WarmUpModelValidation runs one throwaway validation of the uploaded model against its own
calculated intensities on a background thread (holding a GPUWorkBeside), so kernels, cuFFT
kernels and contexts on every card the null's replicates use are loaded before the collection's
validation. ValidateAgainstModel waits for a warm-up still running, so a real validation never
shares the cards with it and computes what it computes without one (test
ModelValidation_WarmUpChangesNothing; CLI run with and without warm-up: identical p.mtz,
p_maps.mtz, report and validation lines). The broker logs the warm-up's time at upload, which
measures the first-use cost on the machine directly (local RTX 5080: 0.88 s first, 0.78 s second).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PXc1zD1yxHqaR1DGdCTHL4
leonarski_fandClaude Opus 5.5
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