Date: 2021-02-01T14:41:48+00:00

Actual source code: test1.c
slepc-3.14.2 2021-02-01
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      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-2020, 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 BV operations.\n\n";

     13: #include <slepcbv.h>

     15: int main(int argc,char **argv)
     16: {
     17:   PetscErrorCode    ierr;
     18:   Vec               t,v;
     19:   Mat               Q,M;
     20:   BV                X,Y;
     21:   PetscInt          i,j,n=10,k=5,l=3,nloc;
     22:   PetscMPIInt       rank;
     23:   PetscScalar       *q,*z;
     24:   const PetscScalar *pX;
     25:   PetscReal         nrm;
     26:   PetscViewer       view;
     27:   PetscBool         verbose;

     29:   SlepcInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
     30:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
     31:   PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL);
     32:   PetscOptionsGetInt(NULL,NULL,"-l",&l,NULL);
     33:   PetscOptionsHasName(NULL,NULL,"-verbose",&verbose);
     34:   PetscPrintf(PETSC_COMM_WORLD,"Test BV with %D columns of dimension %D.\n",k,n);

     36:   /* Create template vector */
     37:   VecCreate(PETSC_COMM_WORLD,&t);
     38:   VecSetSizes(t,PETSC_DECIDE,n);
     39:   VecSetFromOptions(t);
     40:   VecGetLocalSize(t,&nloc);

     42:   /* Create BV object X */
     43:   BVCreate(PETSC_COMM_WORLD,&X);
     44:   PetscObjectSetName((PetscObject)X,"X");
     45:   BVSetSizesFromVec(X,t,k);
     46:   BVSetFromOptions(X);

     48:   /* Set up viewer */
     49:   PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view);
     50:   PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_INFO_DETAIL);
     51:   BVView(X,view);
     52:   PetscViewerPopFormat(view);

     54:   /* Fill X entries */
     55:   for (j=0;j<k;j++) {
     56:     BVGetColumn(X,j,&v);
     57:     VecSet(v,0.0);
     58:     for (i=0;i<4;i++) {
     59:       if (i+j<n) {
     60:         VecSetValue(v,i+j,(PetscScalar)(3*i+j-2),INSERT_VALUES);
     61:       }
     62:     }
     63:     VecAssemblyBegin(v);
     64:     VecAssemblyEnd(v);
     65:     BVRestoreColumn(X,j,&v);
     66:   }
     67:   if (verbose) {
     68:     BVView(X,view);
     69:   }

     71:   /* Create BV object Y */
     72:   BVCreate(PETSC_COMM_WORLD,&Y);
     73:   PetscObjectSetName((PetscObject)Y,"Y");
     74:   BVSetSizesFromVec(Y,t,l);
     75:   BVSetFromOptions(Y);

     77:   /* Fill Y entries */
     78:   for (j=0;j<l;j++) {
     79:     BVGetColumn(Y,j,&v);
     80:     VecSet(v,(PetscScalar)(j+1)/4.0);
     81:     BVRestoreColumn(Y,j,&v);
     82:   }
     83:   if (verbose) {
     84:     BVView(Y,view);
     85:   }

     87:   /* Create Mat */
     88:   MatCreateSeqDense(PETSC_COMM_SELF,k,l,NULL,&Q);
     89:   PetscObjectSetName((PetscObject)Q,"Q");
     90:   MatDenseGetArray(Q,&q);
     91:   for (i=0;i<k;i++)
     92:     for (j=0;j<l;j++)
     93:       q[i+j*k] = (i<j)? 2.0: -0.5;
     94:   MatDenseRestoreArray(Q,&q);
     95:   if (verbose) {
     96:     MatView(Q,NULL);
     97:   }

     99:   /* Test BVMult */
    100:   BVMult(Y,2.0,1.0,X,Q);
    101:   if (verbose) {
    102:     PetscPrintf(PETSC_COMM_WORLD,"After BVMult - - - - - - - - -\n");
    103:     BVView(Y,view);
    104:   }

