Two nondeterministic event building methods derived from the Barrel Shifter

In high energy physics experiments, extensive parallelism allows scalable, high bandwidth data acquisition systems. Online event building of physical events is only feasible by using switch based event builders. The Barrel Shifter is a well known event building method for switch based event builders. Two nondeterministic versions of the Barrel Shifter introduced in the paper provide cost effective alternatives to the Barrel Shifter. Simulation results are presented to show the source buffer requirements of both nondeterministic methods and the Barrel Shifter at different types of detector dataflow.