Actual source code: test7.c

slepc-3.16.1 2021-11-17
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  1: /*
  2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
  4:    Copyright (c) 2002-2021, Universitat Politecnica de Valencia, Spain

  6:    This file is part of SLEPc.
  7:    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
  8:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  9: */

 11: static char help[] = "Test multiplication of a Mat times a BV.\n\n";

 13: #include <slepcbv.h>

 15: int main(int argc,char **argv)
 16: {
 18:   Vec            t,r,v;
 19:   Mat            B,Ymat;
 20:   BV             X,Y,Z,Zcopy;
 21:   PetscInt       i,j,m=10,n,k=5,rep=1,Istart,Iend;
 22:   PetscScalar    *pZ;
 23:   PetscReal      norm;
 24:   PetscViewer    view;
 25:   PetscBool      flg,verbose,fromfile;
 26:   char           filename[PETSC_MAX_PATH_LEN];
 27:   PetscViewer    viewer;
 28:   BVMatMultType  vmm;

 30:   SlepcInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
 31:   PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL);
 32:   PetscOptionsGetInt(NULL,NULL,"-rep",&rep,NULL);
 33:   PetscOptionsHasName(NULL,NULL,"-verbose",&verbose);
 34:   PetscOptionsGetString(NULL,NULL,"-file",filename,sizeof(filename),&fromfile);
 35:   MatCreate(PETSC_COMM_WORLD,&B);
 36:   PetscObjectSetName((PetscObject)B,"B");
 37:   if (fromfile) {
 38: #if defined(PETSC_USE_COMPLEX)
 39:     PetscPrintf(PETSC_COMM_WORLD," Reading COMPLEX matrix from a binary file...\n");
 40: #else
 41:     PetscPrintf(PETSC_COMM_WORLD," Reading REAL matrix from a binary file...\n");
 42: #endif
 43:     PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer);
 44:     MatSetFromOptions(B);
 45:     MatLoad(B,viewer);
 46:     PetscViewerDestroy(&viewer);
 47:     MatGetSize(B,&m,&n);
 48:     MatGetOwnershipRange(B,&Istart,&Iend);
 49:   } else {
 50:     /* Create 1-D Laplacian matrix */
 51:     PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);
 52:     PetscOptionsGetInt(NULL,NULL,"-n",&n,&flg);
 53:     if (!flg) n = m;
 54:     MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,m,n);
 55:     MatSetFromOptions(B);
 56:     MatSetUp(B);
 57:     MatGetOwnershipRange(B,&Istart,&Iend);
 58:     for (i=Istart;i<Iend;i++) {
 59:       if (i>0 && i-1<n) { MatSetValue(B,i,i-1,-1.0,INSERT_VALUES); }
 60:       if (i+1<n) { MatSetValue(B,i,i+1,-1.0,INSERT_VALUES); }
 61:       if (i<n) { MatSetValue(B,i,i,2.0,INSERT_VALUES); }
 62:     }
 63:     MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);
 64:     MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);
 65:   }

 67:   PetscPrintf(PETSC_COMM_WORLD,"Test BVMatMult (m=%D, n=%D, k=%D).\n",m,n,k);
 68:   MatCreateVecs(B,&t,&r);

 70:   /* Create BV object X */
 71:   BVCreate(PETSC_COMM_WORLD,&X);
 72:   PetscObjectSetName((PetscObject)X,"X");
 73:   BVSetSizesFromVec(X,t,k);
 74:   BVSetMatMultMethod(X,BV_MATMULT_VECS);
 75:   BVSetFromOptions(X);
 76:   BVGetMatMultMethod(X,&vmm);
 77:   PetscPrintf(PETSC_COMM_WORLD,"Using method: %s\n",BVMatMultTypes[vmm]);

 79:   /* Set up viewer */
 80:   PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view);
 81:   if (verbose) {
 82:     PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB);
 83:   }

 85:   /* Fill X entries */
 86:   for (j=0;j<k;j++) {
 87:     BVGetColumn(X,j,&v);
 88:     VecSet(v,0.0);
 89:     for (i=Istart;i<PetscMin(j+1,Iend);i++) {
 90:       VecSetValue(v,i,1.0,INSERT_VALUES);
 91:     }
 92:     VecAssemblyBegin(v);
 93:     VecAssemblyEnd(v);
 94:     BVRestoreColumn(X,j,&v);
 95:   }
 96:   if (verbose) {
 97:     MatView(B,view);
 98:     BVView(X,view);
 99:   }

101:   /* Create BV object Y */
102:   BVCreate(PETSC_COMM_WORLD,&Y);
103:   PetscObjectSetName((PetscObject)Y,"Y");
104:   BVSetSizesFromVec(Y,r,k+4);
105:   BVSetMatMultMethod(Y,BV_MATMULT_VECS);
106:   BVSetFromOptions(Y);
107:   BVSetActiveColumns(Y,2,k+2);

