Actual source code: ex75.c

  1: /*$Id: ex75.c,v 1.28 2001/09/11 16:32:50 bsmith Exp $*/

  3: /* Program usage:  mpirun -np <procs> ex75 [-help] [all PETSc options] */

  5: static char help[] = "Tests the vatious routines in MatMPISBAIJ format.n";

 7:  #include petscmat.h

  9: int main(int argc,char **args)
 10: {
 11:   int         bs=1, mbs=16, d_nz=3, o_nz=3, prob=2;
 12:   Vec         x,y,u,s1,s2;
 13:   Mat         A,sA;
 14:   PetscRandom rctx;
 15:   double      r1,r2,tol=1.e-10;
 16:   int         i,j,i2,j2,I,J,ierr;
 17:   PetscScalar one=1.0, neg_one=-1.0, value[3], four=4.0,alpha=0.1,*vr;
 18:   int         n,rank,size,col[3],n1,block,row;
 19:   int         ncols,*cols,rstart,rend;
 20:   IS          isrow;

 22:   PetscInitialize(&argc,&args,(char *)0,help);
 23:   PetscOptionsGetInt(PETSC_NULL,"-mbs",&mbs,PETSC_NULL);
 24:   PetscOptionsGetInt(PETSC_NULL,"-bs",&bs,PETSC_NULL);
 25: 
 26:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 27:   MPI_Comm_size(PETSC_COMM_WORLD,&size);
 28: 
 29:   n = mbs*bs;
 30: 
 31:   /* Assemble MPISBAIJ matrix sA */
 32:   MatCreateMPISBAIJ(PETSC_COMM_WORLD,bs,PETSC_DECIDE,PETSC_DECIDE,n,n,d_nz,PETSC_NULL,o_nz,PETSC_NULL,&sA);

 34:   if (bs == 1){
 35:     if (prob == 1){ /* tridiagonal matrix */
 36:       value[0] = -1.0; value[1] = 2.0; value[2] = -1.0;
 37:       for (i=1; i<n-1; i++) {
 38:         col[0] = i-1; col[1] = i; col[2] = i+1;
 39:         /* PetscTrValid(0,0,0,0); */
 40:         MatSetValues(sA,1,&i,3,col,value,INSERT_VALUES);
 41:       }
 42:       i = n - 1; col[0]=0; col[1] = n - 2; col[2] = n - 1;
 43:       value[0]= 0.1; value[1]=-1; value[2]=2;
 44:       MatSetValues(sA,1,&i,3,col,value,INSERT_VALUES);

 46:       i = 0; col[0] = 0; col[1] = 1; col[2]=n-1;
 47:       value[0] = 2.0; value[1] = -1.0; value[2]=0.1;
 48:       MatSetValues(sA,1,&i,3,col,value,INSERT_VALUES);
 49:     }
 50:     else if (prob ==2){ /* matrix for the five point stencil */
 51:       n1 =  (int) sqrt(n);
 52:       if (n1*n1 != n){
 53:         SETERRQ(PETSC_ERR_ARG_SIZ,"n must be a perfect square of n1");
 54:       }
 55: 
 56:       for (i=0; i<n1; i++) {
 57:         for (j=0; j<n1; j++) {
 58:           I = j + n1*i;
 59:           if (i>0)   {J = I - n1; MatSetValues(sA,1,&I,1,&J,&neg_one,INSERT_VALUES);}
 60:           if (i<n1-1) {J = I + n1; MatSetValues(sA,1,&I,1,&J,&neg_one,INSERT_VALUES);}
 61:           if (j>0)   {J = I - 1; MatSetValues(sA,1,&I,1,&J,&neg_one,INSERT_VALUES);}
 62:           if (j<n1-1) {J = I + 1; MatSetValues(sA,1,&I,1,&J,&neg_one,INSERT_VALUES);}
 63:           MatSetValues(sA,1,&I,1,&I,&four,INSERT_VALUES);
 64:         }
 65:       }
 66:     }
 67:   } /* end of if (bs == 1) */
 68:   else {  /* bs > 1 */
 69:   for (block=0; block<n/bs; block++){
 70:     /* diagonal blocks */
 71:     value[0] = -1.0; value[1] = 4.0; value[2] = -1.0;
 72:     for (i=1+block*bs; i<bs-1+block*bs; i++) {
 73:       col[0] = i-1; col[1] = i; col[2] = i+1;
 74:       MatSetValues(sA,1,&i,3,col,value,INSERT_VALUES);
 75:     }
 76:     i = bs - 1+block*bs; col[0] = bs - 2+block*bs; col[1] = bs - 1+block*bs;
 77:     value[0]=-1.0; value[1]=4.0;
 78:     MatSetValues(sA,1,&i,2,col,value,INSERT_VALUES);

