Need Jikes RVM having 'On the Fly' cycle collector implemented

[dsharma]

I came to know that 'On The Fly' cycle garbage collector was implemented in Jikes RVM. From where i can get that Jikes RVM version. Currently i have JIkes RVM 3.1.0 in which i did not get any on the fly cycle garbage collector.
Also if i get that Jikes RVM and if i import the necessary 'on the fly' packages into JIkes 3.1.0. Will there be any build issue for Jikes 3.1.0.