Actual source code: telescope_dmda.c
petsc-3.12.5 2020-03-29
3: #include <petsc/private/matimpl.h>
4: #include <petsc/private/pcimpl.h>
5: #include <petsc/private/dmimpl.h>
6: #include <petscksp.h>
7: #include <petscdm.h>
8: #include <petscdmda.h>
10: #include "../src/ksp/pc/impls/telescope/telescope.h"
12: static PetscBool cited = PETSC_FALSE;
13: static const char citation[] =
14: "@inproceedings{MaySananRuppKnepleySmith2016,\n"
15: " title = {Extreme-Scale Multigrid Components within PETSc},\n"
16: " author = {Dave A. May and Patrick Sanan and Karl Rupp and Matthew G. Knepley and Barry F. Smith},\n"
17: " booktitle = {Proceedings of the Platform for Advanced Scientific Computing Conference},\n"
18: " series = {PASC '16},\n"
19: " isbn = {978-1-4503-4126-4},\n"
20: " location = {Lausanne, Switzerland},\n"
21: " pages = {5:1--5:12},\n"
22: " articleno = {5},\n"
23: " numpages = {12},\n"
24: " url = {https://doi.acm.org/10.1145/2929908.2929913},\n"
25: " doi = {10.1145/2929908.2929913},\n"
26: " acmid = {2929913},\n"
27: " publisher = {ACM},\n"
28: " address = {New York, NY, USA},\n"
29: " keywords = {GPU, HPC, agglomeration, coarse-level solver, multigrid, parallel computing, preconditioning},\n"
30: " year = {2016}\n"
31: "}\n";
33: static PetscErrorCode _DMDADetermineRankFromGlobalIJK(PetscInt dim,PetscInt i,PetscInt j,PetscInt k,
34: PetscInt Mp,PetscInt Np,PetscInt Pp,
35: PetscInt start_i[],PetscInt start_j[],PetscInt start_k[],
36: PetscInt span_i[],PetscInt span_j[],PetscInt span_k[],
37: PetscMPIInt *_pi,PetscMPIInt *_pj,PetscMPIInt *_pk,PetscMPIInt *rank_re)
38: {
39: PetscInt pi,pj,pk,n;
42: *rank_re = -1;
43: if (_pi) *_pi = -1;
44: if (_pj) *_pj = -1;
45: if (_pk) *_pk = -1;
46: pi = pj = pk = -1;
47: if (_pi) {
48: for (n=0; n<Mp; n++) {
49: if ( (i >= start_i[n]) && (i < start_i[n]+span_i[n]) ) {
50: pi = n;
51: break;
52: }
53: }
54: if (pi == -1) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_USER,"[dmda-ijk] pi cannot be determined : range %D, val %D",Mp,i);
55: *_pi = pi;
56: }
58: if (_pj) {
59: for (n=0; n<Np; n++) {
60: if ( (j >= start_j[n]) && (j < start_j[n]+span_j[n]) ) {
61: pj = n;
62: break;
63: }
64: }
65: if (pj == -1) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_USER,"[dmda-ijk] pj cannot be determined : range %D, val %D",Np,j);
66: *_pj = pj;
67: }
69: if (_pk) {
70: for (n=0; n<Pp; n++) {
71: if ( (k >= start_k[n]) && (k < start_k[n]+span_k[n]) ) {
72: pk = n;
73: break;
74: }
75: }
76: if (pk == -1) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_USER,"[dmda-ijk] pk cannot be determined : range %D, val %D",Pp,k);
77: *_pk = pk;
78: }
80: switch (dim) {
81: case 1:
82: *rank_re = pi;
83: break;
84: case 2:
85: *rank_re = pi + pj * Mp;
86: break;
87: case 3:
88: *rank_re = pi + pj * Mp + pk * (Mp*Np);
89: break;
90: }
91: return(0);
92: }
94: static PetscErrorCode _DMDADetermineGlobalS0(PetscInt dim,PetscMPIInt rank_re,PetscInt Mp_re,PetscInt Np_re,PetscInt Pp_re,
95: PetscInt range_i_re[],PetscInt range_j_re[],PetscInt range_k_re[],PetscInt *s0)
96: {
97: PetscInt i,j,k,start_IJK = 0;
98: PetscInt rank_ijk;
101: switch (dim) {
102: case 1:
103: for (i=0; i<Mp_re; i++) {
104: rank_ijk = i;
105: if (rank_ijk < rank_re) {
106: start_IJK += range_i_re[i];
107: }
108: }
109: break;
110: case 2:
111: for (j=0; j<Np_re; j++) {
112: for (i=0; i<Mp_re; i++) {
113: rank_ijk = i + j*Mp_re;
114: if (rank_ijk < rank_re) {
115: start_IJK += range_i_re[i]*range_j_re[j];
116: }
117: }
118: }
119: break;
120: case 3:
121: for (k=0; k<Pp_re; k++) {
122: for (j=0; j<Np_re; j++) {
123: for (i=0; i<Mp_re; i++) {
124: rank_ijk = i + j*Mp_re + k*Mp_re*Np_re;
125: if (rank_ijk < rank_re) {
126: start_IJK += range_i_re[i]*range_j_re[j]*range_k_re[k];
127: }
128: }
129: }
130: }
131: break;
132: }
133: *s0 = start_IJK;
134: return(0);
135: }
137: static PetscErrorCode PCTelescopeSetUp_dmda_repart_coors2d(PC_Telescope sred,DM dm,DM subdm)
138: {
140: DM cdm;
141: Vec coor,coor_natural,perm_coors;
142: PetscInt i,j,si,sj,ni,nj,M,N,Ml,Nl,c,nidx;
143: PetscInt *fine_indices;
144: IS is_fine,is_local;
145: VecScatter sctx;
148: DMGetCoordinates(dm,&coor);
149: if (!coor) return(0);
150: if (PCTelescope_isActiveRank(sred)) {
151: DMDASetUniformCoordinates(subdm,0.0,1.0,0.0,1.0,0.0,1.0);
152: }
