International Business Machines Corporation

Jose Luis Ortiz

Michael C Hollinger

Jason Szecheong Ma

Thomas W Aarts

Gundam Raghuswamyreddy

Ched D Hays

Thomas A Kriz

Mechanisms are provided for controlling a fidelity of a simulation of a computer system. A model of the system is received that has a plurality of components. A representation of the plurality of individual components of the system is generated. A component is assigned to be a fidelity center having a highest possible associated fidelity value. Fidelity values are assigned to each other component in the plurality of individual components based on an affinity of the other component to the fidelity center. The system is simulated based on assigned fidelity values to the components in the plurality of individual components.

Determining simulation fidelity in a self-optimized simulation of a complex system

Mechanisms are provided for controlling a fidelity of a simulation of a system. A model of the system is received, the model of the system having a plurality of individual components of the system. Fidelity values are assigned to models of the individual components of the system. A simulation of the system is executed using the model of the system and the models of the individual components of the system. For each component in the plurality of individual components of the system, an activity level of the component during execution of the simulation is determined. The fidelity values of one or more of the models of the individual components of the system are dynamically adjusted during the execution of the simulation based on changes in individual activity levels of the individual components.

Dynamically adjusting simulation fidelity based on changes in activity levels of components

Mechanisms are provided for controlling a fidelity of a simulation of a system. A model of the system is received, the model of the system having a plurality of individual components of the system. Fidelity values are assigned to models of the individual components of the system. A simulation of the system is executed using the model of the system and the models of the individual components of the system. The fidelity values of one or more of the models of the individual components of the system are dynamically adjusted during the execution of the simulation by creating a checkpoint of a state of the simulation and modifying one or more fidelity values of one or more of the models of the individual components after generating the checkpoint, thereby generating a modified fidelity value state.

Dynamically adjusting simulation fidelity based on checkpointed fidelity state

Mechanisms are provided for controlling a fidelity of a simulation of a system. A model of the system is received, the model of the system having a plurality of individual components of the system. Fidelity values are assigned to models of the individual components of the system. A required fidelity value is assigned to transactions between components in the plurality of individual components of the system. A simulation of the system is executed using the model of the system and the models of the individual components of the system. The fidelity values of one or more of the models of the individual components of the system are dynamically adjusted during the execution of the simulation based on the required fidelity values assigned to the transactions.

Dynamically adjusting simulation fidelity in a self-optimized simulation of a complex system

Mechanisms are provided for controlling a fidelity of a simulation of a system. A model of the system is received, where the model has a plurality of individual components of the system. Fidelity values are assigned to models of the individual components of the system and a simulation of the system is executed using the model of the system and the models of the individual components of the system. The simulation comprises a plurality of transactions targeting a receiver component. A history of mismatches between a fidelity value associated with the receiver component and required fidelity values of the plurality of transactions targeting the receiver component is maintained. A prediction of a fidelity value to be assigned to the receiver component based on the history of mismatches is performed. A fidelity value of the receiver component is adjusted based on results of predicting the fidelity value to be assigned to the receiver component.

Dynamically predicting simulation fidelity in a self-optimized simulation of a complex system

A method, apparatus, and computer instructions for managing a set of virtual clocks in a data processing system with multiple partitions. A 'set-time-of-day' command is used in connection with each virtual clock to define a basis for its local date/time state via the following elements: (1) a partition peculiar time base reference value, and (2) a partition peculiar time offset reference value which corresponds to the state of an elapsed time counter at the point in time when the time base reference value is established. The partition time base reference and offset reference values are stored in memory. When executing a 'get-time-of-day' command, these are retrieved along with the current state of the elapsed time counter facility to compute the current date/time state of the virtual clock for the partition.

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Austin, TX, United States of America

Jose Luis Ortiz