Could anyone explain the mechanism of wavefront

Discussion created by wgbljl on Jul 27, 2009
Latest reply on Jul 28, 2009 by ryta1203

The programming guide says that the first 64 threads conpose a wavefront which is executed on the first SIMD engine, so is the following wavefront. My problem is how does the wavefront switched between each other. In CUDA, the warps (equal to wavefront) are switched every instruction. So how this happens in AMD's GPU?