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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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Makefile.starkernel
+4 -1
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@@ -281,6 +281,8 @@ $(eval $(call kconfig_int,STADIUM_MAX_VM_COUNT,4))
$(eval $(call kconfig_int,STADIUM_CONTAINS_DEPTH_MAX,5))
$(eval $(call kconfig_int,STADIUM_CAPACITY_TICK,1000))
$(eval $(call kconfig_int,STADIUM_MEMORY_PERCENT,1))
$(eval $(call kconfig_int,STADIUM_WORD_HEAT_QUANTUM,2048))
$(eval $(call kconfig_int,STADIUM_WORD_COOL_RATE_Q48,21845))
$(eval $(call kconfig_int,SSM_ENTROPY_HIGH_THRESHOLD,0.75))
$(eval $(call kconfig_int,SSM_CV_HIGH_THRESHOLD,0.15))
$(eval $(call kconfig_int,SSM_TEMPORAL_DECAY_THRESHOLD,0.5))
@@ -455,7 +457,8 @@ LOADER_EXTRA_SRCS := \
$(KERNEL_SRC)/vm/vm_runtime.c \
$(KERNEL_SRC)/vm/alloc_kernel.c \
$(KERNEL_SRC)/vm/q48_stubs.c \
$(KERNEL_SRC)/vm/stadium.c
$(KERNEL_SRC)/vm/stadium.c \
$(KERNEL_SRC)/vm/stadium_words.c
KERNEL_EXTRA_SRCS := $(LOADER_EXTRA_SRCS)