1 2 /*************************************xyt.c************************************ 3 Module Name: xyt 4 Module Info: 5 6 author: Henry M. Tufo III 7 e-mail: hmt@asci.uchicago.edu 8 contact: 9 +--------------------------------+--------------------------------+ 10 |MCS Division - Building 221 |Department of Computer Science | 11 |Argonne National Laboratory |Ryerson 152 | 12 |9700 S. Cass Avenue |The University of Chicago | 13 |Argonne, IL 60439 |Chicago, IL 60637 | 14 |(630) 252-5354/5986 ph/fx |(773) 702-6019/8487 ph/fx | 15 +--------------------------------+--------------------------------+ 16 17 Last Modification: 3.20.01 18 **************************************xyt.c***********************************/ 19 #include <../src/ksp/pc/impls/tfs/tfs.h> 20 21 #define LEFT -1 22 #define RIGHT 1 23 #define BOTH 0 24 25 typedef struct xyt_solver_info { 26 PetscInt n, m, n_global, m_global; 27 PetscInt nnz, max_nnz, msg_buf_sz; 28 PetscInt *nsep, *lnsep, *fo, nfo, *stages; 29 PetscInt *xcol_sz, *xcol_indices; 30 PetscScalar **xcol_vals, *x, *solve_uu, *solve_w; 31 PetscInt *ycol_sz, *ycol_indices; 32 PetscScalar **ycol_vals, *y; 33 PetscInt nsolves; 34 PetscScalar tot_solve_time; 35 } xyt_info; 36 37 typedef struct matvec_info { 38 PetscInt n, m, n_global, m_global; 39 PetscInt *local2global; 40 PCTFS_gs_ADT PCTFS_gs_handle; 41 PetscErrorCode (*matvec)(struct matvec_info*,PetscScalar*,PetscScalar*); 42 void *grid_data; 43 } mv_info; 44 45 struct xyt_CDT { 46 PetscInt id; 47 PetscInt ns; 48 PetscInt level; 49 xyt_info *info; 50 mv_info *mvi; 51 }; 52 53 static PetscInt n_xyt =0; 54 static PetscInt n_xyt_handles=0; 55 56 /* prototypes */ 57 static PetscErrorCode do_xyt_solve(xyt_ADT xyt_handle, PetscScalar *rhs); 58 static PetscErrorCode check_handle(xyt_ADT xyt_handle); 59 static PetscErrorCode det_separators(xyt_ADT xyt_handle); 60 static PetscErrorCode do_matvec(mv_info *A, PetscScalar *v, PetscScalar *u); 61 static PetscErrorCode xyt_generate(xyt_ADT xyt_handle); 62 static PetscErrorCode do_xyt_factor(xyt_ADT xyt_handle); 63 static mv_info *set_mvi(PetscInt *local2global, PetscInt n, PetscInt m, PetscErrorCode (*matvec)(mv_info*,PetscScalar*,PetscScalar*), void *grid_data); 64 65 /**************************************xyt.c***********************************/ 66 xyt_ADT XYT_new(void) 67 { 68 xyt_ADT xyt_handle; 69 70 /* rolling count on n_xyt ... pot. problem here */ 71 n_xyt_handles++; 72 xyt_handle = (xyt_ADT)malloc(sizeof(struct xyt_CDT)); 73 xyt_handle->id = ++n_xyt; 74 xyt_handle->info = NULL; 75 xyt_handle->mvi = NULL; 76 77 return(xyt_handle); 78 } 79 80 /**************************************xyt.c***********************************/ 81 PetscErrorCode XYT_factor(xyt_ADT xyt_handle, /* prev. allocated xyt handle */ 82 PetscInt *local2global, /* global column mapping */ 83 PetscInt n, /* local num rows */ 84 PetscInt m, /* local num cols */ 85 PetscErrorCode (*matvec)(void*,PetscScalar*,PetscScalar*), /* b_loc=A_local.x_loc */ 86 void *grid_data) /* grid data for matvec */ 87 { 88 89 PCTFS_comm_init(); 90 check_handle(xyt_handle); 91 92 /* only 2^k for now and all nodes participating */ 93 if ((1<<(xyt_handle->level=PCTFS_i_log2_num_nodes))!