Actual source code: ex28.c


  2: static char help[] = "Tests repeated VecDotBegin()/VecDotEnd().\n\n";

  4: #include <petscvec.h>

  6: int main(int argc,char **argv)
  7: {
  9:   PetscInt       n = 25,i,row0 = 0;
 10:   PetscScalar    two = 2.0,result1,result2,results[40],value,ten = 10.0;
 11:   PetscScalar    result1a,result2a;
 12:   PetscReal      result3,result4,result[2],result3a,result4a,resulta[2];
 13:   Vec            x,y,vecs[40];

 15:   PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;

 17:   /* create vectors */
 18:   VecCreate(PETSC_COMM_WORLD,&x);
 19:   VecSetSizes(x,n,PETSC_DECIDE);
 20:   VecSetFromOptions(x);
 21:   VecDuplicate(x,&y);
 22:   VecSetRandom(x,NULL);
 23:   VecViewFromOptions(x,NULL,"-x_view");
 24:   VecSet(y,two);

 26:   /*
 27:         Test mixing dot products and norms that require sums
 28:   */
 29:   result1 = result2 = 0.0;
 30:   result3 = result4 = 0.0;
 31:   VecDotBegin(x,y,&result1);
 32:   VecDotBegin(y,x,&result2);
 33:   VecNormBegin(y,NORM_2,&result3);
 34:   VecNormBegin(x,NORM_1,&result4);
 35:   PetscCommSplitReductionBegin(PetscObjectComm((PetscObject)x));
 36:   VecDotEnd(x,y,&result1);
 37:   VecDotEnd(y,x,&result2);
 38:   VecNormEnd(y,NORM_2,&result3);
 39:   VecNormEnd(x,NORM_1,&result4);

 41:   VecDot(x,y,&result1a);
 42:   VecDot(y,x,&result2a);
 43:   VecNorm(y,NORM_2,&result3a);
 44:   VecNorm(x,NORM_1,&result4a);

 46:   if (result1 != result1a || result2 != result2a) {
 47:     PetscPrintf(PETSC_COMM_WORLD,"Error dot: result1 %g result2 %g\n",(double)PetscRealPart(result1),(double)PetscRealPart(result2));
 48:   }
 49:   if (result3 != result3a || result4 != result4a) {
 50:     PetscPrintf(PETSC_COMM_WORLD,"Error 1,2 norms: result3 %g result4 %g\n",(double)result3,(double)result4);
 51:   }

 53:   /*
 54:         Test norms that only require abs
 55:   */
 56:   result1 = result2 = 0.0;
 57:   result3 = result4 = 0.0;
 58:   VecNormBegin(y,NORM_MAX,&result3);
 59:   VecNormBegin(x,NORM_MAX,&result4);
 60:   VecNormEnd(y,NORM_MAX,&result3);
 61:   VecNormEnd(x,NORM_MAX,&result4);

 63:   VecNorm(x,NORM_MAX,&result4a);
 64:   VecNorm(y,NORM_MAX,&result3a);
 65:   if (result3 != result3a || result4 != result4a) {
 66:     PetscPrintf(PETSC_COMM_WORLD,"Error max norm: result3 %g result4 %g\n",(double)result3,(double)result4);
 67:   }

 69:   /*
 70:         Tests dot,  max, 1, norm
 71:   */
 72:   result1 = result2 = 0.0;
 73:   result3 = result4 = 0.0;
 74:   VecSetValues(x,1,&row0,&ten,INSERT_VALUES);
 75:   VecAssemblyBegin(x);
 76:   VecAssemblyEnd(x);

 78:   VecDotBegin(x,y,&result1);
 79:   VecDotBegin(y,x,&result2);
 80:   VecNormBegin(x,NORM_MAX,&result3);
 81:   VecNormBegin(x,NORM_1,&result4);
 82:   VecDotEnd(x,y,&result1);
 83:   VecDotEnd(y,x,&result2);
 84:   VecNormEnd(x,NORM_MAX,&result3);
 85:   VecNormEnd(x,NORM_1,&result4);

