[CI] Parity: support sha=latest by resolving the latest green run on main - #3393
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[CI] Parity: support sha=latest by resolving the latest green run on main#3393ethanwee1 wants to merge 2 commits into
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…main download_testlogs required exactly one of --pr_id or --sha1 and rejected the "neither" case, so dispatching parity with an empty/"latest" sha (the documented "latest green on main" option, e.g. a baseline_sha comparison) failed with "Please provide either pr_id or sha!". Treat an empty --sha1 or the literal "latest" as "resolve latest green run on main": look up the newest successful ROCm default-workflow run on main (download_workflow_run already does this when given no head_sha) and use its head commit as the target sha. The parity.yml side already omits --sha1 for "latest", so no workflow change is needed. Also clarifies the both-provided error message.
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Jenkins build for 3ec517c634d490e4e861552aa79118d6f12b06ea commit finished as FAILURE |
Stack pytorch#3393 on pytorch#3406 so latest-SHA resolution uses the scheduled Preview topology instead of nightly.
ethanwee1
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August 11, 2026 15:01
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Superseded by clean current-develop replacement #3556. |
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Summary
Dispatching a parity run with the
shainput left empty / set tolatest— the documented "latest green on main" option (e.g. thebaseline_shacommit-vs-commit comparison in this failing run) — failed immediately with:download_testlogsrequired exactly one of--pr_idor--sha1and rejected the "neither" case, solatestwas never actually supported despite the input hint saying "Leave empty for latest green on main."Fix
Treat an empty
--sha1(or the literal stringlatest) as "resolve the latest green run on main":mainand use its head commit as the targetsha.download_workflow_run()already does exactly this when called with nohead_sha, so the change is small and self-contained.parity.ymlside already omits--sha1when the input islatest, so no workflow change is needed.pr_idand a realsha).Kept entirely in
download_testlogsso the script still works standalone (./download_testlogs --arch mi300now resolves latest instead of erroring).Validation (on fork)
baseline_sha+ empty sha, mi200): run 28811245419 — the guard no longer errors; the log now showsNo sha or pr_id given; resolving latest green ROCm run on main... Resolved 'latest' to sha: a09b29e7.... (That run then stops later only because the arbitrary baseline commit's mi200 artifacts have expired —HTTP 410 Gone— which is unrelated to this change.)latestrun (no baseline, mi300): run 28811384934 — end-to-end latest-green resolution + parity.Test plan
sha=latest/ empty no longer errors at the download step; resolves to a concrete head SHA.pr_idpath unchanged.latestrun produces a summary.Preview topology update
This branch is stacked on #3406 and now uses
previewonly, with the scheduledrocm-previewmi350prefix and 8/3/2 fallback matrix. Land #3406 first, then retarget this PR todevelop.