=PCTFS_num_nodes) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_PLIB,"only 2^k for now and MPI_COMM_WORLD!!! %D != %D\n",1<<PCTFS_i_log2_num_nodes,PCTFS_num_nodes); 94 95 /* space for X info */ 96 xyt_handle->info = (xyt_info*)malloc(sizeof(xyt_info)); 97 98 /* set up matvec handles */ 99 xyt_handle->mvi = set_mvi(local2global, n, m, (PetscErrorCode (*)(mv_info*,PetscScalar*,PetscScalar*))matvec, grid_data); 100 101 /* matrix is assumed to be of full rank */ 102 /* LATER we can reset to indicate rank def. */ 103 xyt_handle->ns=0; 104 105 /* determine separators and generate firing order - NB xyt info set here */ 106 det_separators(xyt_handle); 107 108 return(do_xyt_factor(xyt_handle)); 109 } 110 111 /**************************************xyt.c***********************************/ 112 PetscErrorCode XYT_solve(xyt_ADT xyt_handle, PetscScalar *x, PetscScalar *b) 113 { 114 PCTFS_comm_init(); 115 check_handle(xyt_handle); 116 117 /* need to copy b into x? */ 118 if (b) PCTFS_rvec_copy(x,b,xyt_handle->mvi->n); 119 return do_xyt_solve(xyt_handle,x); 120 } 121 122 /**************************************xyt.c***********************************/ 123 PetscErrorCode XYT_free(xyt_ADT xyt_handle) 124 { 125 PCTFS_comm_init(); 126 check_handle(xyt_handle); 127 n_xyt_handles--; 128 129 free(xyt_handle->info->nsep); 130 free(xyt_handle->info->lnsep); 131 free(xyt_handle->info->fo); 132 free(xyt_handle->info->stages); 133 free(xyt_handle->info->solve_uu); 134 free(xyt_handle->info->solve_w); 135 free(xyt_handle->info->x); 136 free(xyt_handle->info->xcol_vals); 137 free(xyt_handle->info->xcol_sz); 138 free(xyt_handle->info->xcol_indices); 139 free(xyt_handle->info->y); 140 free(xyt_handle->info->ycol_vals); 141 free(xyt_handle->info->ycol_sz); 142 free(xyt_handle->info->ycol_indices); 143 free(xyt_handle->info); 144 free(xyt_handle->mvi->local2global); 145 PCTFS_gs_free(xyt_handle->mvi->PCTFS_gs_handle); 146 free(xyt_handle->mvi); 147 free(xyt_handle); 148 149 /* if the check fails we nuke */ 150 /* if NULL pointer passed to free we nuke */ 151 /* if the calls to free fail that's not my problem */ 152 return(0); 153 } 154 155 /**************************************xyt.c***********************************/ 156 PetscErrorCode XYT_stats(xyt_ADT xyt_handle) 157 { 158 PetscInt op[] = {NON_UNIFORM,GL_MIN,GL_MAX,GL_ADD,GL_MIN,GL_MAX,GL_ADD,GL_MIN,GL_MAX,GL_ADD}; 159 PetscInt fop[] = {NON_UNIFORM,GL_MIN,GL_MAX,GL_ADD}; 160 PetscInt vals[9], work[9]; 161 PetscScalar fvals[3], fwork[3]; 162 163 PCTFS_comm_init(); 164 check_handle(xyt_handle); 165 166 /* if factorization not done there are no stats */ 167 if (!xyt_handle->info||!xyt_handle->mvi) { 168 if (!PCTFS_my_id) PetscPrintf(PETSC_COMM_WORLD,"XYT_stats() :: no stats available!\n"); 169 return 1; 170 } 171 172 vals[0]=vals[1]=vals[2]=xyt_handle->info->nnz; 173 vals[3]=vals[4]=vals[5]=xyt_handle->mvi->n; 174 vals[6]=vals[7]=vals[8]=xyt_handle->info->msg_buf_sz; 175 PCTFS_giop(vals,work,sizeof(op)/sizeof(op[0])-1,op); 176 177 fvals[0]=fvals[1]=fvals[2]=xyt_handle->info->tot_solve_time/xyt_handle->info->nsolves++; 178 PCTFS_grop(fvals,fwork,sizeof(fop)/sizeof(fop[0])-1,fop); 179 180 if (!PCTFS_my_id) { 181 PetscPrintf(PETSC_COMM_WORLD,"%D :: min xyt_nnz=%D\n",PCTFS_my_id,vals[0]); 182 PetscPrintf(PETSC_COMM_WORLD,"%D :: max xyt_nnz=%D\n",PCTFS_my_id,vals[1]); 183 PetscPrintf(PETSC_COMM_WORLD,"%D :: avg xyt_nnz=%g\n",PCTFS_my_id,1.0*vals[2]/PCTFS_num_nodes); 184 PetscPrintf(PETSC_COMM_WORLD,"%D :: tot xyt_nnz=%D\n",PCTFS_my_id,vals[2]); 185 