For $r,d\in\mathbb{N}$, let
$$C_{r,d}=\{x\in\mathbb{Z}^d: \|x\|_1\le r\}\subset\mathbb{Z}^d$$
be the set of integer points of the $d$-dimensional cross-polytope with radius $r$.
What is (currently) the fastest way to sample from $C_{r,d}$ uniformly? Is there a method which is polynomial in $d$ and $\log(r)$?