153: /* Get the coordinate vector from the distributed array */
154: DMGetCoordinateDM(dm,&cdm);
155: DMDACreateNaturalVector(cdm,&coor_natural);
157: DMDAGlobalToNaturalBegin(cdm,coor,INSERT_VALUES,coor_natural);
158: DMDAGlobalToNaturalEnd(cdm,coor,INSERT_VALUES,coor_natural);
160: /* get indices of the guys I want to grab */
161: DMDAGetInfo(dm,NULL,&M,&N,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
162: if (PCTelescope_isActiveRank(sred)) {
163: DMDAGetCorners(subdm,&si,&sj,NULL,&ni,&nj,NULL);
164: Ml = ni;
165: Nl = nj;
166: } else {
167: si = sj = 0;
168: ni = nj = 0;
169: Ml = Nl = 0;
170: }
172: PetscMalloc1(Ml*Nl*2,&fine_indices);
173: c = 0;
174: if (PCTelescope_isActiveRank(sred)) {
175: for (j=sj; j<sj+nj; j++) {
176: for (i=si; i<si+ni; i++) {
177: nidx = (i) + (j)*M;
178: fine_indices[c ] = 2 * nidx ;
179: fine_indices[c+1] = 2 * nidx + 1 ;
180: c = c + 2;
181: }
182: }
183: if (c != Ml*Nl*2) SETERRQ3(PETSC_COMM_SELF,PETSC_ERR_PLIB,"c %D should equal 2 * Ml %D * Nl %D",c,Ml,Nl);
184: }
186: /* generate scatter */
187: ISCreateGeneral(PetscObjectComm((PetscObject)dm),Ml*Nl*2,fine_indices,PETSC_USE_POINTER,&is_fine);
188: ISCreateStride(PETSC_COMM_SELF,Ml*Nl*2,0,1,&is_local);
190: /* scatter */
191: VecCreate(PETSC_COMM_SELF,&perm_coors);
192: VecSetSizes(perm_coors,PETSC_DECIDE,Ml*Nl*2);
193: VecSetType(perm_coors,VECSEQ);
195: VecScatterCreate(coor_natural,is_fine,perm_coors,is_local,&sctx);
196: VecScatterBegin(sctx,coor_natural,perm_coors,INSERT_VALUES,SCATTER_FORWARD);
197: VecScatterEnd( sctx,coor_natural,perm_coors,INSERT_VALUES,SCATTER_FORWARD);
198: /* access */
199: if (PCTelescope_isActiveRank(sred)) {
200: Vec _coors;
201: const PetscScalar *LA_perm;
202: PetscScalar *LA_coors;
204: DMGetCoordinates(subdm,&_coors);
205: VecGetArrayRead(perm_coors,&LA_perm);
206: VecGetArray(_coors,&LA_coors);
207: for (i=0; i<Ml*Nl*2; i++) {
208: LA_coors[i] = LA_perm[i];
209: }
210: VecRestoreArray(_coors,&LA_coors);
211: VecRestoreArrayRead(perm_coors,&LA_perm);
212: }
214: /* update local coords */
215: if (PCTelescope_isActiveRank(sred)) {
216: DM _dmc;
217: Vec _coors,_coors_local;
218: DMGetCoordinateDM(subdm,&_dmc);
219: DMGetCoordinates(subdm,&_coors);
220: DMGetCoordinatesLocal(subdm,&_coors_local);
221: DMGlobalToLocalBegin(_dmc,_coors,INSERT_VALUES,_coors_local);
222: DMGlobalToLocalEnd(_dmc,_coors,INSERT_VALUES,_coors_local);
223: }
224: VecScatterDestroy(&sctx);
225: ISDestroy(&is_fine);
226: PetscFree(fine_indices);
227: ISDestroy(&is_local);
228: VecDestroy(&perm_coors);
229: VecDestroy(&coor_natural);
230: return(0);
231: }
233: static PetscErrorCode PCTelescopeSetUp_dmda_repart_coors3d(PC_Telescope sred,DM dm,DM subdm)
234: {
236: DM cdm;
237: Vec coor,coor_natural,perm_coors;
238: PetscInt i,j,k,si,sj,sk,ni,nj,nk,M,N,P,Ml,Nl,Pl,c,nidx;
239: PetscInt *fine_indices;
240: IS is_fine,is_local;
241: VecScatter sctx;
244: DMGetCoordinates(dm,&coor);
245: if (!coor) return(0);
247: if (PCTelescope_isActiveRank(sred)) {
248: DMDASetUniformCoordinates(subdm,0.0,1.0,0.0,1.0,0.0,1.0);
249: }
251: /* Get the coordinate vector from the distributed array */
252: DMGetCoordinateDM(dm,&cdm);
253: DMDACreateNaturalVector(cdm,&coor_natural);
254: DMDAGlobalToNaturalBegin(cdm,coor,INSERT_VALUES,coor_natural);
255: DMDAGlobalToNaturalEnd(cdm,coor,INSERT_VALUES,coor_natural);
257: /* get indices of the guys I want to grab */
258: DMDAGetInfo(dm,NULL,&M,&N,&P,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
260: if (PCTelescope_isActiveRank(sred)) {
261: DMDAGetCorners(subdm,&si,&sj,&sk,&ni,&nj,&nk);
262: Ml = ni;
263: Nl = nj;
264: Pl = nk;
265: } else {
266: si = sj = sk = 0;
267: ni = nj = nk = 0;
268: Ml = Nl = Pl = 0;
269: }
271: PetscMalloc1(Ml*Nl*Pl*3,&fine_indices);
273: c = 0;
274: if (PCTelescope_isActiveRank(sred)) {
275: for (k=sk; k<sk+nk; k++) {
276: for (j=sj; j<sj+nj; j++) {
277: for (i=si; i<si+ni; i++) {
278: nidx = (i) + (j)*M + (k)*M*N;
279: fine_indices[c ] = 3 * nidx ;
280: fine_indices[c+1] = 3 * nidx + 1 ;
281: fine_indices[c+2] = 3 * nidx + 2 ;
282: c = c + 3;
283: }
284: }
285: }
286: }
288: /* generate scatter */
289: ISCreateGeneral(PetscObjectComm((PetscObject)dm),Ml*Nl*Pl*3,fine_indices,PETSC_USE_POINTER,&is_fine);
290: ISCreateStride(PETSC_COMM_SELF,Ml*Nl*Pl*3,0,1,&is_local);