PetscPrintf(PETSC_COMM_WORLD,"%D :: xyt C(2d) =%g\n",PCTFS_my_id,vals[2]/(PetscPowReal(1.0*vals[5],1.5))); 186 PetscPrintf(PETSC_COMM_WORLD,"%D :: xyt C(3d) =%g\n",PCTFS_my_id,vals[2]/(PetscPowReal(1.0*vals[5],1.6667))); 187 PetscPrintf(PETSC_COMM_WORLD,"%D :: min xyt_n =%D\n",PCTFS_my_id,vals[3]); 188 PetscPrintf(PETSC_COMM_WORLD,"%D :: max xyt_n =%D\n",PCTFS_my_id,vals[4]); 189 PetscPrintf(PETSC_COMM_WORLD,"%D :: avg xyt_n =%g\n",PCTFS_my_id,1.0*vals[5]/PCTFS_num_nodes); 190 PetscPrintf(PETSC_COMM_WORLD,"%D :: tot xyt_n =%D\n",PCTFS_my_id,vals[5]); 191 PetscPrintf(PETSC_COMM_WORLD,"%D :: min xyt_buf=%D\n",PCTFS_my_id,vals[6]); 192 PetscPrintf(PETSC_COMM_WORLD,"%D :: max xyt_buf=%D\n",PCTFS_my_id,vals[7]); 193 PetscPrintf(PETSC_COMM_WORLD,"%D :: avg xyt_buf=%g\n",PCTFS_my_id,1.0*vals[8]/PCTFS_num_nodes); 194 PetscPrintf(PETSC_COMM_WORLD,"%D :: min xyt_slv=%g\n",PCTFS_my_id,fvals[0]); 195 PetscPrintf(PETSC_COMM_WORLD,"%D :: max xyt_slv=%g\n",PCTFS_my_id,fvals[1]); 196 PetscPrintf(PETSC_COMM_WORLD,"%D :: avg xyt_slv=%g\n",PCTFS_my_id,fvals[2]/PCTFS_num_nodes); 197 } 198 199 return(0); 200 } 201 202 /*************************************xyt.c************************************ 203 204 Description: get A_local, local portion of global coarse matrix which 205 is a row dist. nxm matrix w/ n<m. 206 o my_ml holds address of ML struct associated w/A_local and coarse grid 207 o local2global holds global number of column i (i=0,...,m-1) 208 o local2global holds global number of row i (i=0,...,n-1) 209 o mylocmatvec performs A_local . vec_local (note that gs is performed using 210 PCTFS_gs_init/gop). 211 212 mylocmatvec = my_ml->Amat[grid_tag].matvec->external; 213 mylocmatvec (void :: void *data, double *in, double *out) 214 **************************************xyt.c***********************************/ 215 static PetscErrorCode do_xyt_factor(xyt_ADT xyt_handle) 216 { 217 return xyt_generate(xyt_handle); 218 } 219 220 /**************************************xyt.c***********************************/ 221 static PetscErrorCode xyt_generate(xyt_ADT xyt_handle) 222 { 223 PetscInt i,j,k,idx; 224 PetscInt dim, col; 225 PetscScalar *u, *uu, *v, *z, *w, alpha, alpha_w; 226 PetscInt *segs; 227 PetscInt op[] = {GL_ADD,0}; 228 PetscInt off, len; 229 PetscScalar *x_ptr, *y_ptr; 230 PetscInt *iptr, flag; 231 PetscInt start =0, end, work; 232 PetscInt op2[] = {GL_MIN,0}; 233 PCTFS_gs_ADT PCTFS_gs_handle; 234 PetscInt *nsep, *lnsep, *fo; 235 PetscInt a_n =xyt_handle->mvi->n; 236 PetscInt a_m =xyt_handle->mvi->m; 237 PetscInt *a_local2global=xyt_handle->mvi->local2global; 238 PetscInt level; 239 PetscInt n, m; 240 PetscInt *xcol_sz, *xcol_indices, *stages; 241 PetscScalar **xcol_vals, *x; 242 PetscInt *ycol_sz, *ycol_indices; 243 PetscScalar **ycol_vals, *y; 244 PetscInt n_global; 245 PetscInt xt_nnz =0, xt_max_nnz=0; 246 PetscInt yt_nnz =0, yt_max_nnz=0; 247 PetscInt xt_zero_nnz =0; 248 PetscInt xt_zero_nnz_0=0; 249 PetscInt yt_zero_nnz =0; 250 PetscInt yt_zero_nnz_0=0; 251 PetscBLASInt i1 = 1,dlen; 252 PetscScalar dm1 = -1.0; 253 PetscErrorCode ierr; 254 255 n =xyt_handle->mvi->n; 256 nsep =xyt_handle->info->nsep; 257 lnsep =xyt_handle->info->lnsep; 258 fo =xyt_handle->info->fo; 259 end =lnsep[0]; 260 level =xyt_handle->level; 261 PCTFS_gs_handle=xyt_handle->mvi->PCTFS_gs_handle; 262 263 /* is there a null space? */ 264 /* LATER add in ability to detect null space by checking alpha */ 265 for (i=0, j=0; i<=level; i++) j+=nsep[i]; 266 267 m = j-xyt_handle->ns; 268 if (m!