Actual source code: test7.c

slepc-3.17.0 2022-03-31
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  1: /*
  2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
  4:    Copyright (c) 2002-, 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: {
 17:   Vec            t,r,v;
 18:   Mat            B,Ymat;
 19:   BV             X,Y,Z=NULL,Zcopy=NULL;
 20:   PetscInt       i,j,m=10,n,k=5,rep=1,Istart,Iend;
 21:   PetscScalar    *pZ;
 22:   PetscReal      norm;
 23:   PetscViewer    view;
 24:   PetscBool      flg,verbose,fromfile;
 25:   char           filename[PETSC_MAX_PATH_LEN];
 26:   PetscViewer    viewer;
 27:   BVMatMultType  vmm;

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

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

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

 78:   /* Set up viewer */
 79:   PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view);
 80:   if (verbose) PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB);

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

 96:   /* Create BV object Y */
 97:   BVCreate(PETSC_COMM_WORLD,&Y);
 98:   PetscObjectSetName((PetscObject)Y,"Y");
 99:   BVSetSizesFromVec(Y,r,k+4);
100:   BVSetMatMultMethod(Y,BV_MATMULT_VECS);
101:   BVSetFromOptions(Y);
102:   BVSetActiveColumns(Y,2,k+2);

104:   /* Test BVMatMult */
105:   for (i=0;i<rep;i++) BVMatMult(X,B,Y);
106:   if (verbose) BVView(Y,view);

108:   if (fromfile) {
109:     /* Test BVMatMultTranspose */
110:     BVDuplicate(X,&Z);
111:     BVSetRandom(Z);
112:     for (i=0;i<rep;i++) BVMatMultTranspose(Z,B,Y);
113:     if (verbose) {
114:       BVView(Z,view);
115:       BVView(Y,view);
116:     }
117:     BVDestroy(&Z);
118:     BVMatMultTransposeColumn(Y,B,2);
119:     if (verbose) BVView(Y,view);
120:   }

122:   /* Test BVGetMat/RestoreMat */
123:   BVGetMat(Y,&Ymat);
124:   PetscObjectSetName((PetscObject)Ymat,"Ymat");
125:   if (verbose) MatView(Ymat,view);
126:   BVRestoreMat(Y,&Ymat);

128:   if (!fromfile) {
129:     /* Create BV object Z */
130:     BVDuplicateResize(Y,k,&Z);
131:     PetscObjectSetName((PetscObject)Z,"Z");

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

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

150:     /* Test BVMult, check result of previous operations */
151:     BVMult(Z,-1.0,1.0,Y,NULL);
152:     BVNorm(Z,NORM_FROBENIUS,&norm);
153:     PetscPrintf(PETSC_COMM_WORLD,"Norm of error: %g\n",(double)norm);
154:   }

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

161:     if (!fromfile) {
162:       /* Test BVGetArray, modify Z to match Y */
163:       BVCopy(Zcopy,Z);
164:       BVGetArray(Z,&pZ);
165:       if (Istart==0) {
167:         pZ[Iend]   = 5.0;   /* modify 3 first entries of second column */
168:         pZ[Iend+1] = -4.0;
169:         pZ[Iend+2] = 1.0;
170:       }
171:       BVRestoreArray(Z,&pZ);
172:       if (verbose) BVView(Z,view);

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

181:   BVDestroy(&Z);
182:   BVDestroy(&Zcopy);
183:   BVDestroy(&X);
184:   BVDestroy(&Y);
185:   MatDestroy(&B);
186:   VecDestroy(&t);
187:   VecDestroy(&r);
188:   SlepcFinalize();
189:   return 0;
190: }

192: /*TEST

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

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

224:    testset:
225:       output_file: output/test7_3.out
226:       filter: grep -v "Using method"
227:       args: -file ${SLEPC_DIR}/share/slepc/datafiles/matrices/bfw62a.petsc -bv_reproducible_random
228:       requires: double !complex !defined(PETSC_USE_64BIT_INDICES)
229:       nsize: 2
230:       test:
231:          suffix: 3
232:          args: -bv_type {{vecs contiguous svec mat}shared output} -bv_matmult {{vecs mat}}

234: TEST*/