Landing: 929b1c42f3d2

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Project / Subsystem

gcc / libgomp

Date

2026-07-14

Author

Tobias Burnus

Commit

929b1c42f3d23dcffacdedb005ab83d3607b47ce

Source

github

Perf win

Breaking

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project: gcc
subsystem: libgomp
patch_id: —
commit_hash: 929b1c42f3d23dcffacdedb005ab83d3607b47ce
source_type: github
headline: Robustify device distance retrieval in libgomp
tldr: Fixes a data race and handles non-contiguous node numbering in libgomp's NUMA device distance retrieval.
author: Tobias Burnus
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libgomp
• NUMA
• concurrency
• performance
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/929b1c42f3d23dcffacdedb005ab83d3607b47ce
date: 2026-07-14T00:00:00.000Z

This commit addresses issues in libgomp’s retrieval of NUMA (Non-Uniform Memory Access) device distances. It introduces fixes to prevent a data race during initialization and ensures proper handling of systems where NUMA nodes are not numbered consecutively. This makes the gomp_get_numa_distance function more robust and reliable in diverse NUMA environments.