=j) { 269 ierr = PetscPrintf(PETSC_COMM_WORLD,"xyt_generate() :: null space exists %D %D %D\n",m,j,xyt_handle->ns);CHKERRQ(ierr); 270 } 271 272 ierr = PetscInfo2(0,"xyt_generate() :: X(%D,%D)\n",n,m);CHKERRQ(ierr); 273 274 /* get and initialize storage for x local */ 275 /* note that x local is nxm and stored by columns */ 276 xcol_sz = (PetscInt*) malloc(m*sizeof(PetscInt)); 277 xcol_indices = (PetscInt*) malloc((2*m+1)*sizeof(PetscInt)); 278 xcol_vals = (PetscScalar**) malloc(m*sizeof(PetscScalar*)); 279 for (i=j=0; i<m; i++, j+=2) { 280 xcol_indices[j]=xcol_indices[j+1]=xcol_sz[i]=-1; 281 xcol_vals[i] = NULL; 282 } 283 xcol_indices[j]=-1; 284 285 /* get and initialize storage for y local */ 286 /* note that y local is nxm and stored by columns */ 287 ycol_sz = (PetscInt*) malloc(m*sizeof(PetscInt)); 288 ycol_indices = (PetscInt*) malloc((2*m+1)*sizeof(PetscInt)); 289 ycol_vals = (PetscScalar**) malloc(m*sizeof(PetscScalar*)); 290 for (i=j=0; i<m; i++, j+=2) { 291 ycol_indices[j]=ycol_indices[j+1]=ycol_sz[i]=-1; 292 ycol_vals[i] = NULL; 293 } 294 ycol_indices[j]=-1; 295 296 /* size of separators for each sub-hc working from bottom of tree to top */ 297 /* this looks like nsep[]=segments */ 298 stages = (PetscInt*) malloc((level+1)*sizeof(PetscInt)); 299 segs = (PetscInt*) malloc((level+1)*sizeof(PetscInt)); 300 PCTFS_ivec_zero(stages,level+1); 301 PCTFS_ivec_copy(segs,nsep,level+1); 302 for (i=0; i<level; i++) segs[i+1] += segs[i]; 303 stages[0] = segs[0]; 304 305 /* temporary vectors */ 306 u = (PetscScalar*) malloc(n*sizeof(PetscScalar)); 307 z = (PetscScalar*) malloc(n*sizeof(PetscScalar)); 308 v = (PetscScalar*) malloc(a_m*sizeof(PetscScalar)); 309 uu = (PetscScalar*) malloc(m*sizeof(PetscScalar)); 310 w = (PetscScalar*) malloc(m*sizeof(PetscScalar)); 311 312 /* extra nnz due to replication of vertices across separators */ 313 for (i=1, j=0; i<=level; i++) j+=nsep[i]; 314 315 /* storage for sparse x values */ 316 n_global = xyt_handle->info->n_global; 317 xt_max_nnz = yt_max_nnz = (PetscInt)(2.5*PetscPowReal(1.0*n_global,1.6667) + j*n/2)/PCTFS_num_nodes; 318 x = (PetscScalar*) malloc(xt_max_nnz*sizeof(PetscScalar)); 319 y = (PetscScalar*) malloc(yt_max_nnz*sizeof(PetscScalar)); 320 321 /* LATER - can embed next sep to fire in gs */ 322 /* time to make the donuts - generate X factor */ 323 for (dim=i=j=0; i<m; i++) { 324 /* time to move to the next level? */ 325 while (i==segs[dim]) { 326 if (dim==level) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"dim about to exceed level\n"); 327 stages[dim++]=i; 328 end +=lnsep[dim]; 329 } 330 stages[dim]=i; 331 332 /* which column are we firing? */ 333 /* i.e. set v_l */ 334 /* use new seps and do global min across hc to determine which one to fire */ 335 (start<end) ? (col=fo[start]) : (col=INT_MAX); 336 PCTFS_giop_hc(&col,&work,1,op2,dim); 337 338 /* shouldn't need this */ 339 if (col==INT_MAX) { 340 ierr = PetscInfo(0,"hey ... col==INT_MAX??\n");CHKERRQ(ierr); 341 continue; 342 } 343 344 /* do I own it? I should */ 345 PCTFS_rvec_zero(v,a_m); 346 if (col==fo[start]) { 347 start++; 348 idx=PCTFS_ivec_linear_search(col, a_local2global, a_n); 349 if (idx!=-1) { 350 v[idx] = 1.0; 351 j++; 352 } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"NOT FOUND!