1 static char help[] = "Creates MatSeqBAIJ matrix of given BS for timing tests of MatMult().\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc,char **args) 6 { 7 Mat A; 8 Vec x,y; 9 PetscInt m=50000,bs=12,i,j,k,l,row,col,M, its = 25; 10 PetscScalar rval,*vals; 11 PetscRandom rdm; 12 13 PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 14 PetscCall(PetscOptionsGetInt(NULL,NULL,"-mat_block_size",&bs,NULL)); 15 PetscCall(PetscOptionsGetInt(NULL,NULL,"-its",&its,NULL)); 16 PetscCall(PetscOptionsGetInt(NULL,NULL,"-mat_size",&m,NULL)); 17 M = m*bs; 18 PetscCall(MatCreateSeqBAIJ(PETSC_COMM_SELF,bs,M,M,27,NULL,&A)); 19 PetscCall(MatSetOption(A,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_TRUE)); 20 21 PetscCall(PetscRandomCreate(PETSC_COMM_SELF,&rdm)); 22 PetscCall(PetscRandomSetFromOptions(rdm)); 23 PetscCall(VecCreateSeq(PETSC_COMM_SELF,M,&x)); 24 PetscCall(VecDuplicate(x,&y)); 25 26 /* For each block row insert at most 27 blocks */ 27 PetscCall(PetscMalloc1(bs*bs,&vals)); 28 for (i=0; i<m; i++) { 29 row = i; 30 for (j=0; j<27; j++) { 31 PetscCall(PetscRandomGetValue(rdm,&rval)); 32 col = (PetscInt)(PetscRealPart(rval)*m); 33 for (k=0; k<bs; k++) { 34 for (l=0; l<bs; l++) { 35 PetscCall(PetscRandomGetValue(rdm,&rval)); 36 vals[k*bs + l] = rval; 37 } 38 } 39 PetscCall(MatSetValuesBlocked(A,1,&row,1,&col,vals,INSERT_VALUES)); 40 } 41 } 42 PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 43 PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 44 PetscCall(PetscFree(vals)); 45 46 /* Time MatMult(), MatMultAdd() */ 47 for (i=0; i<its; i++) { 48 PetscCall(VecSetRandom(x,rdm)); 49 PetscCall(MatMult(A,x,y)); 50 PetscCall(VecSetRandom(x,rdm)); 51 PetscCall(VecSetRandom(y,rdm)); 52 PetscCall(MatMultAdd(A,x,y,y)); 53 } 54 55 PetscCall(MatDestroy(&A)); 56 PetscCall(VecDestroy(&x)); 57 PetscCall(VecDestroy(&y)); 58 PetscCall(PetscRandomDestroy(&rdm)); 59 PetscCall(PetscFinalize()); 60 return 0; 61 } 62 63 /*TEST 64 65 testset: 66 requires: defined(PETSC_USING_64BIT_PTR) 67 output_file: output/ex238_1.out 68 test: 69 suffix: 1 70 args: -mat_block_size 1 -mat_size 1000 -its 2 71 test: 72 suffix: 2 73 args: -mat_block_size 2 -mat_size 1000 -its 2 74 test: 75 suffix: 4 76 args: -mat_block_size 4 -mat_size 1000 -its 2 77 test: 78 suffix: 5 79 args: -mat_block_size 5 -mat_size 1000 -its 2 80 test: 81 suffix: 6 82 args: -mat_block_size 6 -mat_size 1000 -its 2 83 test: 84 suffix: 8 85 args: -mat_block_size 8 -mat_size 1000 -its 2 86 test: 87 suffix: 12 88 args: -mat_block_size 12 -mat_size 1000 -its 2 89 test: 90 suffix: 15 91 args: -mat_block_size 15 -mat_size 1000 -its 2 92 93 TEST*/ 94