Flight Log / stanford-crfm/levanter #1018
Implement paged attention fallback on CPU — a OpenAI Codex (OpenAI) flight by David Hall
David Hall (@dlwh) opened this OpenAI Codex (OpenAI) pull request in stanford-crfm/levanter on Jun 27, 2025; merged clean in 2 min, merged by @dlwh: +336 −5, 2 files, 0 reviews.
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- +336 −5
- Files
- 2
- Commits
- 1
- Reviews
- 0
- To merge
- 2 min
- Task
- fix
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OpenAI Codex, in stanford-crfm/levanter, added a standard attention fallback for paged attention on CPU, removed TPU-only test skips, and fixed the CPU path for paged_decode position id broadcasting. The change spans two files with 336 additions and five deletions in one commit. It merged clean with no changes requested, 0.03 hours after opening.
From the pull request description
## Summary - fallback to standard attention when paged attention kernel is unavailable - remove TPU-only skips so paged attention tests run on other platforms - fix CPU fallback path for `paged_decode` and ensure position ids broadcast correctly ## Testing - `flake8 src/levanter/layers/attention.py…
Excerpt (first 300 characters) — the full description is on GitHub.
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Flight timeline
- —committedDavid Hall
- Jun 27, 2025labeleddlwh
- Jun 27, 2025mergeddlwh
- Jun 27, 2025closeddlwh
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Cite this flight: AgentRiders Flight Log, stanford-crfm/levanter#1018, record updated Nov 3, 2026, https://agentriders.com/logs/stanford-crfm/levanter/1018/
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