\n"); 353 } else { 354 idx=PCTFS_ivec_linear_search(col, a_local2global, a_m); 355 if (idx!=-1) v[idx] = 1.0; 356 } 357 358 /* perform u = A.v_l */ 359 PCTFS_rvec_zero(u,n); 360 do_matvec(xyt_handle->mvi,v,u); 361 362 /* uu = X^T.u_l (local portion) */ 363 /* technically only need to zero out first i entries */ 364 /* later turn this into an XYT_solve call ? */ 365 PCTFS_rvec_zero(uu,m); 366 y_ptr=y; 367 iptr = ycol_indices; 368 for (k=0; k<i; k++) { 369 off = *iptr++; 370 len = *iptr++; 371 ierr = PetscBLASIntCast(len,&dlen);CHKERRQ(ierr); 372 PetscStackCallBLAS("BLASdot",uu[k] = BLASdot_(&dlen,u+off,&i1,y_ptr,&i1)); 373 y_ptr+=len; 374 } 375 376 /* uu = X^T.u_l (comm portion) */ 377 ierr = PCTFS_ssgl_radd (uu, w, dim, stages);CHKERRQ(ierr); 378 379 /* z = X.uu */ 380 PCTFS_rvec_zero(z,n); 381 x_ptr=x; 382 iptr = xcol_indices; 383 for (k=0; k<i; k++) { 384 off = *iptr++; 385 len = *iptr++; 386 ierr = PetscBLASIntCast(len,&dlen);CHKERRQ(ierr); 387 PetscStackCallBLAS("BLASaxpy",BLASaxpy_(&dlen,&uu[k],x_ptr,&i1,z+off,&i1)); 388 x_ptr+=len; 389 } 390 391 /* compute v_l = v_l - z */ 392 PCTFS_rvec_zero(v+a_n,a_m-a_n); 393 ierr = PetscBLASIntCast(n,&dlen);CHKERRQ(ierr); 394 PetscStackCallBLAS("BLASaxpy",BLASaxpy_(&dlen,&dm1,z,&i1,v,&i1)); 395 396 /* compute u_l = A.v_l */ 397 if (a_n!=a_m) PCTFS_gs_gop_hc(PCTFS_gs_handle,v,"+\0",dim); 398 PCTFS_rvec_zero(u,n); 399 do_matvec(xyt_handle->mvi,v,u); 400 401 /* compute sqrt(alpha) = sqrt(u_l^T.u_l) - local portion */ 402 ierr = PetscBLASIntCast(n,&dlen);CHKERRQ(ierr); 403 PetscStackCallBLAS("BLASdot",alpha = BLASdot_(&dlen,u,&i1,u,&i1)); 404 /* compute sqrt(alpha) = sqrt(u_l^T.u_l) - comm portion */ 405 PCTFS_grop_hc(&alpha, &alpha_w, 1, op, dim); 406 407 alpha = (PetscScalar) PetscSqrtReal((PetscReal)alpha); 408 409 /* check for small alpha */ 410 /* LATER use this to detect and determine null space */ 411 if (PetscAbsScalar(alpha)<1.0e-14) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_PLIB,"bad alpha! %g\n",alpha); 412 413 /* compute v_l = v_l/sqrt(alpha) */ 414 PCTFS_rvec_scale(v,1.0/alpha,n); 415 PCTFS_rvec_scale(u,1.0/alpha,n); 416 417 /* add newly generated column, v_l, to X */ 418 flag = 1; 419 off =len=0; 420 for (k=0; k<n; k++) { 421 if (v[k]!=0.0) { 422 len=k; 423 if (flag) {off=k; flag=0;} 424 } 425 } 426 427 len -= (off-1); 428 429 if (len>0) { 430 if ((xt_nnz+len)>xt_max_nnz) { 431 ierr = PetscInfo(0,"increasing space for X by 2x!\n");CHKERRQ(ierr); 432 xt_max_nnz *= 2; 433 x_ptr = (PetscScalar*) malloc(xt_max_nnz*sizeof(PetscScalar)); 434 PCTFS_rvec_copy(x_ptr,x,xt_nnz); 435 free(x); 436 x = x_ptr; 437 x_ptr+=xt_nnz; 438 } 439 xt_nnz += len; 440 PCTFS_rvec_copy(x_ptr,v+off,len); 441 442 /* keep track of number of zeros */ 443 if (dim) { 444 for (k=0; k<len; k++) { 445 if (x_ptr[k]==0.0) xt_zero_nnz++; 446 } 447 } else { 448 for (k=0; k<len; k++) { 449 if (x_ptr[k]==0.0) xt_zero_nnz_0++; 450 } 451 } 452 xcol_indices[2*i] = off; 453 xcol_sz[i] = xcol_indices[2*i+1] = len; 454 xcol_vals[i] = x_ptr; 455 } else { 456 xcol_indices[2*i] = 0; 457 xcol_sz[i] = xcol_indices[2*i+1] = 0; 458 xcol_vals[i] = x_ptr; 459 } 460 461 /* add newly generated column, u_l, to Y */ 462 flag = 1; 463 off =len=0; 464 for (k=0; k<n; k++) { 465 if (u[k]!=0.0) { 466 len=k; 467 if (flag) { off=k; flag=0; } 468 } 469 } 470 471 len -= (off-1); 472 473 if (len>0) { 474 if ((yt_nnz+len)>yt_max_nnz) { 475 ierr = PetscInfo(0,"increasing space for Y by 2x!