Performance prediction for a code with data-dependent runtimes

Research output: Contribution to journalArticlepeer-review


  • B. P. Foley
  • P. J. Isitt
  • D. P. Spooner
  • D. Rueckert
  • G. R. Nudd

Colleges, School and Institutes

External organisations

  • University of Warwick
  • Imperial College London


In this paper we present a predictive performance model for a key biomedical imaging application found as part of the U.K. e-Science Information eXtraction from Images (IXI) project. This code represents a significant challenge for our existing performance prediction tools as it has internal structures that exhibit highly variable runtimes depending on qualities in the input data provided. Since the runtime can vary by more than an order of magnitude, it has been difficult to apply meaningful quality of service criteria to workflows that use this code. The model developed here is used in the context of an interactive scheduling system which provides rapid feedback to the users, allowing them to tailor their workloads to available resources or to allocate extra resources to scheduled workloads.


Original languageEnglish
Pages (from-to)195-206
Number of pages12
JournalConcurrency Computation Practice and Experience
Issue number3
Publication statusPublished - 10 Mar 2008


  • Cluster computing, Grid computing, Medical image processing, Performance prediction