Function column_array_clocks 

pub fn column_array_clocks(
    stripes: usize,
    blocks: usize,
    tokens: usize,
    passes: usize,
) -> usize

The clocks from the edge that takes start to the edge that raises the array’s last sums, for streams that offer every core its beat whenever it is ready: a stripe’s block step is one pair a core against every token-row, so the array runs as one column of one pair a group over the stripes.