\n");CHKERRQ(ierr); 476 yt_max_nnz *= 2; 477 y_ptr = (PetscScalar*) malloc(yt_max_nnz*sizeof(PetscScalar)); 478 PCTFS_rvec_copy(y_ptr,y,yt_nnz); 479 free(y); 480 y = y_ptr; 481 y_ptr+=yt_nnz; 482 } 483 yt_nnz += len; 484 PCTFS_rvec_copy(y_ptr,u+off,len); 485 486 /* keep track of number of zeros */ 487 if (dim) { 488 for (k=0; k<len; k++) { 489 if (y_ptr[k]==0.0) yt_zero_nnz++; 490 } 491 } else { 492 for (k=0; k<len; k++) { 493 if (y_ptr[k]==0.0) yt_zero_nnz_0++; 494 } 495 } 496 ycol_indices[2*i] = off; 497 ycol_sz[i] = ycol_indices[2*i+1] = len; 498 ycol_vals[i] = y_ptr; 499 } else { 500 ycol_indices[2*i] = 0; 501 ycol_sz[i] = ycol_indices[2*i+1] = 0; 502 ycol_vals[i] = y_ptr; 503 } 504 } 505 506 /* close off stages for execution phase */ 507 while (dim!=level) { 508 stages[dim++]=i; 509 ierr = PetscInfo2(0,"disconnected!!! dim(%D)!=level(%D)\n",dim,level);CHKERRQ(ierr); 510 } 511 stages[dim]=i; 512 513 xyt_handle->info->n =xyt_handle->mvi->n; 514 xyt_handle->info->m =m; 515 xyt_handle->info->nnz =xt_nnz + yt_nnz; 516 xyt_handle->info->max_nnz =xt_max_nnz + yt_max_nnz; 517 xyt_handle->info->msg_buf_sz =stages[level]-stages[0]; 518 xyt_handle->info->solve_uu = (PetscScalar*) malloc(m*sizeof(PetscScalar)); 519 xyt_handle->info->solve_w = (PetscScalar*) malloc(m*sizeof(PetscScalar)); 520 xyt_handle->info->x =x; 521 xyt_handle->info->xcol_vals =xcol_vals; 522 xyt_handle->info->xcol_sz =xcol_sz; 523 xyt_handle->info->xcol_indices=xcol_indices; 524 xyt_handle->info->stages =stages; 525 xyt_handle->info->y =y; 526 xyt_handle->info->ycol_vals =ycol_vals; 527 xyt_handle->info->ycol_sz =ycol_sz; 528 xyt_handle->info->ycol_indices=ycol_indices; 529 530 free(segs); 531 free(u); 532 free(v); 533 free(uu); 534 free(z); 535 free(w); 536 537 return(0); 538 } 539 540 /**************************************xyt.c***********************************/ 541 static PetscErrorCode do_xyt_solve(xyt_ADT xyt_handle, PetscScalar *uc) 542 { 543 PetscInt off, len, *iptr; 544 PetscInt level =xyt_handle->level; 545 PetscInt n =xyt_handle->info->n; 546 PetscInt m =xyt_handle->info->m; 547 PetscInt *stages =xyt_handle->info->stages; 548 PetscInt *xcol_indices=xyt_handle->info->xcol_indices; 549 PetscInt *ycol_indices=xyt_handle->info->ycol_indices; 550 PetscScalar *x_ptr, *y_ptr, *uu_ptr; 551 PetscScalar *solve_uu=xyt_handle->info->solve_uu; 552 PetscScalar *solve_w =xyt_handle->info->solve_w; 553 PetscScalar *x =xyt_handle->info->x; 554 PetscScalar *y =xyt_handle->info->y; 555 PetscBLASInt i1 = 1,dlen; 556 PetscErrorCode ierr; 557 558 PetscFunctionBegin; 559 uu_ptr=solve_uu; 560 PCTFS_rvec_zero(uu_ptr,m); 561 562 /* x = X.Y^T.b */ 563 /* uu = Y^T.b */ 564 for (y_ptr=y,iptr=ycol_indices; *iptr!=-1; y_ptr+=len) { 565 off =*iptr++; 566 len =*iptr++; 567 ierr = PetscBLASIntCast(len,&dlen);CHKERRQ(ierr); 568 PetscStackCallBLAS("BLASdot",*uu_ptr++ = BLASdot_(&dlen,uc+off,&i1,y_ptr,&i1)); 569 } 570 571 /* comunication of beta */ 572 uu_ptr=solve_uu; 573 if (level) {ierr = PCTFS_ssgl_radd(uu_ptr, solve_w, level, stages);CHKERRQ(ierr);} 574 PCTFS_rvec_zero(uc,n); 575 576 /* x = X.uu */ 577 for (x_ptr=x,iptr=xcol_indices; *iptr!