Actual source code: ex58.c


  2: static char help[] = "Test VecCreate{Seq|MPI}CUDAWithArrays.\n\n";

  4: #include "petsc.h"

  6: int main(int argc,char **argv)
  7: {
  9:   Vec            x,y;
 10:   PetscMPIInt    size;
 11:   PetscInt       n = 5;
 12:   PetscScalar    xHost[5] = {0.,1.,2.,3.,4.};

 14:   PetscInitialize(&argc, &argv, (char*)0, help); if (ierr) return ierr;
 15:   MPI_Comm_size(PETSC_COMM_WORLD,&size);

 17:   if (size == 1) {
 18:     VecCreateSeqCUDAWithArrays(PETSC_COMM_WORLD,1,n,xHost,NULL,&x);
 19:   } else {
 20:     VecCreateMPICUDAWithArrays(PETSC_COMM_WORLD,1,n,PETSC_DECIDE,xHost,NULL,&x);
 21:   }
 22:   /* print x should be equivalent too xHost */
 23:   VecView(x,PETSC_VIEWER_STDOUT_WORLD);
 24:   VecSet(x,42.0);
 25:   /* print x should be all 42 */
 26:   VecView(x,PETSC_VIEWER_STDOUT_WORLD);

 28:   if (size == 1) {
 29:     VecCreateSeqWithArray(PETSC_COMM_WORLD,1,n,xHost,&y);
 30:   } else {
 31:     VecCreateMPIWithArray(PETSC_COMM_WORLD,1,n,PETSC_DECIDE,xHost,&y);
 32:   }

 34:   /* print y should be all 42 */
 35:   VecView(y, PETSC_VIEWER_STDOUT_WORLD);

 37:   VecDestroy(&y);
 38:   VecDestroy(&x);
 39:   PetscFinalize();
 40:   return ierr;
 41: }

 43: /*TEST

 45:    build:
 46:       requires: cuda

 48:    test:
 49:       nsize: 1
 50:       suffix: 1

 52:    test:
 53:       nsize: 2
 54:       suffix: 2

 56: TEST*/