 87:   VecDot(x,y,&result1a);
 88:   VecDot(y,x,&result2a);
 89:   VecNorm(x,NORM_MAX,&result3a);
 90:   VecNorm(x,NORM_1,&result4a);

 92:   if (result1 != result1a || result2 != result2a) {
 93:     PetscPrintf(PETSC_COMM_WORLD,"Error dot: result1 %g result2 %g\n",(double)PetscRealPart(result1),(double)PetscRealPart(result2));
 94:   }
 95:   if (result3 != result3a || result4 != result4a) {
 96:     PetscPrintf(PETSC_COMM_WORLD,"Error max 1 norms: result3 %g result4 %g\n",(double)result3,(double)result4);
 97:   }

 99:   /*
100:        tests 1_and_2 norm
101:   */
102:   VecNormBegin(x,NORM_MAX,&result3);
103:   VecNormBegin(x,NORM_1_AND_2,result);
104:   VecNormBegin(y,NORM_MAX,&result4);
105:   VecNormEnd(x,NORM_MAX,&result3);
106:   VecNormEnd(x,NORM_1_AND_2,result);
107:   VecNormEnd(y,NORM_MAX,&result4);

109:   VecNorm(x,NORM_MAX,&result3a);
110:   VecNorm(x,NORM_1_AND_2,resulta);
111:   VecNorm(y,NORM_MAX,&result4a);
112:   if (result3 != result3a || result4 != result4a) {
113:     PetscPrintf(PETSC_COMM_WORLD,"Error max: result1 %g result2 %g\n",(double)result3,(double)result4);
114:   }
115:   if (PetscAbsReal(result[0]-resulta[0]) > .01 || PetscAbsReal(result[1]-resulta[1]) > .01) {
116:     PetscPrintf(PETSC_COMM_WORLD,"Error 1 and 2 norms: result[0] %g result[1] %g\n",(double)result[0],(double)result[1]);
117:   }

119:   VecDestroy(&x);
120:   VecDestroy(&y);

122:   /*
123:        Tests computing a large number of operations that require
124:     allocating a larger data structure internally
125:   */
126:   for (i=0; i<40; i++) {
127:     VecCreate(PETSC_COMM_WORLD,vecs+i);
128:     VecSetSizes(vecs[i],PETSC_DECIDE,n);
129:     VecSetFromOptions(vecs[i]);
130:     value = (PetscReal)i;
131:     VecSet(vecs[i],value);
132:   }
133:   for (i=0; i<39; i++) {
134:     VecDotBegin(vecs[i],vecs[i+1],results+i);
135:   }
136:   for (i=0; i<39; i++) {
137:     VecDotEnd(vecs[i],vecs[i+1],results+i);
138:     if (results[i] != 25.0*i*(i+1)) {
139:       PetscPrintf(PETSC_COMM_WORLD,"i %D expected %g got %g\n",i,25.0*i*(i+1),(double)PetscRealPart(results[i]));
140:     }
141:   }
142:   for (i=0; i<40; i++) {
143:     VecDestroy(&vecs[i]);
144:   }

146:   PetscFinalize();
147:   return ierr;
148: }

150: /*TEST

152:    test:
153:       nsize: 3

155:    testset:
156:      nsize: 3
157:      output_file: output/ex28_1.out

159:      test:
160:         suffix: 2
161:         args: -splitreduction_async

163:      test:
164:         suffix: 2_cuda
165:         args: -splitreduction_async -vec_type cuda
166:         requires: cuda

168:      test:
169:         suffix: cuda
170:         args: -vec_type cuda
171:         requires: cuda

173:      test:
174:         suffix: 2_kokkos
175:         args: -splitreduction_async -vec_type kokkos
176:         requires: kokkos_kernels

178:      test:
179:         suffix: kokkos
180:         args: -vec_type kokkos
181:         requires: kokkos_kernels
182: TEST*/