=-1; x_ptr+=len) { 578 off =*iptr++; 579 len =*iptr++; 580 ierr = PetscBLASIntCast(len,&dlen);CHKERRQ(ierr); 581 PetscStackCallBLAS("BLASaxpy",BLASaxpy_(&dlen,uu_ptr++,x_ptr,&i1,uc+off,&i1)); 582 } 583 PetscFunctionReturn(0); 584 } 585 586 /**************************************xyt.c***********************************/ 587 static PetscErrorCode check_handle(xyt_ADT xyt_handle) 588 { 589 PetscInt vals[2], work[2], op[] = {NON_UNIFORM,GL_MIN,GL_MAX}; 590 591 PetscFunctionBegin; 592 if (!xyt_handle) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_PLIB,"check_handle() :: bad handle :: NULL %D\n",xyt_handle); 593 594 vals[0]=vals[1]=xyt_handle->id; 595 PCTFS_giop(vals,work,sizeof(op)/sizeof(op[0])-1,op); 596 if ((vals[0]!=vals[1])||(xyt_handle->id<=0)) SETERRQ3(PETSC_COMM_SELF,PETSC_ERR_PLIB,"check_handle() :: bad handle :: id mismatch min/max %D/%D %D\n", vals[0],vals[1], xyt_handle->id); 597 PetscFunctionReturn(0); 598 } 599 600 /**************************************xyt.c***********************************/ 601 static PetscErrorCode det_separators(xyt_ADT xyt_handle) 602 { 603 PetscInt i, ct, id; 604 PetscInt mask, edge, *iptr; 605 PetscInt *dir, *used; 606 PetscInt sum[4], w[4]; 607 PetscScalar rsum[4], rw[4]; 608 PetscInt op[] = {GL_ADD,0}; 609 PetscScalar *lhs, *rhs; 610 PetscInt *nsep, *lnsep, *fo, nfo=0; 611 PCTFS_gs_ADT PCTFS_gs_handle=xyt_handle->mvi->PCTFS_gs_handle; 612 PetscInt *local2global =xyt_handle->mvi->local2global; 613 PetscInt n =xyt_handle->mvi->n; 614 PetscInt m =xyt_handle->mvi->m; 615 PetscInt level =xyt_handle->level; 616 PetscInt shared =0; 617 PetscErrorCode ierr; 618 619 PetscFunctionBegin; 620 dir = (PetscInt*)malloc(sizeof(PetscInt)*(level+1)); 621 nsep = (PetscInt*)malloc(sizeof(PetscInt)*(level+1)); 622 lnsep= (PetscInt*)malloc(sizeof(PetscInt)*(level+1)); 623 fo = (PetscInt*)malloc(sizeof(PetscInt)*(n+1)); 624 used = (PetscInt*)malloc(sizeof(PetscInt)*n); 625 626 PCTFS_ivec_zero(dir,level+1); 627 PCTFS_ivec_zero(nsep,level+1); 628 PCTFS_ivec_zero(lnsep,level+1); 629 PCTFS_ivec_set (fo,-1,n+1); 630 PCTFS_ivec_zero(used,n); 631 632 lhs = (PetscScalar*)malloc(sizeof(PetscScalar)*m); 633 rhs = (PetscScalar*)malloc(sizeof(PetscScalar)*m); 634 635 /* determine the # of unique dof */ 636 PCTFS_rvec_zero(lhs,m); 637 PCTFS_rvec_set(lhs,1.0,n); 638 PCTFS_gs_gop_hc(PCTFS_gs_handle,lhs,"+\0",level); 639 ierr = PetscInfo(0,"done first PCTFS_gs_gop_hc\n");CHKERRQ(ierr); 640 PCTFS_rvec_zero(rsum,2); 641 for (i=0; i<n; i++) { 642 if (lhs[i]!=0.0) { rsum[0]+=1.0/lhs[i]; rsum[1]+=lhs[i]; } 643 if (lhs[i]!=1.0) shared=1; 644 } 645 646 PCTFS_grop_hc(rsum,rw,2,op,level); 647 rsum[0]+=0.1; 648 rsum[1]+=0.1; 649 650 xyt_handle->info->n_global=xyt_handle->info->m_global=(PetscInt) rsum[0]; 651 xyt_handle->mvi->n_global =xyt_handle->mvi->m_global =(PetscInt) rsum[0]; 652 653 /* determine separator sets top down */ 654 if (shared) { 655 /* solution is to do as in the symmetric shared case but then */ 656 /* pick the sub-hc with the most free dofs and do a mat-vec */ 657 /* and pick up the responses on the other sub-hc from the */ 658 /* initial separator set obtained from the symm. shared case */ 659 SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"shared dof separator determination not ready ... see hmt!!!