    106:   /* Test BVMultVec */
    107:   BVGetColumn(Y,0,&v);
    108:   PetscMalloc1(k,&z);
    109:   z[0] = 2.0;
    110:   for (i=1;i<k;i++) z[i] = -0.5*z[i-1];
    111:   BVMultVec(X,-1.0,1.0,v,z);
    112:   PetscFree(z);
    113:   BVRestoreColumn(Y,0,&v);
    114:   if (verbose) {
    115:     PetscPrintf(PETSC_COMM_WORLD,"After BVMultVec - - - - - - -\n");
    116:     BVView(Y,view);
    117:   }

    119:   /* Test BVDot */
    120:   MatCreateSeqDense(PETSC_COMM_SELF,l,k,NULL,&M);
    121:   PetscObjectSetName((PetscObject)M,"M");
    122:   BVDot(X,Y,M);
    123:   if (verbose) {
    124:     PetscPrintf(PETSC_COMM_WORLD,"After BVDot - - - - - - - - -\n");
    125:     MatView(M,NULL);
    126:   }

    128:   /* Test BVDotVec */
    129:   BVGetColumn(Y,0,&v);
    130:   PetscMalloc1(k,&z);
    131:   BVDotVec(X,v,z);
    132:   BVRestoreColumn(Y,0,&v);
    133:   if (verbose) {
    134:     PetscPrintf(PETSC_COMM_WORLD,"After BVDotVec - - - - - - -\n");
    135:     VecCreateSeqWithArray(PETSC_COMM_SELF,1,k,z,&v);
    136:     PetscObjectSetName((PetscObject)v,"z");
    137:     VecView(v,view);
    138:     VecDestroy(&v);
    139:   }
    140:   PetscFree(z);

    142:   /* Test BVMultInPlace and BVScale */
    143:   BVMultInPlace(X,Q,1,l);
    144:   BVScale(X,2.0);
    145:   if (verbose) {
    146:     PetscPrintf(PETSC_COMM_WORLD,"After BVMultInPlace - - - - -\n");
    147:     BVView(X,view);
    148:   }

    150:   /* Test BVNorm */
    151:   BVNormColumn(X,0,NORM_2,&nrm);
    152:   PetscPrintf(PETSC_COMM_WORLD,"2-Norm of X[0] = %g\n",(double)nrm);
    153:   BVNorm(X,NORM_FROBENIUS,&nrm);
    154:   PetscPrintf(PETSC_COMM_WORLD,"Frobenius Norm of X = %g\n",(double)nrm);

    156:   /* Test BVGetArrayRead */
    157:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
    158:   if (!rank) {
    159:     PetscPrintf(PETSC_COMM_WORLD,"First row of X =\n");
    160:     BVGetArrayRead(X,&pX);
    161:     for (i=0;i<k;i++) {
    162:       PetscPrintf(PETSC_COMM_WORLD,"%g ",(double)PetscRealPart(pX[i*nloc]));
    163:     }
    164:     PetscPrintf(PETSC_COMM_WORLD,"\n");
    165:     BVRestoreArrayRead(X,&pX);
    166:   }

    168:   BVDestroy(&X);
    169:   BVDestroy(&Y);
    170:   MatDestroy(&Q);
    171:   MatDestroy(&M);
    172:   VecDestroy(&t);
    173:   SlepcFinalize();
    174:   return ierr;
    175: }

    177: /*TEST

    179:    test:
    180:       suffix: 1
    181:       nsize: 1
    182:       args: -bv_type {{vecs contiguous svec mat}separate output} -verbose

    184:    test:
    185:       suffix: 1_cuda
    186:       nsize: 1
    187:       args: -bv_type svec -vec_type cuda -verbose
    188:       requires: cuda
    189:       filter: sed -e "s/type: seqcuda/type: seq/"

    191: TEST*/