GPU Radix Sort

In the ongoing search of finding efficient GPU sorting algorithms I came across the following paper: http://mgarland.org/files/papers/gpusort-ipdps09.pdf   by Nadathur Satish, Mark Harris, and Michael Garland.  It is a preprint for the 23rd IEEE Int’l Parallel & Distributed Processing Symposium, May 2009 (http://www.ipdps.org/).

I have not tested if it is faster than the GPU quicksort (http://www.cs.chalmers.se/~dcs/gpuqsortdcs.html). Normal quicksort does slow down on nearly sorted or already sorted data so a radix sort might exhibit more stable behaviour.