292: /* scatter */
293: VecCreate(PETSC_COMM_SELF,&perm_coors);
294: VecSetSizes(perm_coors,PETSC_DECIDE,Ml*Nl*Pl*3);
295: VecSetType(perm_coors,VECSEQ);
296: VecScatterCreate(coor_natural,is_fine,perm_coors,is_local,&sctx);
297: VecScatterBegin(sctx,coor_natural,perm_coors,INSERT_VALUES,SCATTER_FORWARD);
298: VecScatterEnd( sctx,coor_natural,perm_coors,INSERT_VALUES,SCATTER_FORWARD);
300: /* access */
301: if (PCTelescope_isActiveRank(sred)) {
302: Vec _coors;
303: const PetscScalar *LA_perm;
304: PetscScalar *LA_coors;
306: DMGetCoordinates(subdm,&_coors);
307: VecGetArrayRead(perm_coors,&LA_perm);
308: VecGetArray(_coors,&LA_coors);
309: for (i=0; i<Ml*Nl*Pl*3; i++) {
310: LA_coors[i] = LA_perm[i];
311: }
312: VecRestoreArray(_coors,&LA_coors);
313: VecRestoreArrayRead(perm_coors,&LA_perm);
314: }
316: /* update local coords */
317: if (PCTelescope_isActiveRank(sred)) {
318: DM _dmc;
319: Vec _coors,_coors_local;
321: DMGetCoordinateDM(subdm,&_dmc);
322: DMGetCoordinates(subdm,&_coors);
323: DMGetCoordinatesLocal(subdm,&_coors_local);
324: DMGlobalToLocalBegin(_dmc,_coors,INSERT_VALUES,_coors_local);
325: DMGlobalToLocalEnd(_dmc,_coors,INSERT_VALUES,_coors_local);
326: }
328: VecScatterDestroy(&sctx);
329: ISDestroy(&is_fine);
330: PetscFree(fine_indices);
331: ISDestroy(&is_local);
332: VecDestroy(&perm_coors);
333: VecDestroy(&coor_natural);
334: return(0);
335: }
337: static PetscErrorCode PCTelescopeSetUp_dmda_repart_coors(PC pc,PC_Telescope sred,PC_Telescope_DMDACtx *ctx)
338: {
339: PetscInt dim;
340: DM dm,subdm;
341: PetscSubcomm psubcomm;
342: MPI_Comm comm;
343: Vec coor;
347: PCGetDM(pc,&dm);
348: DMGetCoordinates(dm,&coor);
349: if (!coor) return(0);
350: psubcomm = sred->psubcomm;
351: comm = PetscSubcommParent(psubcomm);
352: subdm = ctx->dmrepart;
354: PetscInfo(pc,"PCTelescope: setting up the coordinates (DMDA)\n");
355: DMDAGetInfo(dm,&dim,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
356: switch (dim) {
357: case 1: SETERRQ(comm,PETSC_ERR_SUP,"Telescope: DMDA (1D) repartitioning not provided");
358: break;
359: case 2: PCTelescopeSetUp_dmda_repart_coors2d(sred,dm,subdm);
360: break;
361: case 3: PCTelescopeSetUp_dmda_repart_coors3d(sred,dm,subdm);
362: break;
363: }
364: return(0);
365: }
367: /* setup repartitioned dm */
368: PetscErrorCode PCTelescopeSetUp_dmda_repart(PC pc,PC_Telescope sred,PC_Telescope_DMDACtx *ctx)
369: {
370: PetscErrorCode ierr;
371: DM dm;
372: PetscInt dim,nx,ny,nz,ndof,nsw,sum,k;
373: DMBoundaryType bx,by,bz;
374: DMDAStencilType stencil;
375: const PetscInt *_range_i_re;
376: const PetscInt *_range_j_re;
377: const PetscInt *_range_k_re;
378: DMDAInterpolationType itype;
379: PetscInt refine_x,refine_y,refine_z;
380: MPI_Comm comm,subcomm;
381: const char *prefix;
384: comm = PetscSubcommParent(sred->psubcomm);
385: subcomm = PetscSubcommChild(sred->psubcomm);
386: PCGetDM(pc,&dm);
388: DMDAGetInfo(dm,&dim,&nx,&ny,&nz,NULL,NULL,NULL,&ndof,&nsw,&bx,&by,&bz,&stencil);
389: DMDAGetInterpolationType(dm,&itype);
390: DMDAGetRefinementFactor(dm,&refine_x,&refine_y,&refine_z);
392: ctx->dmrepart = NULL;
393: _range_i_re = _range_j_re = _range_k_re = NULL;
394: /* Create DMDA on the child communicator */
395: if (PCTelescope_isActiveRank(sred)) {
396: switch (dim) {
397: case 1:
398: PetscInfo(pc,"PCTelescope: setting up the DMDA on comm subset (1D)\n");
399: /*DMDACreate1d(subcomm,bx,nx,ndof,nsw,NULL,&ctx->dmrepart);*/
400: ny = nz = 1;
401: by = bz = DM_BOUNDARY_NONE;
402: break;
403: case 2:
404: PetscInfo(pc,"PCTelescope: setting up the DMDA on comm subset (2D)\n");
405: /*DMDACreate2d(subcomm,bx,by,stencil,nx,ny, PETSC_DECIDE,PETSC_DECIDE, ndof,nsw, NULL,NULL,&ctx->dmrepart);*/
406: nz = 1;
407: bz = DM_BOUNDARY_NONE;
408: break;
409: case 3:
410: PetscInfo(pc,"PCTelescope: setting up the DMDA on comm subset (3D)\n");
411: /*DMDACreate3d(subcomm,bx,by,bz,stencil,nx,ny,nz, PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE, ndof,nsw, NULL,NULL,NULL,&ctx->dmrepart);*/
412: break;
413: }
414: /*
415: The API DMDACreate1d(), DMDACreate2d(), DMDACreate3d() does not allow us to set/append
416: a unique option prefix for the DM, thus I prefer to expose the contents of these API's here.
417: This allows users to control the partitioning of the subDM.
