Stage K-2: COLD forgets to the fence; PAD moved below the block window (FABRIC-3.10.8 §4.2)

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- Defect 1: COLD now forgets every word since the fence exactly as FORGET
  does (new vm_dictionary_forget_to_fence(): untrack, metrics, entry) and
  rewinds HERE to the fence. It rewound HERE alone to 1024, leaving live
  words to be compiled over.
- Defect 2: PAD = BLK_VM_WINDOW_BASE - 512 (was inside the window's top
  slot, shared with BLOCK/BUFFER).
- Probe (plain FORTH, all three ISAs identical): PAD..PAD+511 =
  5238272..5238783 below the window (5238784); on a worker KA/KC found,
  COLD, then KA/KB/KC not found, HERE at the fence (1424), new word works.
- Standard sequence on amd64/aarch64/riscv64: hash and G unchanged,
  MINT/WIREBIND/USE ok, conserved, 0 idle growth.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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This commit is contained in:

Robert Allan James

2026-09-26 03:13:21 -04:00

co-authored by Claude Opus 5.5

parent 27c430e0ca

commit c9c97cf769

11 changed files with 27609 additions and 14 deletions

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experiments/bare_metal/runs/doe-aarch64-20260926-024629.csv

experiments/bare_metal/runs/doe-amd64-20260926-023300.csv

experiments/bare_metal/runs/doe-riscv64-20260926-030013.csv