109:   /* Test BVMatMult */
110:   for (i=0;i<rep;i++) {
111:     BVMatMult(X,B,Y);
112:   }
113:   if (verbose) {
114:     BVView(Y,view);
115:   }

117:   /* Test BVGetMat/RestoreMat */
118:   BVGetMat(Y,&Ymat);
119:   PetscObjectSetName((PetscObject)Ymat,"Ymat");
120:   if (verbose) {
121:     MatView(Ymat,view);
122:   }
123:   BVRestoreMat(Y,&Ymat);

125:   if (!fromfile) {
126:     /* Create BV object Z */
127:     BVDuplicateResize(Y,k,&Z);
128:     PetscObjectSetName((PetscObject)Z,"Z");

130:     /* Fill Z entries */
131:     for (j=0;j<k;j++) {
132:       BVGetColumn(Z,j,&v);
133:       VecSet(v,0.0);
134:       if (!Istart) { VecSetValue(v,0,1.0,ADD_VALUES); }
135:       if (j<n && j>=Istart && j<Iend) { VecSetValue(v,j,1.0,ADD_VALUES); }
136:       if (j+1<n && j>=Istart && j<Iend) { VecSetValue(v,j+1,-1.0,ADD_VALUES); }
137:       VecAssemblyBegin(v);
138:       VecAssemblyEnd(v);
139:       BVRestoreColumn(Z,j,&v);
140:     }
141:     if (verbose) {
142:       BVView(Z,view);
143:     }

145:     /* Save a copy of Z */
146:     BVDuplicate(Z,&Zcopy);
147:     BVCopy(Z,Zcopy);

149:     /* Test BVMult, check result of previous operations */
150:     BVMult(Z,-1.0,1.0,Y,NULL);
151:     BVNorm(Z,NORM_FROBENIUS,&norm);
152:     PetscPrintf(PETSC_COMM_WORLD,"Norm of error: %g\n",(double)norm);
153:   }

155:   /* Test BVMatMultColumn, multiply Y(:,2), result in Y(:,3) */
156:   if (m==n) {
157:     BVMatMultColumn(Y,B,2);
158:     if (verbose) {
159:       BVView(Y,view);
160:     }

162:     if (!fromfile) {
163:       /* Test BVGetArray, modify Z to match Y */
164:       BVCopy(Zcopy,Z);
165:       BVGetArray(Z,&pZ);
166:       if (Istart==0) {
167:         if (Iend<3) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"First process must have at least 3 rows");
168:         pZ[Iend]   = 5.0;   /* modify 3 first entries of second column */
169:         pZ[Iend+1] = -4.0;
170:         pZ[Iend+2] = 1.0;
171:       }
172:       BVRestoreArray(Z,&pZ);
173:       if (verbose) {
174:         BVView(Z,view);
175:       }

177:       /* Check result again with BVMult */
178:       BVMult(Z,-1.0,1.0,Y,NULL);
179:       BVNorm(Z,NORM_FROBENIUS,&norm);
180:       PetscPrintf(PETSC_COMM_WORLD,"Norm of error: %g\n",(double)norm);
181:     }
182:   }

184:   BVDestroy(&Z);
185:   BVDestroy(&Zcopy);
186:   BVDestroy(&X);
187:   BVDestroy(&Y);
188:   MatDestroy(&B);
189:   VecDestroy(&t);
190:   VecDestroy(&r);
191:   SlepcFinalize();
192:   return ierr;
193: }

195: /*TEST

197:    testset:
198:       output_file: output/test7_1.out
199:       filter: grep -v "Using method"
200:       test:
201:          suffix: 1
202:          args: -bv_type {{vecs contiguous svec mat}shared output} -bv_matmult vecs
203:       test:
204:          suffix: 1_cuda
205:          args: -bv_type svec -mat_type aijcusparse -bv_matmult vecs
206:          requires: cuda
207:       test:
208:          suffix: 1_mat
209:          args: -bv_type {{vecs contiguous svec mat}shared output} -bv_matmult mat

211:    testset:
212:       output_file: output/test7_2.out
213:       filter: grep -v "Using method"
214:       args: -m 34 -n 38 -k 9
215:       nsize: 2
216:       test:
217:          suffix: 2
218:          args: -bv_type {{vecs contiguous svec mat}shared output} -bv_matmult vecs
219:       test:
220:          suffix: 2_cuda
221:          args: -bv_type svec -mat_type aijcusparse -bv_matmult vecs
222:          requires: cuda
223:       test:
224:          suffix: 2_mat
225:          args: -bv_type {{vecs contiguous svec mat}shared output} -bv_matmult mat

227: TEST*/