Martin Vogel
cfab5d75f6
fix(graph): the id counter is never lowered after a parallel phase
...
After a parallel extract or resolve, the main buffer's counter was set to
the shared allocator's value. Merged worker nodes keep their shared ids,
and merged edges take fresh ids from the main counter after the highest
of them, so the main counter can end above the shared one. Setting it
down handed the merged edges' ids out a second time.
All four sync points (full route and closure repair, after extract and
after resolve) now go through cbm_pipeline_sync_next_id, which only
raises the counter. The delta preseed still pins it with
cbm_gbuf_set_next_id, as before.
On the 17 infra corpora the old sync left 94,239 duplicate edge ids in
the buffer (11 corpora; deckhouse 44,959), and the fix leaves none. The
persisted graph does not change, because the dump numbers edges itself.
The duplicates matter to anything that finds buffer edges by id:
cascade_delete_edges unindexes by id and then frees the edge, so a
duplicate can leave a freed edge in an index.
Tests: a parallel full index with the counters pinned by a test seam
fails with a duplicate edge id without the fix. Both full-route and both
closure-repair syncs are checked to run through the helper.
gbuf_raise_next_id_never_lowers covers the new buffer call.
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com >
2026-10-12 19:06:56 +02:00
..
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