\n"); 660 /* [dead code deleted since it is unlikely to be completed] */ 661 } else { 662 for (iptr=fo+n,id=PCTFS_my_id,mask=PCTFS_num_nodes>>1,edge=level;edge>0;edge--,mask>>=1) { 663 /* set rsh of hc, fire, and collect lhs responses */ 664 (id<mask) ? PCTFS_rvec_zero(lhs,m) : PCTFS_rvec_set(lhs,1.0,m); 665 PCTFS_gs_gop_hc(PCTFS_gs_handle,lhs,"+\0",edge); 666 667 /* set lsh of hc, fire, and collect rhs responses */ 668 (id<mask) ? PCTFS_rvec_set(rhs,1.0,m) : PCTFS_rvec_zero(rhs,m); 669 PCTFS_gs_gop_hc(PCTFS_gs_handle,rhs,"+\0",edge); 670 671 /* count number of dofs I own that have signal and not in sep set */ 672 for (PCTFS_ivec_zero(sum,4),ct=i=0;i<n;i++) { 673 if (!used[i]) { 674 /* number of unmarked dofs on node */ 675 ct++; 676 /* number of dofs to be marked on lhs hc */ 677 if ((id< mask)&&(lhs[i]!=0.0)) sum[0]++; 678 /* number of dofs to be marked on rhs hc */ 679 if ((id>=mask)&&(rhs[i]!=0.0)) sum[1]++; 680 } 681 } 682 683 /* for the non-symmetric case we need separators of width 2 */ 684 /* so take both sides */ 685 (id<mask) ? (sum[2]=ct) : (sum[3]=ct); 686 PCTFS_giop_hc(sum,w,4,op,edge); 687 688 ct=0; 689 if (id<mask) { 690 /* mark dofs I own that have signal and not in sep set */ 691 for (i=0;i<n;i++) { 692 if ((!used[i])&&(lhs[i]!=0.0)) { 693 ct++; nfo++; 694 *--iptr = local2global[i]; 695 used[i] =edge; 696 } 697 } 698 /* LSH hc summation of ct should be sum[0] */ 699 } else { 700 /* mark dofs I own that have signal and not in sep set */ 701 for (i=0; i<n; i++) { 702 if ((!used[i])&&(rhs[i]!=0.0)) { 703 ct++; nfo++; 704 *--iptr = local2global[i]; 705 used[i] = edge; 706 } 707 } 708 /* RSH hc summation of ct should be sum[1] */ 709 } 710 711 if (ct>1) PCTFS_ivec_sort(iptr,ct); 712 lnsep[edge]=ct; 713 nsep[edge] =sum[0]+sum[1]; 714 dir [edge] =BOTH; 715 716 /* LATER or we can recur on these to order seps at this level */ 717 /* do we need full set of separators for this? */ 718 719 /* fold rhs hc into lower */ 720 if (id>=mask) id-=mask; 721 } 722 } 723 724 /* level 0 is on processor case - so mark the remainder */ 725 for (ct=i=0;i<n;i++) { 726 if (!used[i]) { 727 ct++; nfo++; 728 *--iptr = local2global[i]; 729 used[i] = edge; 730 } 731 } 732 if (ct>1) PCTFS_ivec_sort(iptr,ct); 733 lnsep[edge]=ct; 734 nsep [edge]=ct; 735 dir [edge]=BOTH; 736 737 xyt_handle->info->nsep = nsep; 738 xyt_handle->info->lnsep = lnsep; 739 xyt_handle->info->fo = fo; 740 xyt_handle->info->nfo = nfo; 741 742 free(dir); 743 free(lhs); 744 free(rhs); 745 free(used); 746 PetscFunctionReturn(0); 747 } 748 749 /**************************************xyt.c***********************************/ 750 static mv_info *set_mvi(PetscInt *local2global, PetscInt n, PetscInt m, PetscErrorCode (*matvec)(mv_info*,PetscScalar*,PetscScalar*), void *grid_data) 751 { 752 mv_info *mvi; 753 754 mvi = (mv_info*)malloc(sizeof(mv_info)); 755 mvi->n = n; 756 mvi->m = m; 757 mvi->n_global = -1; 758 mvi->m_global = -1; 759 mvi->local2global= (PetscInt*)malloc((m+1)*sizeof(PetscInt)); 760 761 PCTFS_ivec_copy(mvi->local2global,local2global,m); 762 mvi->local2global[m] = INT_MAX; 763 mvi->matvec = matvec; 764 mvi->grid_data = grid_data; 765 766 /* set xyt communication handle to perform restricted matvec */ 767 mvi->PCTFS_gs_handle = PCTFS_gs_init(local2global, m, PCTFS_num_nodes); 768 769 return(mvi); 770 } 771 772 /**************************************xyt.c***********************************/ 773 static PetscErrorCode do_matvec(mv_info *A, PetscScalar *v, PetscScalar *u) 774 { 775 PetscFunctionBegin; 776 A->matvec((mv_info*)A->grid_data,v,u); 777 PetscFunctionReturn(0); 778 } 779 780