1. A computer system comprising, a plurality of physical processors, a plurality of logical processors, a plurality of logical partitions each including one or more of the logical processors, and a control element for controlling the virtualization of the physical processors, the logical partitions and the logical processors, said control element operating to exclusively bind logical processors of logical partitions to physical processors, and wherein responsive to utilization, dispcyc, of a logical partition of the plurality of logical partitions being between a minimum, dispmin, for the logical partition utilization and a target, disptgt, for the logical partition utilization, the control element is to: undispatch a dispatched logical processor of the logical partition from a physical processor, responsive to the logical processor being in a WAIT state; and dispatch an undispatched logical processor of the logical partition to a physical processor, responsive to the logical processor not being in a WAIT state.