OpenACC directives for SoilBiogeochemCompetition#4027

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ESCOMP:nvidia-hackathon-26from

samsrabin:soilbiogeochemcompetition-openacc

Commits on May 5, 2026

Cover all branches in SoilBiogeochemCompetition baseline by default

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Commits on May 6, 2026

100 iterations
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Make --fast canonical config MIMICS-off; split baseline files

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Add baseline_checksum_fast.txt for canonical --fast config

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Update SoilBiogeochemCompetition README for new canonical --fast

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Replace mimics_decomp - 1 with named constant non_mimics_decomp

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Polish comments in SoilBiogeochemCompetition

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Add verify.sh helper for SoilBiogeochemCompetition perf testing

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Add perf_timers_mod + INNER_TIMING build plumbing

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Wrap canonical-path loops in SoilBiogeochemCompetition with timers

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Wire perf_timer_print + dump_csv into driver

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Document INNER_TIMING in SoilBiogeochemCompetition README

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Extract accum_sminn_tot helper from Loop 15

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Extract compute_nuptake_prof helper from Loop 16

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Extract compete_nh4 helper from Loop 17 (Step 3c-i)

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Extract compete_no3 helper from Loop 17 (Step 3c-ii)

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Extract compute_n2o_emissions helper from Loop 17 (Step 3c-iii)

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Extract apply_carbon_only_adjustment helper from Loop 17 (Step 3c-iv)

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Extract compute_competition_summary helper from Loop 17 (Step 3c-v)

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Extract accum_sminn_to_plant helper from Loop 18 (Step 3d)

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Extract residual-uptake math helpers from Loop NH4 (Step 3e-i)

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Reuse residual-uptake math helpers in NO3 second pass (Step 3e-ii)

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Extract Loop 23 immobilization sum; generalize dz-weighted helper (Step 3f)

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Extract compute_fraction_or_one helper from Loop 24 (Step 3g)

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Document Step 3 helper structure in SoilBiogeochemCompetition README

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Add GPU run plumbing + CPU/GPU measurement docs (Step 4)

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Fix run_gpu.sh quoting; preserve --fast inner-timing CSV

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Add OpenACC directives + local data region to accum_sminn_tot (Step 5a)

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Hoist accum_sminn_tot inputs to driver-level !$acc data region (Step 5a)

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Relocate accum_sminn_tot data hoist into the routine (Step 5a)

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GPU-ify compute_nuptake_prof; widen inner data region (Step 5b)

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Switch CPU-parallel baseline from -acc=multicore to OpenMP (-mp)

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Commits on May 7, 2026