 80:     i = 0+block*bs; col[0] = 0+block*bs; col[1] = 1+block*bs;
 81:     value[0]=4.0; value[1] = -1.0;
 82:     MatSetValues(sA,1,&i,2,col,value,INSERT_VALUES);
 83:   }
 84:   /* off-diagonal blocks */
 85:   value[0]=-1.0;
 86:   for (i=0; i<(n/bs-1)*bs; i++){
 87:     col[0]=i+bs;
 88:     MatSetValues(sA,1,&i,1,col,value,INSERT_VALUES);
 89:     col[0]=i; row=i+bs;
 90:     MatSetValues(sA,1,&row,1,col,value,INSERT_VALUES);
 91:   }
 92:   }
 93:   MatAssemblyBegin(sA,MAT_FINAL_ASSEMBLY);
 94:   MatAssemblyEnd(sA,MAT_FINAL_ASSEMBLY);

 96:   /* Test MatView() */
 97:   /*
 98:   MatView(sA, PETSC_VIEWER_STDOUT_WORLD); 
 99:   MatView(sA, PETSC_VIEWER_DRAW_WORLD);
100:   */
101:   /* Assemble MPIBAIJ matrix A */
102:   MatCreateMPIBAIJ(PETSC_COMM_WORLD,bs,PETSC_DECIDE,PETSC_DECIDE,n,n,d_nz,PETSC_NULL,o_nz,PETSC_NULL,&A);

104:   if (bs == 1){
105:     if (prob == 1){ /* tridiagonal matrix */
106:       value[0] = -1.0; value[1] = 2.0; value[2] = -1.0;
107:       for (i=1; i<n-1; i++) {
108:         col[0] = i-1; col[1] = i; col[2] = i+1;
109:         /* PetscTrValid(0,0,0,0); */
110:         MatSetValues(A,1,&i,3,col,value,INSERT_VALUES);
111:       }
112:       i = n - 1; col[0]=0; col[1] = n - 2; col[2] = n - 1;
113:       value[0]= 0.1; value[1]=-1; value[2]=2;
114:       MatSetValues(A,1,&i,3,col,value,INSERT_VALUES);

116:       i = 0; col[0] = 0; col[1] = 1; col[2]=n-1;
117:       value[0] = 2.0; value[1] = -1.0; value[2]=0.1;
118:       MatSetValues(A,1,&i,3,col,value,INSERT_VALUES);
119:     }
120:     else if (prob ==2){ /* matrix for the five point stencil */
121:       n1 = (int) sqrt(n);
122:       for (i=0; i<n1; i++) {
123:         for (j=0; j<n1; j++) {
124:           I = j + n1*i;
125:           if (i>0)   {J = I - n1; MatSetValues(A,1,&I,1,&J,&neg_one,INSERT_VALUES);}
126:           if (i<n1-1) {J = I + n1; MatSetValues(A,1,&I,1,&J,&neg_one,INSERT_VALUES);}
127:           if (j>0)   {J = I - 1; MatSetValues(A,1,&I,1,&J,&neg_one,INSERT_VALUES);}
128:           if (j<n1-1) {J = I + 1; MatSetValues(A,1,&I,1,&J,&neg_one,INSERT_VALUES);}
129:           MatSetValues(A,1,&I,1,&I,&four,INSERT_VALUES);
130:         }
131:       }
132:     }
133:   } /* end of if (bs == 1) */
134:   else {  /* bs > 1 */
135:   for (block=0; block<n/bs; block++){
136:     /* diagonal blocks */
137:     value[0] = -1.0; value[1] = 4.0; value[2] = -1.0;
138:     for (i=1+block*bs; i<bs-1+block*bs; i++) {
139:       col[0] = i-1; col[1] = i; col[2] = i+1;
140:       MatSetValues(A,1,&i,3,col,value,INSERT_VALUES);
141:     }
142:     i = bs - 1+block*bs; col[0] = bs - 2+block*bs; col[1] = bs - 1+block*bs;
143:     value[0]=-1.0; value[1]=4.0;
144:     MatSetValues(A,1,&i,2,col,value,INSERT_VALUES);

