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Petaflops Application Meeting

Petaflops Application Meeting . Dec. 12 2004. Agenda. Updates Repositories Tools Projects Katherine on Steve Pieper’s Code Status of other codes. Updates. nek5 repository on cvs server Will add permissions for anybody interested Other codes should go there also if possible

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Petaflops Application Meeting

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  1. Petaflops Application Meeting Dec. 12 2004

  2. Agenda • Updates • Repositories • Tools • Projects • Katherine on Steve Pieper’s Code • Status of other codes

  3. Updates • nek5 repository on cvs server • Will add permissions for anybody interested • Other codes should go there also if possible • Tisha can do this quickly • Started to put together simple generic regression testing tools to go with above • mysql database setup on database server • Will be used collect performance information in standardized way • Need to nail down specs on what standard contains • Will email connection information • Who would like an account? • Next for nek5 • Most interesting stuff serial • Understand why in particular flop count low for various arhitectures

  4. Tools • Performs (Performance on Real Memory Systems) • Read/write latencies for memory subsystem • Not installed locally • Valgrind • Linux x86 debugger/profiler • On Jazz? • PAPI (Performance API) University of TN • Portable hardware counters • Requires kernel module, not installed on Jazz • On recorder.mcs.anl.gov • TAU (Tuning and Analysis Utilities) University of Oregon • Very portable, broad set of tools for full spectrum of profiling – shared and distributed memory, multi-language support, layered on Dyninst, Opari, Epilogue, Vampir, Paraver, etc. Multiple outputs, views. • On Jazz?

  5. Tools • Vampir (Intel) • Paradyn / Dyninst (University of Wisconsin) • Pablo Toolkit (University of Illinois) • Paraver/Dimemas (Barcelona) • Jumpshot (Argonne) • Complex views of MPI messaging patterns for large application • Installed on Jazz and many other places • FPMPI (Argonne) • Simple lightweight text-based MPI messaging diagnostics • Installed on Jazz and many other places

  6. Tools • HPM • IBMs • Speedshop • SGIs • Gprof • Linux-x86 call graphs/timings

  7. Related projects • PERC (Performance Evaluation Research Center) • Scidac ISIC for “Science of performance” • Paul and Boyana co-PI’s here • IPACS • Development of realistic scientific benchmarks

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