747:     if (userJac) {
    748:       /* Create Jacobian matrix structures for a Pipe */
    749:       Mat            *J;
    750:       PipeCreateJacobian(pipe,NULL,&J);
    751:       DMNetworkEdgeSetMatrix(networkdm,e,J);
    752:     }
    753:   }

    755:   if (userJac) {
    756:     DMNetworkGetVertexRange(networkdm,&vStart,&vEnd);
    757:     for (v=vStart; v<vEnd; v++) {
    758:       Mat            *J;
    759:       JunctionCreateJacobian(networkdm,v,NULL,&J);
    760:       DMNetworkVertexSetMatrix(networkdm,v,J);

    762:       DMNetworkGetComponent(networkdm,v,0,&vkey,(void**)&junction,NULL);
    763:       junction->jacobian = J;
    764:     }
    765:   }

    767:   /* Setup solver                                           */
    768:   /*--------------------------------------------------------*/
    769:   TSCreate(PETSC_COMM_WORLD,&ts);

    771:   TSSetDM(ts,(DM)networkdm);
    772:   TSSetIFunction(ts,NULL,WASHIFunction,wash);

    774:   TSSetMaxSteps(ts,steps);
    775:   TSSetExactFinalTime(ts,TS_EXACTFINALTIME_STEPOVER);
    776:   TSSetTimeStep(ts,0.1);
    777:   TSSetType(ts,TSBEULER);
    778:   if (size == 1 && monipipes) {
    779:     TSMonitorSet(ts, TSDMNetworkMonitor, monitor, NULL);
    780:   }
    781:   TSSetFromOptions(ts);

    783:   WASHSetInitialSolution(networkdm,X,wash);

    785:   TSSolve(ts,X);

    787:   TSGetSolveTime(ts,&ftime);
    788:   TSGetStepNumber(ts,&steps);
    789:   TSGetConvergedReason(ts,&reason);
    790:   PetscPrintf(PETSC_COMM_WORLD,"%s at time %g after %D steps\n",TSConvergedReasons[reason],(double)ftime,steps);
    791:   if (viewX) {
    792:     VecView(X,PETSC_VIEWER_STDOUT_WORLD);
    793:   }

    795:   viewpipes = PETSC_FALSE;
    796:   PetscOptionsGetBool(NULL,NULL, "-Jac_view", &viewpipes,NULL);
    797:   if (viewpipes) {
    798:     SNES snes;
    799:     Mat  Jac;
    800:     TSGetSNES(ts,&snes);
    801:     SNESGetJacobian(snes,&Jac,NULL,NULL,NULL);
    802:     MatView(Jac,PETSC_VIEWER_DRAW_WORLD);
    803:   }

    805:   /* View solution q and h */
    806:   /* --------------------- */
    807:   viewpipes = PETSC_FALSE;
    808:   PetscOptionsGetBool(NULL,NULL, "-pipe_view", &viewpipes,NULL);
    809:   if (viewpipes) {
    810:     PipesView(X,networkdm,wash);
    811:   }

    813:   /* Free spaces */
    814:   /* ----------- */
    815:   TSDestroy(&ts);
    816:   VecDestroy(&X);
    817:   VecDestroy(&wash->localX);
    818:   VecDestroy(&wash->localXdot);

    820:   /* Destroy objects from each pipe that are created in PipeSetUp() */
    821:   DMNetworkGetEdgeRange(networkdm,&eStart, &eEnd);
    822:   for (i = eStart; i < eEnd; i++) {
    823:     DMNetworkGetComponent(networkdm,i,0,&key,(void**)&pipe,NULL);
    824:     PipeDestroy(&pipe);
    825:   }
    826:   if (userJac) {
    827:     for (v=vStart; v<vEnd; v++) {
    828:       DMNetworkGetComponent(networkdm,v,0,&vkey,(void**)&junction,NULL);
    829:       JunctionDestroyJacobian(networkdm,v,junction);
    830:     }
    831:   }

    833:   if (size == 1 && monipipes) {
    834:     DMNetworkMonitorDestroy(&monitor);
    835:   }
    836:   DMDestroy(&networkdm);
    837:   PetscFree(wash);

    839:   if (rank) {
    840:     PetscFree2(junctions,pipes);
    841:   }
    842:   PetscFinalize();
    843:   return ierr;
    844: }

    846: /*TEST

    848:    build:
    849:      depends: pipeInterface.c pipeImpls.c

    851:    test:
    852:       args: -ts_monitor -case 1 -ts_max_steps 1 -options_left no -viewX
    853:       localrunfiles: pOption
    854:       output_file: output/pipes1_1.out

    856:    test:
    857:       suffix: 2
    858:       nsize: 2
    859:       requires: mumps
    860:       args: -ts_monitor -case 1 -ts_max_steps 1 -petscpartitioner_type simple -options_left no -viewX
    861:       localrunfiles: pOption
    862:       output_file: output/pipes1_2.out

    864:    test:
    865:       suffix: 3
    866:       nsize: 2
    867:       requires: mumps
    868:       args: -ts_monitor -case 0 -ts_max_steps 1 -petscpartitioner_type simple -options_left no -viewX
    869:       localrunfiles: pOption
    870:       output_file: output/pipes1_3.out

    872:    test:
    873:       suffix: 4
    874:       args: -ts_monitor -case 2 -ts_max_steps 1 -options_left no -viewX
    875:       localrunfiles: pOption
    876:       output_file: output/pipes1_4.out

    878:    test:
    879:       suffix: 5
    880:       nsize: 3
    881:       requires: mumps
    882:       args: -ts_monitor -case 2 -ts_max_steps 10 -petscpartitioner_type simple -options_left no -viewX
    883:       localrunfiles: pOption
    884:       output_file: output/pipes1_5.out

    886:    test:
    887:       suffix: 6
    888:       nsize: 2
    889:       requires: mumps
    890:       args: -ts_monitor -case 1 -ts_max_steps 1 -petscpartitioner_type simple -options_left no -wash_distribute 0 -viewX
    891:       localrunfiles: pOption
    892:       output_file: output/pipes1_6.out

    894:    test:
    895:       suffix: 7
    896:       nsize: 2
    897:       requires: mumps
    898:       args: -ts_monitor -case 2 -ts_max_steps 1 -petscpartitioner_type simple -options_left no -wash_distribute 0 -viewX
    899:       localrunfiles: pOption
    900:       output_file: output/pipes1_7.out

    902:    test:
    903:       suffix: 8
    904:       nsize: 2
    905:       requires: mumps parmetis
    906:       args: -ts_monitor -case 2 -ts_max_steps 1 -petscpartitioner_type parmetis -options_left no -wash_distribute 1
    907:       localrunfiles: pOption
    908:       output_file: output/pipes1_8.out

    910: TEST*/