146:     i = 0+block*bs; col[0] = 0+block*bs; col[1] = 1+block*bs;
147:     value[0]=4.0; value[1] = -1.0;
148:     MatSetValues(A,1,&i,2,col,value,INSERT_VALUES);
149:   }
150:   /* off-diagonal blocks */
151:   value[0]=-1.0;
152:   for (i=0; i<(n/bs-1)*bs; i++){
153:     col[0]=i+bs;
154:     MatSetValues(A,1,&i,1,col,value,INSERT_VALUES);
155:     col[0]=i; row=i+bs;
156:     MatSetValues(A,1,&row,1,col,value,INSERT_VALUES);
157:   }
158:   }
159:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
160:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

162:   /* Test MatGetSize(), MatGetLocalSize() */
163:   MatGetSize(sA, &i,&j); MatGetSize(A, &i2,&j2);
164:   i -= i2; j -= j2;
165:   if (i || j) {
166:     PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d], Error: MatGetSize()n",rank);
167:     PetscSynchronizedFlush(PETSC_COMM_WORLD);
168:   }
169: 
170:   MatGetLocalSize(sA, &i,&j); MatGetLocalSize(A, &i2,&j2);
171:   i2 -= i; j2 -= j;
172:   if (i2 || j2) {
173:     PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d], Error: MatGetLocalSize()n",rank);
174:     PetscSynchronizedFlush(PETSC_COMM_WORLD);
175:   }

177:   /* vectors */
178:   /*--------------------*/
179:  /* i is obtained from MatGetLocalSize() */
180:   VecCreate(PETSC_COMM_WORLD,&x);
181:   VecSetSizes(x,i,PETSC_DECIDE);
182:   VecSetFromOptions(x);
183:   VecDuplicate(x,&y);
184:   VecDuplicate(x,&u);
185:   VecDuplicate(x,&s1);
186:   VecDuplicate(x,&s2);

188:   PetscRandomCreate(PETSC_COMM_WORLD,RANDOM_DEFAULT,&rctx);
189:   VecSetRandom(rctx,x);
190:   VecSet(&one,u);

192:   /* Test MatNorm() */
193:   MatNorm(A,NORM_FROBENIUS,&r1);
194:   MatNorm(sA,NORM_FROBENIUS,&r2);
195:   r1 -= r2;
196:   if (r1<-tol || r1>tol){
197:     PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d], Error: MatNorm(), A_fnorm - sA_fnorm = %16.14en",rank,r1);
198:     PetscSynchronizedFlush(PETSC_COMM_WORLD);
199:   }

201:   /* Test MatGetOwnershipRange() */
202:   MatGetOwnershipRange(sA,&rstart,&rend);
203:   MatGetOwnershipRange(A,&i2,&j2);
204:   i2 -= rstart; j2 -= rend;
205:   if (i2 || j2) {
206:     PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d], Error: MaGetOwnershipRange()n",rank);
207:     PetscSynchronizedFlush(PETSC_COMM_WORLD);
208:   }

