Patent ID: 7324934

Claim:
A computer-program-based method for providing a feedback control for a given set of entry and target control quantities χ and u of a system model where χ is an entry utilization value and u is a target utilization value, the method comprising a repetition of the following steps: a) providing a time-dependent simulation system model of a system in a computer memory for simulating performance of real hardware for a number n of iterations; b) providing a predetermined starting utilization value χ′ 1 for each of said entry utilization control quantities χ in said model, c) running the model based on said starting values and obtaining a resulting actual utilization value for each of said target utilization control quantities u, d) using the values obtained for u to define a new start value for χ for use in a repeated modeling step, e) storing in said computer memory for display, at least the value of χ for the last iteration, whereby the system method comprises the following formula to calculate the respective next value of the entry utilization control quantities: x n + 1 ′ = v n 1 + ρ n ⁡ ( 1 - v n ) where ρ n is an accumulated wait time divided by an accumulated processing time of the system and ν is a value according to the formula: ν n =( n +1) u−nu n χ′ n being valid for the next iteration only while u n and ρ n are values measured from the beginning of the simulation and, f) simulating a multi-processor system in which said utilization control quantities χ and u are central processor utilizations in a computer system model wherein utilization is the percentage of time the central processor utilizes for processing.