Function place 

pub fn place(s: &Schedule) -> Arena

Place the arrays of s that live within its step: a computed tensor’s that is not one of the step’s inputs or outputs, all of it written before any launch reads it — whole, or part by part over every unit (join_in_place) — so nothing the step reads of it was left by another array, or by an earlier step. Each lives from its first touch to its last, through any view of it. The largest first, each at the lowest aligned offset clear of every array placed live beside it.