1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests binary I/O of matrices and illustrates user-defined event logging.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown /* Note: Most applications would not read and write the same matrix within 7c4762a1bSJed Brown the same program. This example is intended only to demonstrate 8c4762a1bSJed Brown both input and output. */ 9c4762a1bSJed Brown 10c4762a1bSJed Brown int main(int argc,char **args) 11c4762a1bSJed Brown { 12c4762a1bSJed Brown Mat C; 13c4762a1bSJed Brown PetscScalar v; 14c4762a1bSJed Brown PetscInt i,j,Ii,J,Istart,Iend,N,m = 4,n = 4; 15c4762a1bSJed Brown PetscMPIInt rank,size; 16c4762a1bSJed Brown PetscViewer viewer; 17c4762a1bSJed Brown #if defined(PETSC_USE_LOG) 18c4762a1bSJed Brown PetscLogEvent MATRIX_GENERATE,MATRIX_READ; 19c4762a1bSJed Brown #endif 20c4762a1bSJed Brown 219566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 229566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 239566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 249566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL)); 259566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); 26c4762a1bSJed Brown N = m*n; 27c4762a1bSJed Brown 28c4762a1bSJed Brown /* PART 1: Generate matrix, then write it in binary format */ 29c4762a1bSJed Brown 309566063dSJacob Faibussowitsch PetscCall(PetscLogEventRegister("Generate Matrix",0,&MATRIX_GENERATE)); 319566063dSJacob Faibussowitsch PetscCall(PetscLogEventBegin(MATRIX_GENERATE,0,0,0,0)); 32c4762a1bSJed Brown 33c4762a1bSJed Brown /* Generate matrix */ 349566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&C)); 359566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,N,N)); 369566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 379566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 389566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C,&Istart,&Iend)); 39c4762a1bSJed Brown for (Ii=Istart; Ii<Iend; Ii++) { 40c4762a1bSJed Brown v = -1.0; i = Ii/n; j = Ii - i*n; 419566063dSJacob Faibussowitsch if (i>0) {J = Ii - n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,ADD_VALUES));} 429566063dSJacob Faibussowitsch if (i<m-1) {J = Ii + n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,ADD_VALUES));} 439566063dSJacob Faibussowitsch if (j>0) {J = Ii - 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,ADD_VALUES));} 449566063dSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,ADD_VALUES));} 459566063dSJacob Faibussowitsch v = 4.0; PetscCall(MatSetValues(C,1,&Ii,1,&Ii,&v,ADD_VALUES)); 46c4762a1bSJed Brown } 479566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 489566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 499566063dSJacob Faibussowitsch PetscCall(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 50c4762a1bSJed Brown 519566063dSJacob Faibussowitsch PetscCall(PetscPrintf(PETSC_COMM_WORLD,"writing matrix in binary to matrix.dat ...\n")); 529566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,"matrix.dat",FILE_MODE_WRITE,&viewer)); 539566063dSJacob Faibussowitsch PetscCall(MatView(C,viewer)); 549566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 559566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 569566063dSJacob Faibussowitsch PetscCall(PetscLogEventEnd(MATRIX_GENERATE,0,0,0,0)); 57c4762a1bSJed Brown 58c4762a1bSJed Brown /* PART 2: Read in matrix in binary format */ 59c4762a1bSJed Brown 60c4762a1bSJed Brown /* All processors wait until test matrix has been dumped */ 619566063dSJacob Faibussowitsch PetscCallMPI(MPI_Barrier(PETSC_COMM_WORLD)); 62c4762a1bSJed Brown 639566063dSJacob Faibussowitsch PetscCall(PetscLogEventRegister("Read Matrix",0,&MATRIX_READ)); 649566063dSJacob Faibussowitsch PetscCall(PetscLogEventBegin(MATRIX_READ,0,0,0,0)); 659566063dSJacob Faibussowitsch PetscCall(PetscPrintf(PETSC_COMM_WORLD,"reading matrix in binary from matrix.dat ...\n")); 669566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,"matrix.dat",FILE_MODE_READ,&viewer)); 679566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&C)); 689566063dSJacob Faibussowitsch PetscCall(MatLoad(C,viewer)); 699566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 709566063dSJacob Faibussowitsch PetscCall(PetscLogEventEnd(MATRIX_READ,0,0,0,0)); 719566063dSJacob Faibussowitsch PetscCall(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 72c4762a1bSJed Brown 73c4762a1bSJed Brown /* Free data structures */ 749566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 75c4762a1bSJed Brown 769566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 77b122ec5aSJacob Faibussowitsch return 0; 78c4762a1bSJed Brown } 79c4762a1bSJed Brown 80c4762a1bSJed Brown /*TEST 81c4762a1bSJed Brown 82c4762a1bSJed Brown test: 83*8cc725e6SPierre Jolivet filter: grep -v " MPI process" 84c4762a1bSJed Brown 85c4762a1bSJed Brown TEST*/ 86