Actual source code: ex41.c
2: static char help[] = "Reads a PETSc matrix and vector from a socket connection, solves a linear system and sends the result back.\n";
4: /*
5: Include "petscksp.h" so that we can use KSP solvers. Note that this file
6: automatically includes:
7: petscsys.h - base PETSc routines petscvec.h - vectors
8: petscmat.h - matrices
9: petscis.h - index sets petscksp.h - Krylov subspace methods
10: petscviewer.h - viewers petscpc.h - preconditioners
11: */
12: #include <petscksp.h>
14: int main(int argc, char **args)
15: {
16: KSP ksp; /* linear solver context */
17: Mat A; /* matrix */
18: Vec x, b; /* approx solution, RHS, exact solution */
19: PetscViewer fd; /* viewer */
21: PetscFunctionBeginUser;
22: PetscCall(PetscInitialize(&argc, &args, (char *)0, help));
23: fd = PETSC_VIEWER_SOCKET_WORLD;
25: PetscCall(VecCreate(PETSC_COMM_WORLD, &b));
26: PetscCall(VecLoad(b, fd));
27: PetscCall(MatCreate(PETSC_COMM_WORLD, &A));
28: PetscCall(MatLoad(A, fd));
29: PetscCall(VecDuplicate(b, &x));
31: PetscCall(KSPCreate(PETSC_COMM_WORLD, &ksp));
32: PetscCall(KSPSetOperators(ksp, A, A));
33: PetscCall(KSPSetFromOptions(ksp));
34: PetscCall(KSPSetUp(ksp));
35: PetscCall(KSPSolve(ksp, b, x));
36: PetscCall(VecView(x, fd));
37: PetscCall(MatDestroy(&A));
38: PetscCall(VecDestroy(&b));
39: PetscCall(VecDestroy(&x));
40: PetscCall(KSPDestroy(&ksp));
42: PetscCall(PetscFinalize());
43: return 0;
44: }
46: /*TEST
48: build:
49: requires: defined(PETSC_USE_SOCKET_VIEWER)
51: test:
52: TODO: Need to figure out how to test examples that use sockets
54: TEST*/