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Performance modeling based on real data: a case study

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3 Author(s)
Hseuh, M.C. ; Coordinated Sci. Lab., Illinois Univ., Urbana, IL, USA ; Iyer, R.K. ; Trivedi, K.S.

A measurement-based performability model is described that is based on error and resource-usage data collected on a multiprocessor system. A method for identifying the model structure is introduced, and the resulting model is validated against real data. Model development from the collection of raw data to the estimation of the expected reward is described. Both normal behavior and error behavior of the system are characterized. The measured data show that the holding times in key operational and error states are not simple exponentials and that a semi-Markov process is necessary to model the system behavior. A reward function, which is based on the service rate and the error rate in each state, is defined in order to estimate the performability of the system and to depict the cost of different types of errors

Published in:

Computers, IEEE Transactions on  (Volume:37 ,  Issue: 4 )

Date of Publication:

Apr 1988

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