210:   /* Test MatGetRow(): can only obtain rows associated with the given processor */
211:   for (i=rstart; i<rstart+1; i++) {
212:     MatGetRow(sA,i,&ncols,&cols,&vr);
213:     /*
214:     PetscSynchronizedFPrintf(PETSC_COMM_WORLD,stdout,"[%d] get row %d: ",rank,i);
215:     for (j=0; j<ncols; j++) {
216:       PetscSynchronizedFPrintf(PETSC_COMM_WORLD,stdout,"%d %g  ",cols[j],vr[j]);
217:     }
218:     PetscSynchronizedFPrintf(PETSC_COMM_WORLD,stdout,"n");
219:     PetscSynchronizedFlush(PETSC_COMM_WORLD);
220:     */
221:     MatRestoreRow(sA,i,&ncols,&cols,&vr);
222:   }

224:   /* Test MatDiagonalScale(), MatGetDiagonal(), MatScale() */
225:   MatDiagonalScale(A,x,x);
226:   MatDiagonalScale(sA,x,x);
227:   MatGetDiagonal(A,s1);
228:   MatGetDiagonal(sA,s2);
229:   VecNorm(s1,NORM_1,&r1);
230:   VecNorm(s2,NORM_1,&r2);
231:   r1 -= r2;
232:   if (r1<-tol || r1>tol) {
233:     PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d], Error: MatDiagonalScale() or MatGetDiagonal(), r1=%g n",rank,r1);
234:     PetscSynchronizedFlush(PETSC_COMM_WORLD);
235:   }
236: 
237:   MatScale(&alpha,A);
238:   MatScale(&alpha,sA);

240:   /* Test MatGetRowMax() */
241:   MatGetRowMax(A,s1);
242:   MatGetRowMax(sA,s2);

244:   VecNorm(s1,NORM_1,&r1);
245:   VecNorm(s2,NORM_1,&r2);
246:   /* MatView(A,PETSC_VIEWER_STDOUT_WORLD);
247:   PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d], r1: %g, r2: %gn",rank,r1,r2);
248:       PetscSynchronizedFlush(PETSC_COMM_WORLD);
249:       */
250:   r1 -= r2;
251:   if (r1<-tol || r1>tol) {
252:     PetscPrintf(PETSC_COMM_SELF,"Error: MatGetRowMax() n");
253:   }

255:   /* Test MatMult(), MatMultAdd() */
256:   for (i=0; i<10; i++) {
257:     VecSetRandom(rctx,x);
258:     MatMult(A,x,s1);
259:     MatMult(sA,x,s2);
260:     VecNorm(s1,NORM_1,&r1);
261:     VecNorm(s2,NORM_1,&r2);
262:     r1 -= r2;
263:     if (r1<-tol || r1>tol) {
264:       PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d], Error: MatMult() or MatScale(), err=%gn",rank,r1);
265:       PetscSynchronizedFlush(PETSC_COMM_WORLD);
266:     }
267:   }

269:   for (i=0; i<10; i++) {
270:     VecSetRandom(rctx,x);
271:     VecSetRandom(rctx,y);
272:     MatMultAdd(A,x,y,s1);
273:     MatMultAdd(sA,x,y,s2);
274:     VecNorm(s1,NORM_1,&r1);
275:     VecNorm(s2,NORM_1,&r2);
276:     r1 -= r2;
277:     if (r1<-tol || r1>tol) {
278:       PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d], Error: MatMultAdd(), err=%g n",rank,r1);
279:       PetscSynchronizedFlush(PETSC_COMM_WORLD);
280:     }
281:   }

283:   /* Test MatZeroRows() */
284:   ISCreateStride(PETSC_COMM_SELF,2,rstart,2,&isrow);
285:   /* ISView(isrow, PETSC_VIEWER_STDOUT_SELF); */
286:   MatZeroRows(sA,isrow,PETSC_NULL);
287:   ISDestroy(isrow);
288:   /* MatView(sA, PETSC_VIEWER_STDOUT_WORLD);  */
289:   /* MatView(sA, PETSC_VIEWER_DRAW_WORLD);  */
290: 
291:   VecDestroy(u);
292:   VecDestroy(x);
293:   VecDestroy(y);
294:   VecDestroy(s1);
295:   VecDestroy(s2);
296:   MatDestroy(sA);
297:   MatDestroy(A);
298:   PetscRandomDestroy(rctx);
299: 
300:   PetscFinalize();
301:   return 0;
302: }