Mark Adams <mfad...@lbl.gov> writes: > My hash function is: > > PetscScalar v = ((PetscScalar)((PETSC_HASH_FACT*idx)%100) - > 49.5)/50.0; > ierr = VecSetValues(bb, 1, &idx, &v, > INSERT_VALUES);CHKERRQ(ierr); > > > include/petscctable.h:#define PETSC_HASH_FACT 79943
Still grid-aligned stripes on a 100xN grid. Please stop it with these bullshit ad-hoc hash functions. Either use a decent hash function or drand48.
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