Adds a tiny alpine pod (check-cache) that runs first on the platform
pool (no autoscaler delay, ~3 sec end-to-end) and probes the
training-data PVC for /data/bin/$SHA/alpha_train. Outputs:
- sha: short SHA used for binary cache keying
- cache: "hit" or "miss"
ensure-binary now has `when: cache == miss` — when the binary is
already cached for the current SHA, the entire ~4.8GB ci-builder
image pull + sccache compile cycle is skipped. Re-runs on the same
SHA now go straight from submission to training in ~30 seconds
instead of ~3 minutes.
train depends on check-cache + ensure-binary; sources the SHA from
check-cache's output (works whether ensure-binary ran or was
skipped — Argo treats `when:` skip as a satisfied dependency).
Submission script (scripts/argo-alpha-perception.sh) now pre-resolves
commit-sha=HEAD to an actual git SHA via `git rev-parse origin/<branch>`
before submission. This lets the alpine check-cache pod work without
installing git in the container.
Also removed the now-stale `ci-training-h100x2|ci-training-h100-sxm`
case branch from the SM-arch detection — those pools no longer exist
post-pool-cleanup commit a252119fd.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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