418: */
419: DMDACreate(subcomm,&ctx->dmrepart);
420: /* Set unique option prefix name */
421: KSPGetOptionsPrefix(sred->ksp,&prefix);
422: DMSetOptionsPrefix(ctx->dmrepart,prefix);
423: DMAppendOptionsPrefix(ctx->dmrepart,"repart_");
424: /* standard setup from DMDACreate{1,2,3}d() */
425: DMSetDimension(ctx->dmrepart,dim);
426: DMDASetSizes(ctx->dmrepart,nx,ny,nz);
427: DMDASetNumProcs(ctx->dmrepart,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE);
428: DMDASetBoundaryType(ctx->dmrepart,bx,by,bz);
429: DMDASetDof(ctx->dmrepart,ndof);
430: DMDASetStencilType(ctx->dmrepart,stencil);
431: DMDASetStencilWidth(ctx->dmrepart,nsw);
432: DMDASetOwnershipRanges(ctx->dmrepart,NULL,NULL,NULL);
433: DMSetFromOptions(ctx->dmrepart);
434: DMSetUp(ctx->dmrepart);
435: /* Set refinement factors and interpolation type from the partent */
436: DMDASetRefinementFactor(ctx->dmrepart,refine_x,refine_y,refine_z);
437: DMDASetInterpolationType(ctx->dmrepart,itype);
439: DMDAGetInfo(ctx->dmrepart,NULL,NULL,NULL,NULL,&ctx->Mp_re,&ctx->Np_re,&ctx->Pp_re,NULL,NULL,NULL,NULL,NULL,NULL);
440: DMDAGetOwnershipRanges(ctx->dmrepart,&_range_i_re,&_range_j_re,&_range_k_re);
442: ctx->dmrepart->ops->creatematrix = dm->ops->creatematrix;
443: ctx->dmrepart->ops->createdomaindecomposition = dm->ops->createdomaindecomposition;
444: }
446: /* generate ranges for repartitioned dm */
447: /* note - assume rank 0 always participates */
448: /* TODO: use a single MPI call */
449: MPI_Bcast(&ctx->Mp_re,1,MPIU_INT,0,comm);
450: MPI_Bcast(&ctx->Np_re,1,MPIU_INT,0,comm);
451: MPI_Bcast(&ctx->Pp_re,1,MPIU_INT,0,comm);
453: PetscCalloc3(ctx->Mp_re,&ctx->range_i_re,ctx->Np_re,&ctx->range_j_re,ctx->Pp_re,&ctx->range_k_re);
455: if (_range_i_re) {PetscArraycpy(ctx->range_i_re,_range_i_re,ctx->Mp_re);}
456: if (_range_j_re) {PetscArraycpy(ctx->range_j_re,_range_j_re,ctx->Np_re);}
457: if (_range_k_re) {PetscArraycpy(ctx->range_k_re,_range_k_re,ctx->Pp_re);}
459: /* TODO: use a single MPI call */
460: MPI_Bcast(ctx->range_i_re,ctx->Mp_re,MPIU_INT,0,comm);
461: MPI_Bcast(ctx->range_j_re,ctx->Np_re,MPIU_INT,0,comm);
462: MPI_Bcast(ctx->range_k_re,ctx->Pp_re,MPIU_INT,0,comm);
464: PetscMalloc3(ctx->Mp_re,&ctx->start_i_re,ctx->Np_re,&ctx->start_j_re,ctx->Pp_re,&ctx->start_k_re);
466: sum = 0;
467: for (k=0; k<ctx->Mp_re; k++) {
468: ctx->start_i_re[k] = sum;
469: sum += ctx->range_i_re[k];
470: }
472: sum = 0;
473: for (k=0; k<ctx->Np_re; k++) {
474: ctx->start_j_re[k] = sum;
475: sum += ctx->range_j_re[k];
476: }
478: sum = 0;
479: for (k=0; k<ctx->Pp_re; k++) {
480: ctx->start_k_re[k] = sum;
481: sum += ctx->range_k_re[k];
482: }
484: /* attach repartitioned dm to child ksp */
485: {
486: PetscErrorCode (*dmksp_func)(KSP,Mat,Mat,void*);
487: void *dmksp_ctx;
489: DMKSPGetComputeOperators(dm,&dmksp_func,&dmksp_ctx);
491: /* attach dm to ksp on sub communicator */
492: if (PCTelescope_isActiveRank(sred)) {
493: KSPSetDM(sred->ksp,ctx->dmrepart);
495: if (!dmksp_func || sred->ignore_kspcomputeoperators) {
496: KSPSetDMActive(sred->ksp,PETSC_FALSE);
497: } else {
498: /* sub ksp inherits dmksp_func and context provided by user */
499: KSPSetComputeOperators(sred->ksp,dmksp_func,dmksp_ctx);
500: KSPSetDMActive(sred->ksp,PETSC_TRUE);
501: }
502: }
503: }
504: return(0);
505: }
507: PetscErrorCode PCTelescopeSetUp_dmda_permutation_3d(PC pc,PC_Telescope sred,PC_Telescope_DMDACtx *ctx)
508: {
510: DM dm;
511: MPI_Comm comm;
512: Mat Pscalar,P;
513: PetscInt ndof;
514: PetscInt i,j,k,location,startI[3],endI[3],lenI[3],nx,ny,nz;
515: PetscInt sr,er,Mr;
516: Vec V;
519: PetscInfo(pc,"PCTelescope: setting up the permutation matrix (DMDA-3D)\n");
520: PetscObjectGetComm((PetscObject)pc,&comm);
522: PCGetDM(pc,&dm);
523: DMDAGetInfo(dm,NULL,&nx,&ny,&nz,NULL,NULL,NULL,&ndof,NULL,NULL,NULL,NULL,NULL);
525: DMGetGlobalVector(dm,&V);
526: VecGetSize(V,&Mr);
527: VecGetOwnershipRange(V,&sr,&er);
528: DMRestoreGlobalVector(dm,&V);
529: sr = sr / ndof;
530: er = er / ndof;
531: Mr = Mr / ndof;
533: MatCreate(comm,&Pscalar);
534: MatSetSizes(Pscalar,(er-sr),(er-sr),Mr,Mr);
535: MatSetType(Pscalar,MATAIJ);
536: MatSeqAIJSetPreallocation(Pscalar,1,NULL);
537: MatMPIAIJSetPreallocation(Pscalar,1,NULL,1,NULL);
539: DMDAGetCorners(dm,NULL,NULL,NULL,&lenI[0],&lenI[1],&lenI[2]);
540: DMDAGetCorners(dm,&startI[0],&startI[1],&startI[2],&endI[0],&endI[1],&endI[2]);
541: endI[0] += startI[0];
542: endI[1] += startI[1];
543: endI[2] += startI[2];
545: for (k=startI[2]; k<endI[2]; k++) {
