Date: 2026-03-31T05:46:38+00:00

Actual source code: ex3.c

      1: static const char help[] = "Test freeing of MPI types in PetscSF\n\n";

      3: #include <petscvec.h>
      4: #include <petscsf.h>
      5: #include <petscviewer.h>

      7: int main(int argc, char **argv)
      8: {
      9:   PetscSF      sf;
     10:   Vec          A, Aout;
     11:   PetscScalar *bufA;
     12:   PetscScalar *bufAout;
     13:   PetscMPIInt  rank, size;
     14:   PetscInt     nroots, nleaves;
     15:   PetscInt     i;
     16:   PetscInt    *ilocal;
     17:   PetscSFNode *iremote;
     18:   PetscBool    test_dupped_type;
     19:   MPI_Datatype contig;

     21:   PetscFunctionBeginUser;
     22:   PetscCall(PetscInitialize(&argc, &argv, NULL, help));
     23:   PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
     24:   PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));

     26:   PetscCheck(size == 1, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "Only coded for one MPI process");

     28:   PetscOptionsBegin(PETSC_COMM_WORLD, "", "PetscSF type freeing options", "none");
     29:   test_dupped_type = PETSC_FALSE;
     30:   PetscCall(PetscOptionsBool("-test_dupped_type", "Test dupped input type", "", test_dupped_type, &test_dupped_type, NULL));
     31:   PetscOptionsEnd();

     33:   PetscCall(PetscSFCreate(PETSC_COMM_WORLD, &sf));
     34:   PetscCall(PetscSFSetFromOptions(sf));

     36:   nleaves = 1;
     37:   nroots  = 1;
     38:   PetscCall(PetscMalloc1(nleaves, &ilocal));

     40:   for (i = 0; i < nleaves; i++) ilocal[i] = i;

     42:   PetscCall(PetscMalloc1(nleaves, &iremote));
     43:   iremote[0].rank  = 0;
     44:   iremote[0].index = 0;
     45:   PetscCall(PetscSFSetGraph(sf, nroots, nleaves, ilocal, PETSC_OWN_POINTER, iremote, PETSC_OWN_POINTER));
     46:   PetscCall(PetscSFSetUp(sf));
     47:   PetscCall(PetscSFView(sf, PETSC_VIEWER_STDOUT_WORLD));
     48:   PetscCall(VecCreate(PETSC_COMM_WORLD, &A));
     49:   PetscCall(VecSetSizes(A, 4, PETSC_DETERMINE));
     50:   PetscCall(VecSetFromOptions(A));
     51:   PetscCall(VecSetUp(A));

     53:   PetscCall(VecDuplicate(A, &Aout));
     54:   PetscCall(VecGetArray(A, &bufA));
     55:   for (i = 0; i < 4; i++) bufA[i] = (PetscScalar)i;
     56:   PetscCall(VecRestoreArray(A, &bufA));

     58:   PetscCall(VecGetArrayRead(A, (const PetscScalar **)&bufA));
     59:   PetscCall(VecGetArray(Aout, &bufAout));

     61:   PetscCallMPI(MPI_Type_contiguous(4, MPIU_SCALAR, &contig));
     62:   PetscCallMPI(MPI_Type_commit(&contig));

     64:   if (test_dupped_type) {
     65:     MPI_Datatype tmp;
     66:     PetscCallMPI(MPI_Type_dup(contig, &tmp));
     67:     PetscCallMPI(MPI_Type_free(&contig));
     68:     contig = tmp;
     69:   }
     70:   PetscCall(PetscSFRegisterPersistent(sf, contig, bufA, bufAout));
     71:   for (i = 0; i < 10000; i++) {
     72:     PetscCall(PetscSFBcastBegin(sf, contig, bufA, bufAout, MPI_REPLACE));
     73:     PetscCall(PetscSFBcastEnd(sf, contig, bufA, bufAout, MPI_REPLACE));
     74:   }
     75:   PetscCall(PetscSFDeregisterPersistent(sf, contig, bufA, bufAout));
     76:   PetscCall(VecRestoreArrayRead(A, (const PetscScalar **)&bufA));
     77:   PetscCall(VecRestoreArray(Aout, &bufAout));

     79:   PetscCall(VecView(Aout, PETSC_VIEWER_STDOUT_WORLD));
     80:   PetscCall(VecDestroy(&A));
     81:   PetscCall(VecDestroy(&Aout));
     82:   PetscCall(PetscSFDestroy(&sf));
     83:   PetscCallMPI(MPI_Type_free(&contig));
     84:   PetscCall(PetscFinalize());
     85:   return 0;
     86: }

     88: /*TEST

     90:    test:
     91:       suffix: basic
     92:       args: -sf_type basic

     94:    test:
     95:       suffix: basic_dupped
     96:       args: -test_dupped_type -sf_type basic

     98:    test:
     99:       suffix: window
    100:       filter: grep -v "type" | grep -v "sort"
    101:       args: -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create allocate dynamic}}
    102:       requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)

    104:    test:
    105:       suffix: window_dupped
    106:       filter: grep -v "type" | grep -v "sort"
    107:       args: -test_dupped_type -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor {{create allocate dynamic}}
    108:       requires: defined(PETSC_HAVE_MPI_ONE_SIDED) defined(PETSC_HAVE_MPI_FEATURE_DYNAMIC_WINDOW)

    110:    test:
    111:       suffix: window_shared
    112:       output_file: output/ex3_window.out
    113:       filter: grep -v "type" | grep -v "sort"
    114:       args: -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor shared
    115:       requires: defined(PETSC_HAVE_MPI_PROCESS_SHARED_MEMORY) defined(PETSC_HAVE_MPI_ONE_SIDED) !defined(PETSC_HAVE_I_MPI)

    117:    test:
    118:       suffix: window_dupped_shared
    119:       output_file: output/ex3_window_dupped.out
    120:       filter: grep -v "type" | grep -v "sort"
    121:       args: -test_dupped_type -sf_type window -sf_window_sync {{fence active lock}} -sf_window_flavor shared
    122:       requires: defined(PETSC_HAVE_MPI_PROCESS_SHARED_MEMORY) defined(PETSC_HAVE_MPI_ONE_SIDED) !defined(PETSC_HAVE_I_MPI)

    124: TEST*/