Feedback process to model CP utilization multi-processor performance models

A computer program product for providing a feedback control for a given set of entry and target control quantities χ and μ of a system model, said computer program product comprising:

• a computer readable medium having recorded thereon computer readable program code performing the method comprising a repetition of the following steps:
• a) providing a starting value χ′1 for each of said entry control quantities χ in said model,
• b) running the model based on said starting values and obtaining a resulting actual value for each of said target control quantities μ,
• c) using the values obtained for μ to define a new start value for χ for use in a repeated modeling step,
• whereby the method comprises the following formula to calculate the respective next value of the entry control quantities:
• 11 x n + 1 ′ = v n 1 + ρ n ⁡ ( 1 - v n ) 6a)
• where ρn is a suitable parameter and
• vn=(n+1)u−nun (6b)
• χ′n is valid for the next iteration only while μn and ρn are values measured from the beginning of the simulation.

A computer system for providing a feedback control for a given set of entry and target control quantities χ and μ of a system model, the computer system comprising:

• a) a starting value χ′1 for each of said entry control quantities χ in said model,
• b) a control element running the model based on said starting values and obtaining a resulting actual value for each of said target control quantities μ,
• c) said control element using the values obtained for μ to define a new start value for χ for use in a repeated modeling step,
• whereby the control element uses the following formula to calculate the respective next value of the entry control quantities:
• 12 x n + 1 ′ = v n 1 + ρ n ⁡ ( 1 - v n ) 6a)
• where ρn is a suitable parameter and
• vn=(n+1)u−nun (6b)
• χ′n is valid for the next iteration only while μn and ρn are values measured from the beginning of the simulation.