546: for (j=startI[1]; j<endI[1]; j++) {
547: for (i=startI[0]; i<endI[0]; i++) {
548: PetscMPIInt rank_ijk_re,rank_reI[3];
549: PetscInt s0_re;
550: PetscInt ii,jj,kk,local_ijk_re,mapped_ijk;
551: PetscInt lenI_re[3];
553: location = (i - startI[0]) + (j - startI[1])*lenI[0] + (k - startI[2])*lenI[0]*lenI[1];
554: _DMDADetermineRankFromGlobalIJK(3,i,j,k, ctx->Mp_re,ctx->Np_re,ctx->Pp_re,
555: ctx->start_i_re,ctx->start_j_re,ctx->start_k_re,
556: ctx->range_i_re,ctx->range_j_re,ctx->range_k_re,
557: &rank_reI[0],&rank_reI[1],&rank_reI[2],&rank_ijk_re);
558: _DMDADetermineGlobalS0(3,rank_ijk_re, ctx->Mp_re,ctx->Np_re,ctx->Pp_re, ctx->range_i_re,ctx->range_j_re,ctx->range_k_re, &s0_re);
559: ii = i - ctx->start_i_re[ rank_reI[0] ];
560: if (ii < 0) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_USER,"[dmdarepart-perm3d] index error ii");
561: jj = j - ctx->start_j_re[ rank_reI[1] ];
562: if (jj < 0) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_USER,"[dmdarepart-perm3d] index error jj");
563: kk = k - ctx->start_k_re[ rank_reI[2] ];
564: if (kk < 0) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_USER,"[dmdarepart-perm3d] index error kk");
565: lenI_re[0] = ctx->range_i_re[ rank_reI[0] ];
566: lenI_re[1] = ctx->range_j_re[ rank_reI[1] ];
567: lenI_re[2] = ctx->range_k_re[ rank_reI[2] ];
568: local_ijk_re = ii + jj * lenI_re[0] + kk * lenI_re[0] * lenI_re[1];
569: mapped_ijk = s0_re + local_ijk_re;
570: MatSetValue(Pscalar,sr+location,mapped_ijk,1.0,INSERT_VALUES);
571: }
572: }
573: }
574: MatAssemblyBegin(Pscalar,MAT_FINAL_ASSEMBLY);
575: MatAssemblyEnd(Pscalar,MAT_FINAL_ASSEMBLY);
576: MatCreateMAIJ(Pscalar,ndof,&P);
577: MatDestroy(&Pscalar);
578: ctx->permutation = P;
579: return(0);
580: }
582: PetscErrorCode PCTelescopeSetUp_dmda_permutation_2d(PC pc,PC_Telescope sred,PC_Telescope_DMDACtx *ctx)
583: {
585: DM dm;
586: MPI_Comm comm;
587: Mat Pscalar,P;
588: PetscInt ndof;
589: PetscInt i,j,location,startI[2],endI[2],lenI[2],nx,ny,nz;
590: PetscInt sr,er,Mr;
591: Vec V;
594: PetscInfo(pc,"PCTelescope: setting up the permutation matrix (DMDA-2D)\n");
595: PetscObjectGetComm((PetscObject)pc,&comm);
596: PCGetDM(pc,&dm);
597: DMDAGetInfo(dm,NULL,&nx,&ny,&nz,NULL,NULL,NULL,&ndof,NULL,NULL,NULL,NULL,NULL);
598: DMGetGlobalVector(dm,&V);
599: VecGetSize(V,&Mr);
600: VecGetOwnershipRange(V,&sr,&er);
601: DMRestoreGlobalVector(dm,&V);
602: sr = sr / ndof;
603: er = er / ndof;
604: Mr = Mr / ndof;
606: MatCreate(comm,&Pscalar);
607: MatSetSizes(Pscalar,(er-sr),(er-sr),Mr,Mr);
608: MatSetType(Pscalar,MATAIJ);
609: MatSeqAIJSetPreallocation(Pscalar,1,NULL);
610: MatMPIAIJSetPreallocation(Pscalar,1,NULL,1,NULL);
612: DMDAGetCorners(dm,NULL,NULL,NULL,&lenI[0],&lenI[1],NULL);
613: DMDAGetCorners(dm,&startI[0],&startI[1],NULL,&endI[0],&endI[1],NULL);
614: endI[0] += startI[0];
615: endI[1] += startI[1];
617: for (j=startI[1]; j<endI[1]; j++) {
618: for (i=startI[0]; i<endI[0]; i++) {
619: PetscMPIInt rank_ijk_re,rank_reI[3];
620: PetscInt s0_re;
621: PetscInt ii,jj,local_ijk_re,mapped_ijk;
622: PetscInt lenI_re[3];
624: location = (i - startI[0]) + (j - startI[1])*lenI[0];
625: _DMDADetermineRankFromGlobalIJK(2,i,j,0, ctx->Mp_re,ctx->Np_re,ctx->Pp_re,
626: ctx->start_i_re,ctx->start_j_re,ctx->start_k_re,
627: ctx->range_i_re,ctx->range_j_re,ctx->range_k_re,
628: &rank_reI[0],&rank_reI[1],NULL,&rank_ijk_re);
630: _DMDADetermineGlobalS0(2,rank_ijk_re, ctx->Mp_re,ctx->Np_re,ctx->Pp_re, ctx->range_i_re,ctx->range_j_re,ctx->range_k_re, &s0_re);
632: ii = i - ctx->start_i_re[ rank_reI[0] ];
633: if (ii < 0) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_USER,"[dmdarepart-perm2d] index error ii");
634: jj = j - ctx->start_j_re[ rank_reI[1] ];
635: if (jj < 0) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_USER,"[dmdarepart-perm2d] index error jj");
637: lenI_re[0] = ctx->range_i_re[ rank_reI[0] ];
638: lenI_re[1] = ctx->range_j_re[ rank_reI[1] ];
639: local_ijk_re = ii + jj * lenI_re[0];
640: mapped_ijk = s0_re + local_ijk_re;
641: MatSetValue(Pscalar,sr+location,mapped_ijk,1.0,INSERT_VALUES);
642: }
643: }
644: MatAssemblyBegin(Pscalar,MAT_FINAL_ASSEMBLY);
645: MatAssemblyEnd(Pscalar,MAT_FINAL_ASSEMBLY);
646: MatCreateMAIJ(Pscalar,ndof,&P);
647: MatDestroy(&Pscalar);
648: ctx->permutation = P;
649: return(0);
650: }
652: PetscErrorCode PCTelescopeSetUp_dmda_scatters(PC pc,PC_Telescope sred,PC_Telescope_DMDACtx *ctx)
653: {
655: Vec xred,yred,xtmp,x,xp;
656: VecScatter scatter;
657: IS isin;
