1. A dynamic processor-set management method comprising: process mapping processes to logical processor sets so that: when a process meets a first utilization-related criterion, it is transferred from a shared processor set to which other processes are mapped to a dedicated processor set to which only that process is mapped; and when a process meets a second utilization-related criterion, that process is transferred from a dedicated processor set to which only that process is mapped to a shared processor set to which other processes are mapped; core mapping said processor sets to processor cores; and executing processes mapped to a processor set on the core or cores to which that processor set is mapped.