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High Resolution EC Earth Porting, scaling on Curie

High Resolution EC Earth Porting, scaling on Curie. Chandan Basu NSC, LIU, Sweden 11/12/07. High-res EC-EARTH configuration. Software EC-EARTH – v3 Nemo – 3.2 IFS – 36r1 OASIS – v3 Ocean grid : ORCA025 Atmospheric grid : T799. High-res EC-EARTH configuration.

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High Resolution EC Earth Porting, scaling on Curie

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  1. PRACE 7.2 High Resolution EC Earth Porting, scaling on Curie Chandan Basu NSC, LIU, Sweden 11/12/07

  2. PRACE 7.2 High-res EC-EARTH configuration • Software • EC-EARTH – v3 • Nemo – 3.2 • IFS – 36r1 • OASIS – v3 • Ocean grid : ORCA025 • Atmospheric grid : T799

  3. PRACE 7.2 High-res EC-EARTH configuration Some “scientific” ”limitations of the hres version on Curie • The ifs ifs-36r4 version is more interesting • At the time of porting this configuration was not ready • For scaling analysis the slightly older version should be ok • Runoff is disabled

  4. PRACE 7.2 Scaling of EC-EARTH

  5. PRACE 7.2 Scaling of EC-EARTH

  6. Scaling of EC-EARTH Efficiency = 394 * (time for 394 proc. Job / time for n proc. Job) / n PRACE 7.2

  7. PRACE 7.2 Scaling of EC-EARTH Efficiency = 1034 * (time for 1034 proc. Job / time for n proc. Job) / n

  8. PRACE 7.2 Profiling of EC-EARTH with Tau • Tau is a advanced profiling and tracing tool • The run can be profiled in different ways • Source code instrumentation is most advanced • User functions are instrumented by inserting timer in source code files • MPI calls are preloaded with PMPI calls • Very light weight timer • Not statistical sampling • Timing is accurate • Very little or no impact on run time • Several tools for post-processing profile data • pprof – text based • paraprof – GUI based

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