1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests external direct solvers. Simplified from ex125.c\n\ 3c4762a1bSJed Brown Example: mpiexec -n <np> ./ex130 -f <matrix binary file> -mat_solver_type 1 -mat_superlu_equil \n\n"; 4c4762a1bSJed Brown 5c4762a1bSJed Brown #include <petscmat.h> 6c4762a1bSJed Brown 7c4762a1bSJed Brown int main(int argc,char **args) 8c4762a1bSJed Brown { 9c4762a1bSJed Brown Mat A,F; 10c4762a1bSJed Brown Vec u,x,b; 11c4762a1bSJed Brown PetscErrorCode ierr; 12c4762a1bSJed Brown PetscMPIInt rank,size; 13c4762a1bSJed Brown PetscInt m,n,nfact,ipack=0; 14c4762a1bSJed Brown PetscReal norm,tol=1.e-12,Anorm; 15c4762a1bSJed Brown IS perm,iperm; 16c4762a1bSJed Brown MatFactorInfo info; 17c4762a1bSJed Brown PetscBool flg,testMatSolve=PETSC_TRUE; 18c4762a1bSJed Brown PetscViewer fd; /* viewer */ 19c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; /* input file name */ 20c4762a1bSJed Brown 21c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 22*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 23*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 24c4762a1bSJed Brown 25c4762a1bSJed Brown /* Determine file from which we read the matrix A */ 26*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg)); 272c71b3e2SJacob Faibussowitsch PetscCheckFalse(!flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f option"); 28c4762a1bSJed Brown 29c4762a1bSJed Brown /* Load matrix A */ 30*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd)); 31*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&A)); 32*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatLoad(A,fd)); 33*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecCreate(PETSC_COMM_WORLD,&b)); 34*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecLoad(b,fd)); 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&fd)); 36*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetLocalSize(A,&m,&n)); 372c71b3e2SJacob Faibussowitsch PetscCheckFalse(m != n,PETSC_COMM_SELF,PETSC_ERR_ARG_SIZ, "This example is not intended for rectangular matrices (%d, %d)", m, n); 38*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatNorm(A,NORM_INFINITY,&Anorm)); 39c4762a1bSJed Brown 40c4762a1bSJed Brown /* Create vectors */ 41*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDuplicate(b,&x)); 42*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDuplicate(x,&u)); /* save the true solution */ 43c4762a1bSJed Brown 44c4762a1bSJed Brown /* Test LU Factorization */ 45*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetOrdering(A,MATORDERINGNATURAL,&perm,&iperm)); 46c4762a1bSJed Brown 47*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-mat_solver_type",&ipack,NULL)); 48c4762a1bSJed Brown switch (ipack) { 49c4762a1bSJed Brown case 1: 50c4762a1bSJed Brown #if defined(PETSC_HAVE_SUPERLU) 51dd400576SPatrick Sanan if (rank == 0) printf(" SUPERLU LU:\n"); 52*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetFactor(A,MATSOLVERSUPERLU,MAT_FACTOR_LU,&F)); 53c4762a1bSJed Brown break; 54c4762a1bSJed Brown #endif 55c4762a1bSJed Brown case 2: 56c4762a1bSJed Brown #if defined(PETSC_HAVE_MUMPS) 57dd400576SPatrick Sanan if (rank == 0) printf(" MUMPS LU:\n"); 58*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetFactor(A,MATSOLVERMUMPS,MAT_FACTOR_LU,&F)); 59c4762a1bSJed Brown { 60c4762a1bSJed Brown /* test mumps options */ 61c4762a1bSJed Brown PetscInt icntl_7 = 5; 62*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatMumpsSetIcntl(F,7,icntl_7)); 63c4762a1bSJed Brown } 64c4762a1bSJed Brown break; 65c4762a1bSJed Brown #endif 66c4762a1bSJed Brown default: 67dd400576SPatrick Sanan if (rank == 0) printf(" PETSC LU:\n"); 68*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetFactor(A,MATSOLVERPETSC,MAT_FACTOR_LU,&F)); 69c4762a1bSJed Brown } 70c4762a1bSJed Brown 71c4762a1bSJed Brown info.fill = 5.0; 72*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatLUFactorSymbolic(F,A,perm,iperm,&info)); 73c4762a1bSJed Brown 74c4762a1bSJed Brown for (nfact = 0; nfact < 1; nfact++) { 75dd400576SPatrick Sanan if (rank == 0) printf(" %d-the LU numfactorization \n",nfact); 76*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatLUFactorNumeric(F,A,&info)); 77c4762a1bSJed Brown 78c4762a1bSJed Brown /* Test MatSolve() */ 79c4762a1bSJed Brown if (testMatSolve) { 80*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSolve(F,b,x)); 81c4762a1bSJed Brown 82c4762a1bSJed Brown /* Check the residual */ 83*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatMult(A,x,u)); 84*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecAXPY(u,-1.0,b)); 85*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecNorm(u,NORM_INFINITY,&norm)); 86c4762a1bSJed Brown if (norm > tol) { 87dd400576SPatrick Sanan if (rank == 0) { 88*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscPrintf(PETSC_COMM_SELF,"MatSolve: rel residual %g/%g = %g, LU numfact %d\n",norm,Anorm,norm/Anorm,nfact)); 89c4762a1bSJed Brown } 90c4762a1bSJed Brown } 91c4762a1bSJed Brown } 92c4762a1bSJed Brown } 93c4762a1bSJed Brown 94c4762a1bSJed Brown /* Free data structures */ 95*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 96*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&F)); 97*5f80ce2aSJacob Faibussowitsch CHKERRQ(ISDestroy(&perm)); 98*5f80ce2aSJacob Faibussowitsch CHKERRQ(ISDestroy(&iperm)); 99*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&x)); 100*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&b)); 101*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&u)); 102c4762a1bSJed Brown ierr = PetscFinalize(); 103c4762a1bSJed Brown return ierr; 104c4762a1bSJed Brown } 105