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Stage MC-0c: shared VM code made per-VM or atomic (FABRIC-3.10.8 §3.4)

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- Dictionary lookup index is per VM (vm->fc_index, struct SfFcIndex):
  was one global index rebuilt whenever a different VM was searched, and
  heat reorganization could reorder another VM's buckets. Allocated on
  first lookup, freed by vm_cleanup(); allocation failure counted/logged,
  lookup falls back to a newest-first dictionary walk.
- PRNG: still one stream, stepped by compare-and-swap; SEED one store.
- state_variable removed (write-only; STATE is vm->mode).
- Sweep additions (Captain Bob's ruling): heartbeat_export.c delta
  last-values moved into each VM's HeartbeatState (were statics shared by
  every VM -- wrong across VMs today); TOP-WORDS list heap-sized per call
  (was static [1000]); inference_outputs_to_string() takes a caller
  buffer; three failure counters atomic; crc64 table published with
  release/acquire.
- Confirmed, unchanged: g_runtime compiled out of the kernel,
  g_hotwords_cache unreferenced, ttf cache core-0-only.
- Probe (removed): every VM has its own index; two VMs searched
  alternately 2x5000 lookups: 0 rebuilds, 0 wrong-VM results, all three
  ISAs.
- Standard sequence on amd64/aarch64/riscv64: dict_hash set unchanged,
  G byte-identical, MINT/WIREBIND/USE ok, conservation true, 0 idle growth.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Robert Allan James
2026-09-25 21:05:20 -04:00
co-authored by Claude Opus 5.5
parent 33f4090d6d
commit 355909d46f
28 changed files with 55241 additions and 125 deletions
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