658: Mat B;
659: PetscInt m,bs,st,ed;
660: MPI_Comm comm;
663: PetscObjectGetComm((PetscObject)pc,&comm);
664: PCGetOperators(pc,NULL,&B);
665: MatCreateVecs(B,&x,NULL);
666: MatGetBlockSize(B,&bs);
667: VecDuplicate(x,&xp);
668: m = 0;
669: xred = NULL;
670: yred = NULL;
671: if (PCTelescope_isActiveRank(sred)) {
672: DMCreateGlobalVector(ctx->dmrepart,&xred);
673: VecDuplicate(xred,&yred);
674: VecGetOwnershipRange(xred,&st,&ed);
675: ISCreateStride(comm,ed-st,st,1,&isin);
676: VecGetLocalSize(xred,&m);
677: } else {
678: VecGetOwnershipRange(x,&st,&ed);
679: ISCreateStride(comm,0,st,1,&isin);
680: }
681: ISSetBlockSize(isin,bs);
682: VecCreate(comm,&xtmp);
683: VecSetSizes(xtmp,m,PETSC_DECIDE);
684: VecSetBlockSize(xtmp,bs);
685: VecSetType(xtmp,((PetscObject)x)->type_name);
686: VecScatterCreate(x,isin,xtmp,NULL,&scatter);
687: sred->xred = xred;
688: sred->yred = yred;
689: sred->isin = isin;
690: sred->scatter = scatter;
691: sred->xtmp = xtmp;
693: ctx->xp = xp;
694: VecDestroy(&x);
695: return(0);
696: }
698: PetscErrorCode PCTelescopeSetUp_dmda(PC pc,PC_Telescope sred)
699: {
700: PC_Telescope_DMDACtx *ctx;
701: PetscInt dim;
702: DM dm;
703: MPI_Comm comm;
704: PetscErrorCode ierr;
707: PetscInfo(pc,"PCTelescope: setup (DMDA)\n");
708: PetscNew(&ctx);
709: sred->dm_ctx = (void*)ctx;
711: PetscObjectGetComm((PetscObject)pc,&comm);
712: PCGetDM(pc,&dm);
713: DMDAGetInfo(dm,&dim,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
715: PCTelescopeSetUp_dmda_repart(pc,sred,ctx);
716: PCTelescopeSetUp_dmda_repart_coors(pc,sred,ctx);
717: switch (dim) {
718: case 1: SETERRQ(comm,PETSC_ERR_SUP,"Telescope: DMDA (1D) repartitioning not provided");
719: break;
720: case 2: PCTelescopeSetUp_dmda_permutation_2d(pc,sred,ctx);
721: break;
722: case 3: PCTelescopeSetUp_dmda_permutation_3d(pc,sred,ctx);
723: break;
724: }
725: PCTelescopeSetUp_dmda_scatters(pc,sred,ctx);
726: return(0);
727: }
729: PetscErrorCode PCTelescopeMatCreate_dmda_dmactivefalse(PC pc,PC_Telescope sred,MatReuse reuse,Mat *A)
730: {
731: PetscErrorCode ierr;
732: PC_Telescope_DMDACtx *ctx;
733: MPI_Comm comm,subcomm;
734: Mat Bperm,Bred,B,P;
735: PetscInt nr,nc;
736: IS isrow,iscol;
737: Mat Blocal,*_Blocal;
740: PetscInfo(pc,"PCTelescope: updating the redundant preconditioned operator (DMDA)\n");
741: PetscObjectGetComm((PetscObject)pc,&comm);
742: subcomm = PetscSubcommChild(sred->psubcomm);
743: ctx = (PC_Telescope_DMDACtx*)sred->dm_ctx;
745: PCGetOperators(pc,NULL,&B);
746: MatGetSize(B,&nr,&nc);
748: P = ctx->permutation;
749: MatPtAP(B,P,MAT_INITIAL_MATRIX,1.1,&Bperm);
751: /* Get submatrices */
752: isrow = sred->isin;
753: ISCreateStride(comm,nc,0,1,&iscol);
755: MatCreateSubMatrices(Bperm,1,&isrow,&iscol,MAT_INITIAL_MATRIX,&_Blocal);
756: Blocal = *_Blocal;
757: Bred = NULL;
758: if (PCTelescope_isActiveRank(sred)) {
759: PetscInt mm;
761: if (reuse != MAT_INITIAL_MATRIX) {Bred = *A;}
762: MatGetSize(Blocal,&mm,NULL);
763: /* MatCreateMPIMatConcatenateSeqMat(subcomm,Blocal,PETSC_DECIDE,reuse,&Bred); */
764: MatCreateMPIMatConcatenateSeqMat(subcomm,Blocal,mm,reuse,&Bred);
765: }
766: *A = Bred;
768: ISDestroy(&iscol);
769: MatDestroy(&Bperm);
770: MatDestroyMatrices(1,&_Blocal);
771: return(0);
772: }
774: PetscErrorCode PCTelescopeMatCreate_dmda(PC pc,PC_Telescope sred,MatReuse reuse,Mat *A)
775: {
777: DM dm;
778: PetscErrorCode (*dmksp_func)(KSP,Mat,Mat,void*);
779: void *dmksp_ctx;
782: PCGetDM(pc,&dm);
783: DMKSPGetComputeOperators(dm,&dmksp_func,&dmksp_ctx);
784: /* We assume that dmksp_func = NULL, is equivalent to dmActive = PETSC_FALSE */
785: if (dmksp_func && !sred->ignore_kspcomputeoperators) {
786: DM dmrepart;
787: Mat Ak;
789: *A = NULL;
790: if (PCTelescope_isActiveRank(sred)) {
791: KSPGetDM(sred->ksp,&dmrepart);
792: if (reuse == MAT_INITIAL_MATRIX) {
793: DMCreateMatrix(dmrepart,&Ak);
794: *A = Ak;
795: } else if (reuse == MAT_REUSE_MATRIX) {
796: Ak = *A;
797: }
798: /*
799: There is no need to explicitly assemble the operator now,
800: the sub-KSP will call the method provided to KSPSetComputeOperators() during KSPSetUp()
801: */
802: }
803: } else {
804: PCTelescopeMatCreate_dmda_dmactivefalse(pc,sred,reuse,A);
805: }
806: return(0);
807: }
809: PetscErrorCode PCTelescopeSubNullSpaceCreate_dmda_Telescope(PC pc,PC_Telescope sred,MatNullSpace nullspace,MatNullSpace *sub_nullspace)
810: {
811: PetscErrorCode ierr;
812: PetscBool has_const;
813: PetscInt i,k,n = 0;
814: const Vec *vecs;
815: Vec *sub_vecs = NULL;
