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starkernel: item 4.1 -- hot words onto the Stadium, density-ranked eviction

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Punch list §25 item 4.1 complete.
Replaces the round-robin hotwords cache with Stadium density-ranked
admission/eviction on the kernel side, via the §17.7 reservoir mechanism and a
kernel-side word_id -> cell_index map (no DictEntry change, dict_hash
untouched). Adds stadium_birth_hera() to close the cell-0 panic hazard,
STADIUM_WORD_HEAT_QUANTUM/STADIUM_WORD_COOL_RATE_Q48 Kconfig knobs (flagged
untuned), and a stadium_word_forget() FORGET coherence hook to close a
recycled-word_id aliasing gap.

Verified: all five hotwords_cache_* call sites in dictionary_management.c
bypassed under __STARKERNEL__; word dispatch feeds the Stadium at all three
vm_core.c physics_execution_heat_increment() sites; hosted make unaffected;
all three architectures booted to ok> with matching dict_hash
(0x3d4e1daf289da94f) and matching conservation stats (promotions=354
evictions=0, resident_sum=65536 reservoir=0 sum=65536).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Robert Allan James
2026-08-05 13:37:10 -04:00
co-authored by Claude Sonnet 5
parent bd92c57834
commit 3d0b9351bd
19 changed files with 32009 additions and 24 deletions
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include/starforth_config.h
+10
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@@ -74,6 +74,8 @@
#define STARFORTH_CONFIG_STADIUM_CONTAINS_DEPTH_MAX_DEFAULT 5
#define STARFORTH_CONFIG_STADIUM_CAPACITY_TICK_DEFAULT 1000
#define STARFORTH_CONFIG_STADIUM_MEMORY_PERCENT_DEFAULT 1
#define STARFORTH_CONFIG_STADIUM_WORD_HEAT_QUANTUM_DEFAULT 2048
#define STARFORTH_CONFIG_STADIUM_WORD_COOL_RATE_Q48_DEFAULT 21845
#define STARFORTH_CONFIG_HEARTBEAT_CHECK_FREQUENCY_DEFAULT 256
#define STARFORTH_CONFIG_HEARTBEAT_WINDOW_TUNING_FREQUENCY_DEFAULT 1000
#define STARFORTH_CONFIG_HEARTBEAT_SLOPE_VALIDATION_FREQUENCY_DEFAULT 5000
@@ -175,6 +177,14 @@
#define STADIUM_MEMORY_PERCENT STARFORTH_CONFIG_STADIUM_MEMORY_PERCENT_DEFAULT
#endif
#ifndef STADIUM_WORD_HEAT_QUANTUM
#define STADIUM_WORD_HEAT_QUANTUM STARFORTH_CONFIG_STADIUM_WORD_HEAT_QUANTUM_DEFAULT
#endif
#ifndef STADIUM_WORD_COOL_RATE_Q48
#define STADIUM_WORD_COOL_RATE_Q48 STARFORTH_CONFIG_STADIUM_WORD_COOL_RATE_Q48_DEFAULT
#endif
#ifndef HEARTBEAT_CHECK_FREQUENCY
#define HEARTBEAT_CHECK_FREQUENCY STARFORTH_CONFIG_HEARTBEAT_CHECK_FREQUENCY_DEFAULT
#endif