Prediction Servomechanism and its Performance

Performance Limitations in the Robust Servomechanism Control Problem for Discrete and Sampled Data Systems

Accurate Performance Prediction for Assively Parallel Systems and Its Applications

A performance prediction method is presented, which accurately predicts the expected program execution time on massively parallel systems. We consider distributed-memory architectures with SMD nodes and a fast communication network. The method is based on a relaxed task graph model, a queuing model, and a memory hierarchy model. The relaxed task graph is a compact representation of communicatin...

Comparison of Adaptive Controllers for a Servomechanism

Electric motors with metal graphite brushes experience a change in contact resistance depending on current load. This varying resistance leads to varying gain in the motor, since the proportion of power dissipated due to the resistance changes. This investigation is concerned with a servomechanism, which uses such motors for position and force control. Force control with electric motors is typi...

Prediction and its limits.

Performance Stability and Prediction

This paper presents experimental data from our research on stability of parallel programs and cross-machine performance prediction on multicomputers. We characterize program behavior by an execution graph, obtained from running an instrumented version of the program. We assess program stability using time perturbations, and analyze the resulting execution graphs with an approximation of a graph...