816: MPI_Comm subcomm;
817: PC_Telescope_DMDACtx *ctx;
820: ctx = (PC_Telescope_DMDACtx*)sred->dm_ctx;
821: subcomm = PetscSubcommChild(sred->psubcomm);
822: MatNullSpaceGetVecs(nullspace,&has_const,&n,&vecs);
824: if (PCTelescope_isActiveRank(sred)) {
825: /* create new vectors */
826: if (n) {
827: VecDuplicateVecs(sred->xred,n,&sub_vecs);
828: }
829: }
831: /* copy entries */
832: for (k=0; k<n; k++) {
833: const PetscScalar *x_array;
834: PetscScalar *LA_sub_vec;
835: PetscInt st,ed;
837: /* permute vector into ordering associated with re-partitioned dmda */
838: MatMultTranspose(ctx->permutation,vecs[k],ctx->xp);
840: /* pull in vector x->xtmp */
841: VecScatterBegin(sred->scatter,ctx->xp,sred->xtmp,INSERT_VALUES,SCATTER_FORWARD);
842: VecScatterEnd(sred->scatter,ctx->xp,sred->xtmp,INSERT_VALUES,SCATTER_FORWARD);
844: /* copy vector entries into xred */
845: VecGetArrayRead(sred->xtmp,&x_array);
846: if (sub_vecs) {
847: if (sub_vecs[k]) {
848: VecGetOwnershipRange(sub_vecs[k],&st,&ed);
849: VecGetArray(sub_vecs[k],&LA_sub_vec);
850: for (i=0; i<ed-st; i++) {
851: LA_sub_vec[i] = x_array[i];
852: }
853: VecRestoreArray(sub_vecs[k],&LA_sub_vec);
854: }
855: }
856: VecRestoreArrayRead(sred->xtmp,&x_array);
857: }
859: if (PCTelescope_isActiveRank(sred)) {
860: /* create new (near) nullspace for redundant object */
861: MatNullSpaceCreate(subcomm,has_const,n,sub_vecs,sub_nullspace);
862: VecDestroyVecs(n,&sub_vecs);
863: if (nullspace->remove) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Propagation of custom remove callbacks not supported when propagating (near) nullspaces with PCTelescope");
864: if (nullspace->rmctx) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Propagation of custom remove callback context not supported when propagating (near) nullspaces with PCTelescope");
865: }
866: return(0);
867: }
869: PetscErrorCode PCTelescopeMatNullSpaceCreate_dmda(PC pc,PC_Telescope sred,Mat sub_mat)
870: {
872: Mat B;
875: PCGetOperators(pc,NULL,&B);
876: {
877: MatNullSpace nullspace,sub_nullspace;
878: MatGetNullSpace(B,&nullspace);
879: if (nullspace) {
880: PetscInfo(pc,"PCTelescope: generating nullspace (DMDA)\n");
881: PCTelescopeSubNullSpaceCreate_dmda_Telescope(pc,sred,nullspace,&sub_nullspace);
882: if (PCTelescope_isActiveRank(sred)) {
883: MatSetNullSpace(sub_mat,sub_nullspace);
884: MatNullSpaceDestroy(&sub_nullspace);
885: }
886: }
887: }
888: {
889: MatNullSpace nearnullspace,sub_nearnullspace;
890: MatGetNearNullSpace(B,&nearnullspace);
891: if (nearnullspace) {
892: PetscInfo(pc,"PCTelescope: generating near nullspace (DMDA)\n");
893: PCTelescopeSubNullSpaceCreate_dmda_Telescope(pc,sred,nearnullspace,&sub_nearnullspace);
894: if (PCTelescope_isActiveRank(sred)) {
895: MatSetNearNullSpace(sub_mat,sub_nearnullspace);
896: MatNullSpaceDestroy(&sub_nearnullspace);
897: }
898: }
899: }
900: return(0);
901: }
903: PetscErrorCode PCApply_Telescope_dmda(PC pc,Vec x,Vec y)
904: {
905: PC_Telescope sred = (PC_Telescope)pc->data;
906: PetscErrorCode ierr;
907: Mat perm;
908: Vec xtmp,xp,xred,yred;
909: PetscInt i,st,ed;
910: VecScatter scatter;
911: PetscScalar *array;
912: const PetscScalar *x_array;
913: PC_Telescope_DMDACtx *ctx;
915: ctx = (PC_Telescope_DMDACtx*)sred->dm_ctx;
916: xtmp = sred->xtmp;
917: scatter = sred->scatter;
918: xred = sred->xred;
919: yred = sred->yred;
920: perm = ctx->permutation;
921: xp = ctx->xp;
924: PetscCitationsRegister(citation,&cited);
926: /* permute vector into ordering associated with re-partitioned dmda */
927: MatMultTranspose(perm,x,xp);
929: /* pull in vector x->xtmp */
930: VecScatterBegin(scatter,xp,xtmp,INSERT_VALUES,SCATTER_FORWARD);
931: VecScatterEnd(scatter,xp,xtmp,INSERT_VALUES,SCATTER_FORWARD);
933: /* copy vector entires into xred */
934: VecGetArrayRead(xtmp,&x_array);
935: if (xred) {
936: PetscScalar *LA_xred;
937: VecGetOwnershipRange(xred,&st,&ed);
939: VecGetArray(xred,&LA_xred);
940: for (i=0; i<ed-st; i++) {
941: LA_xred[i] = x_array[i];
942: }
943: VecRestoreArray(xred,&LA_xred);
944: }
945: VecRestoreArrayRead(xtmp,&x_array);
947: /* solve */
948: if (PCTelescope_isActiveRank(sred)) {
949: KSPSolve(sred->ksp,xred,yred);
950: KSPCheckSolve(sred->ksp,pc,yred);
951: }
953: /* return vector */
954: VecGetArray(xtmp,&array);
955: if (yred) {
956: const PetscScalar *LA_yred;
957: VecGetOwnershipRange(yred,&st,&ed);
958: VecGetArrayRead(yred,&LA_yred);
959: for (i=0; i<ed-st; i++) {
960: array[i] = LA_yred[i];
961: }
