1. A multiprocessor computer system comprising: a plurality of processors, a plurality of storage system adapters coupled to a storage system, a plurality of network adapters coupled to a network, and a memory storing a plurality of operating systems each of which is executed using a subset of the plurality of processors, wherein each of the plurality of processors, storage system adapters and network adapters are assigned to one of the plurality of operating systems, and the operating systems specify at least one of the plurality of processors assigned to the operating system that are in a low load condition and maintains the specified processors idle.