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Experiences with MPI Program Migration

Experiences with MPI Program Migration. Karolina Sarnowska -Upton University of Virginia. Preparing Computing Environments to Execute Jobs. Learning to use new computing environments can be time consuming Especially for MPI applications Especially when using multiple sites

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Experiences with MPI Program Migration

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  1. Experiences with MPI Program Migration Karolina Sarnowska-Upton University of Virginia

  2. Preparing Computing Environments to Execute Jobs • Learning to use new computing environments can be time consuming • Especially for MPI applications • Especially when using multiple sites • Automate process to • Free users from manual preparation • Enable more efficient use of resources

  3. What to Automate? • Discovery of application information related to deployment: architecture, MPI type & version, shared object dependencies, C library version • Composing of site-specific instructions for application deployment: set MPI, resolve shared object dependencies, set execution paths

  4. Current Developments • Discovery techniques – for Linux distributions • Resolution techniques • Identify problem • Set MPI stack configuration • Resolve software-related migration issues • Predict resolution success

  5. Environment Test Set *decommissioned

  6. Application Test Set

  7. Characterizing Migration Issues(without recompilation) • Configuration • Software-related • Architecture-related

  8. Results: Testing Discovery Techniques Test Set: NAS Parallel benchmarks across 3 sites • Discovery techniques • Identify MPI stack (100%) • Resolution techniques • Setup MPI Stack in execution environment (100%)

  9. Results: Resolving Software-Related Issues Test Set: NAS Parallel benchmarks across 5 sites • Discovery techniques • Identify software-related execution issues (100%) • Resolution techniques • Resolve* software-related execution issues (68%) • Predict resolution outcome (100%) *without recompilation

  10. Future Application Test Set

  11. Future Work • Create additional techniques that: • Address architecture-related migration issues • Enable recompilation • Evaluate efficiency of techniques for various community codes • Characterize causes of issues and automation limitations

  12. Conclusion “Civilization advances by extending the number of important operations which we can perform without thinking of them. ” Alfred North Whitehead

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