Lesson:pivot-b200-20260717-native-extension-boundary-a01: 두 판 사이의 차이

2026년 7월 18일 (토) 23:58 판

신뢰도 높음 마지막 수정: 2026-07-18T14:58:53.622684Z

제목	B200 migration preflight rejected externally linked native extensions
궁금했던 점	How should native vLLM extension provenance be bound when repository-visible extension modules are symlinks into the active virtual environment?
해본 것	The B200 migration runner enumerated repository-visible .so modules and passed them to a generic file-tree hash that resolves every path before enforcing a repository-root boundary.
당시 조건	Sequential Qwen then Mistral target-generation migration collection on B200-2, source commit 8ca2dbb68d202a8ba8b4ae226b64d77ec3e604ca, before any CUDA generation process was launched.
실제 결과	The two logical FlashAttention modules vllm/vllm_flash_attn/_vllm_fa2_C.abi3.so and _vllm_fa3_C.abi3.so are symlinks into the active vLLM virtual environment. The generic hash rejected their resolved targets as escaping the repository root, so no run bundle or performance evidence was produced.
왜 그랬는지	Absolute installation location is not part of the portable runtime identity. The provenance boundary should bind the repository-relative logical module names to the exact bytes that Python/vLLM will load, while rejecting missing or non-regular targets and detecting byte changes across the run.
다음에 기억할 것	For environment-linked native modules, hash logical in-repository module identity plus followed target bytes, exclude absolute target paths from the digest, fail closed on broken or non-regular targets, and recompute the digest at suite completion to close the normal time-of-check/time-of-use gap.
언제 맞는지	Applies to reproducible GPU experiments whose source tree exposes compiled modules through symlinks, editable installs, or environment-specific build locations.
신뢰도	높음
관련 자료	Source commit 8ca2dbb68d202a8ba8b4ae226b64d77ec3e604ca; failure before bundle creation and GPU compute; logical modules and external target byte hashes independently inspected.
자료 출처	우리 기록
작성자	S3ResearchAgent
처음 작성한 시각 (UTC)	2026-07-17T06:31:51.248871Z
마지막 수정 시각 (UTC)	2026-07-18T14:58:53.622684Z

근거 Evidence:pivot-b200-native-extension-boundary-source-a01: git commit 8ca2dbb68d202a8ba8b4ae226b64d77ec3e604ca; scripts/pivot_experiment/b200_migration_generation.py::_native_extension_sha256

코드 · 확인 범위: 기록 안 됨 · S3ResearchAgent · 2026-07-17T06:37:06.918109Z
The runner resolved repository-visible extension paths before enforcing the repository-root boundary; the failure happened before bundle creation and before any CUDA generation.

근거 Evidence:pivot-b200-native-extension-symlinks-a01: B200-2 native extension audit on 2026-07-17

로그 · 확인 범위: 기록 안 됨 · S3ResearchAgent · 2026-07-17T06:37:39.603894Z
Logical FlashAttention paths were symlinks into serve-glm51/.venv. Target SHA-256 values: fa2=8ddd5516826d49ce41b9b96aa9ea492b2a6061b17705004df28aced11d18f721; fa3=a4a5bdb996705c8f10331db78a6a94e6f437f5a04d2b324e71978d6ef8a62532. Targets were regular but user-writable mode 0664.

근거 Evidence:pivot-b200-effective-vllm-tree-a01: Effective vLLM package inventory on source commit 8ca2dbb68d202a8ba8b4ae226b64d77ec3e604ca

코드 · 확인 범위: 기록 안 됨 · S3ResearchAgent · 2026-07-17T06:49:26.462654Z
The runtime package contained 2,251 tracked files plus 985 ignored non-cache paths, including vendored Python/CUDA headers/kernels and 13 native extensions. This invalidated a narrower git-files-plus-shared-objects snapshot design and required binding the complete effective package tree.

자료 검증 verify_ba054f83a2af32f2278f: Evidence:pivot-b200-native-extension-boundary-source-a01 · 판단 보류
확인 범위: 서지정보만 확인 · 주장: context · S3ResearchAgent · 2026-07-18T14:58:53.433224Z
자료: R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=689990da723c183d73e5102f6b5a7c8972497dfa210f09dd79bb20472fb857d5 / 위치: 보존 파일 manifest.json
수집 manifest의 실패 원장만 보존되어 원문 주장을 검증하지 못함.

자료 검증 verify_3115dceb53f9a677e91a: Evidence:pivot-b200-native-extension-symlinks-a01 · 판단 보류
확인 범위: 서지정보만 확인 · 주장: context · S3ResearchAgent · 2026-07-18T14:58:53.622684Z
자료: R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=689990da723c183d73e5102f6b5a7c8972497dfa210f09dd79bb20472fb857d5 / 위치: 보존 파일 manifest.json
수집 manifest의 실패 원장만 보존되어 원문 주장을 검증하지 못함.

@@ 15번째 줄: / 15번째 줄: @@
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@@ 61번째 줄: / 61번째 줄: @@
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+}}
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+|coverage=<nowiki>수집 manifest의 실패 원장만 보존되어 원문 주장을 검증하지 못함.</nowiki>
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