962: VecRestoreArrayRead(yred,&LA_yred);
963: }
964: VecRestoreArray(xtmp,&array);
965: VecScatterBegin(scatter,xtmp,xp,INSERT_VALUES,SCATTER_REVERSE);
966: VecScatterEnd(scatter,xtmp,xp,INSERT_VALUES,SCATTER_REVERSE);
967: MatMult(perm,xp,y);
968: return(0);
969: }
971: PetscErrorCode PCApplyRichardson_Telescope_dmda(PC pc,Vec x,Vec y,Vec w,PetscReal rtol,PetscReal abstol, PetscReal dtol,PetscInt its,PetscBool zeroguess,PetscInt *outits,PCRichardsonConvergedReason *reason)
972: {
973: PC_Telescope sred = (PC_Telescope)pc->data;
974: PetscErrorCode ierr;
975: Mat perm;
976: Vec xtmp,xp,yred;
977: PetscInt i,st,ed;
978: VecScatter scatter;
979: const PetscScalar *x_array;
980: PetscBool default_init_guess_value = PETSC_FALSE;
981: PC_Telescope_DMDACtx *ctx;
984: ctx = (PC_Telescope_DMDACtx*)sred->dm_ctx;
985: xtmp = sred->xtmp;
986: scatter = sred->scatter;
987: yred = sred->yred;
988: perm = ctx->permutation;
989: xp = ctx->xp;
991: if (its > 1) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"PCApplyRichardson_Telescope_dmda only supports max_it = 1");
992: *reason = (PCRichardsonConvergedReason)0;
994: if (!zeroguess) {
995: PetscInfo(pc,"PCTelescopeDMDA: Scattering y for non-zero-initial guess\n");
996: /* permute vector into ordering associated with re-partitioned dmda */
997: MatMultTranspose(perm,y,xp);
999: /* pull in vector x->xtmp */
1000: VecScatterBegin(scatter,xp,xtmp,INSERT_VALUES,SCATTER_FORWARD);
1001: VecScatterEnd(scatter,xp,xtmp,INSERT_VALUES,SCATTER_FORWARD);
1003: /* copy vector entires into xred */
1004: VecGetArrayRead(xtmp,&x_array);
1005: if (yred) {
1006: PetscScalar *LA_yred;
1007: VecGetOwnershipRange(yred,&st,&ed);
1008: VecGetArray(yred,&LA_yred);
1009: for (i=0; i<ed-st; i++) {
1010: LA_yred[i] = x_array[i];
1011: }
1012: VecRestoreArray(yred,&LA_yred);
1013: }
1014: VecRestoreArrayRead(xtmp,&x_array);
1015: }
1017: if (PCTelescope_isActiveRank(sred)) {
1018: KSPGetInitialGuessNonzero(sred->ksp,&default_init_guess_value);
1019: if (!zeroguess) KSPSetInitialGuessNonzero(sred->ksp,PETSC_TRUE);
1020: }
1022: PCApply_Telescope_dmda(pc,x,y);
1024: if (PCTelescope_isActiveRank(sred)) {
1025: KSPSetInitialGuessNonzero(sred->ksp,default_init_guess_value);
1026: }
1028: if (!*reason) *reason = PCRICHARDSON_CONVERGED_ITS;
1029: *outits = 1;
1030: return(0);
1031: }
1033: PetscErrorCode PCReset_Telescope_dmda(PC pc)
1034: {
1035: PetscErrorCode ierr;
1036: PC_Telescope sred = (PC_Telescope)pc->data;
1037: PC_Telescope_DMDACtx *ctx;
1040: ctx = (PC_Telescope_DMDACtx*)sred->dm_ctx;
1041: VecDestroy(&ctx->xp);
1042: MatDestroy(&ctx->permutation);
1043: DMDestroy(&ctx->dmrepart);
1044: PetscFree3(ctx->range_i_re,ctx->range_j_re,ctx->range_k_re);
1045: PetscFree3(ctx->start_i_re,ctx->start_j_re,ctx->start_k_re);
1046: return(0);
1047: }
1049: PetscErrorCode DMView_DA_Short_3d(DM dm,PetscViewer v)
1050: {
1051: PetscInt M,N,P,m,n,p,ndof,nsw;
1052: MPI_Comm comm;
1053: PetscMPIInt size;
1054: const char* prefix;
1058: PetscObjectGetComm((PetscObject)dm,&comm);
1059: MPI_Comm_size(comm,&size);
1060: DMGetOptionsPrefix(dm,&prefix);
1061: DMDAGetInfo(dm,NULL,&M,&N,&P,&m,&n,&p,&ndof,&nsw,NULL,NULL,NULL,NULL);
1062: if (prefix) {PetscViewerASCIIPrintf(v,"DMDA Object: (%s) %d MPI processes\n",prefix,size);}
1063: else {PetscViewerASCIIPrintf(v,"DMDA Object: %d MPI processes\n",size);}
1064: PetscViewerASCIIPrintf(v," M %D N %D P %D m %D n %D p %D dof %D overlap %D\n",M,N,P,m,n,p,ndof,nsw);
1065: return(0);
1066: }
1068: PetscErrorCode DMView_DA_Short_2d(DM dm,PetscViewer v)
1069: {
1070: PetscInt M,N,m,n,ndof,nsw;
1071: MPI_Comm comm;
1072: PetscMPIInt size;
1073: const char* prefix;
1077: PetscObjectGetComm((PetscObject)dm,&comm);
1078: MPI_Comm_size(comm,&size);
1079: DMGetOptionsPrefix(dm,&prefix);
1080: DMDAGetInfo(dm,NULL,&M,&N,NULL,&m,&n,NULL,&ndof,&nsw,NULL,NULL,NULL,NULL);
1081: if (prefix) {PetscViewerASCIIPrintf(v,"DMDA Object: (%s) %d MPI processes\n",prefix,size);}
1082: else {PetscViewerASCIIPrintf(v,"DMDA Object: %d MPI processes\n",size);}
1083: PetscViewerASCIIPrintf(v," M %D N %D m %D n %D dof %D overlap %D\n",M,N,m,n,ndof,nsw);
1084: return(0);
1085: }
1087: PetscErrorCode DMView_DA_Short(DM dm,PetscViewer v)
1088: {
1090: PetscInt dim;
1093: DMDAGetInfo(dm,&dim,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
1094: switch (dim) {
1095: case 2: DMView_DA_Short_2d(dm,v);
1096: break;
1097: case 3: DMView_DA_Short_3d(dm,v);
1098: break;
1099: }
1100: return(0);
1101: }