1. A method for managing a workload in a plurality of computing systems, each of said plurality of computing systems comprising one or more general resources and one or more specialized resources, the method comprising: determining, by a computer, parameters characteristic of a performance of said each of said plurality of computer systems, said parameters comprising a crossover factor for each of said one or more specialized resources and each of said one or more general resources; calculating, by said computer, an equivalent capacity (ECP), said ECP being a measure of a processing capacity of a computing system, said calculating comprising: based on said parameters and a test workload, exhausting said one or more specialized resources, and assigning a remaining workload of said test workload to said one or more general resources to determine utilization of said one or more general resources; and wherein said calculating of said ECP is based on said utilization of said one or more general resources, and is based on said crossover factor for said each of said one or more specialized resources and said each of said one or more general resources, wherein said crossover factor is based on a cost of said assigning of said remaining workload to said one or more general resources; and based on said ECP for said each of said plurality of computing systems, assigning, by a computer, said workload to an appropriate computing system selected from said plurality of computing systems.