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FABRIC.md: 4.4g stays open (reorder not viable), add urgent item 4.6 (-O0 kernel build)

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Attempted 4.4g's console_fb_init() reorder twice this session: once bare,
once with the fb_scroll_rows() volatile fix applied. Both stalled boot
indefinitely (12,000+ lines logged, still running after 3 minutes vs. a
normal few-second boot) instead of completing. Root cause traced past the
scroll fix to Makefile.starkernel building the kernel at -O0 -- no
optimization flag has ever been configured there, verified against the
file's full git history (17 commits, only ever one unrelated host-tool -O2
line). Both the kernel's own vendored hosted Makefile and the standalone
StarForth repo's Makefile default to -O2 (up to -O3/-flto on faster
targets); Makefile.starkernel was written fresh for the bare-metal target
and never got that ladder.

Documented as new item 4.6: enabling optimization is not a safe drop-in
change on its own. Found one confirmed, isolated correctness hazard first --
TimeTrustState.ticks (timer.h:90) is written directly in ISR context on all
three architectures (heartbeat.c:163) and read directly by mainline
(heartbeat.c:200-202, including a busy-wait in kernel_main.c:880) without
being volatile, unlike every other ISR-shared global checked
(g_spurious_count, g_plic_claim_count, g_pending_counter/g_pending_valid/
g_adaptive_period_ns are all correctly volatile already). Reverted the
console_fb_init() reorder itself (uncommitted, so a plain git restore) --
4.4g stays open pending 4.6.

Both the reorder attempts' logs (stalled, never reached ok>) and this
session's routine three-arch artifacts (capsules/BLOCK_MAP.md, disk/
artemis.img, DOE CSV) are committed as audit trail per CLAUDE.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Robert Allan James
2026-08-11 09:42:35 -04:00
co-authored by Claude Sonnet 5
parent e211707e2d
commit b42308762b
8 changed files with 43558 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files
experiments/bare_metal/latest/amd64.csv
+20 -20
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@@ -75,36 +75,36 @@ tick_number,elapsed_ns,tick_interval_ns,cache_hits_delta,bucket_hits_delta,word_
1,10000,18446744073708831616,0,0,117,4,4,4096,0,0,4895412794951728796,12,65536,0,0,65536,0,0
2,20000,10000,0,0,78,10,7,4096,0,0,0,13,65536,0,0,65536,0,0
3,30000,10000,0,0,101,13,7,4096,0,0,0,15,65536,0,0,65536,0,0
4,40000,10000,0,0,63,19,8,4096,0,0,0,15,65536,0,0,65536,0,0
4,40000,10000,0,0,63,19,8,4096,0,0,0,16,65536,0,0,65536,0,0
5,50000,10000,0,0,92,25,8,4096,2,0,0,18,65536,0,0,65536,0,0
6,60000,10000,0,0,64,27,8,4096,2,0,0,19,65536,0,0,65536,0,0
7,70000,10000,0,0,228,32,8,4096,210,0,0,25,65536,0,0,65536,0,0
8,80000,10000,0,0,256,34,9,4096,466,0,0,31,65536,0,0,65536,0,0
9,90000,10000,0,0,256,36,10,4096,722,0,0,37,65536,0,0,65536,0,0
10,100000,10000,0,0,256,36,11,4096,978,0,0,43,65536,0,0,65536,0,0
11,110000,10000,0,0,256,36,11,4096,1234,0,0,49,65536,0,0,65536,0,0
12,120000,10000,0,0,256,36,12,4096,1490,0,0,55,65536,0,0,65536,0,0
10,100000,10000,0,0,256,36,11,4096,978,0,0,44,65536,0,0,65536,0,0
11,110000,10000,0,0,256,36,11,4096,1234,0,0,50,65536,0,0,65536,0,0
12,120000,10000,0,0,256,36,12,4096,1490,0,0,56,65536,0,0,65536,0,0
13,130000,10000,0,0,256,37,12,4096,1746,0,0,62,65536,0,0,65536,0,0
14,140000,10000,0,0,230,39,12,4096,1949,0,0,68,65536,0,0,65536,0,0
15,150000,10000,0,0,256,39,13,4096,2204,0,0,74,65536,0,0,65536,0,0
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34,340000,10000,0,0,256,45,27,256,256,0,0,194,65536,0,1,65536,0,0
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32,320000,10000,0,0,255,45,26,256,256,0,0,183,65536,0,1,65536,0,0
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34,340000,10000,0,0,256,45,27,256,256,0,0,195,65536,0,1,65536,0,0
35,350000,10000,0,0,256,45,28,256,256,0,0,201,65536,0,1,65536,0,0
36,360000,10000,0,0,256,45,29,256,256,0,0,207,65536,0,1,65536,0,0
36,360000,10000,0,0,256,45,29,256,256,0,0,208,65536,0,1,65536,0,0
1 tick_number elapsed_ns tick_interval_ns cache_hits_delta bucket_hits_delta word_executions_delta hot_word_count avg_word_heat_q48 window_width actual_window_size predicted_label_hits jitter_bits apic_ticks time_trust_q48 variance_q48 vm_call_depth_max hera_heat_q48 hermes_heat_q48 artemis_heat_q48
75 1 10000 18446744073708831616 0 0 117 4 4 4096 0 0 4895412794951728796 12 65536 0 0 65536 0 0
76 2 20000 10000 0 0 78 10 7 4096 0 0 0 13 65536 0 0 65536 0 0
77 3 30000 10000 0 0 101 13 7 4096 0 0 0 15 65536 0 0 65536 0 0
78 4 40000 10000 0 0 63 19 8 4096 0 0 0 15 16 65536 0 0 65536 0 0
79 5 50000 10000 0 0 92 25 8 4096 2 0 0 18 65536 0 0 65536 0 0
80 6 60000 10000 0 0 64 27 8 4096 2 0 0 19 65536 0 0 65536 0 0
81 7 70000 10000 0 0 228 32 8 4096 210 0 0 25 65536 0 0 65536 0 0
82 8 80000 10000 0 0 256 34 9 4096 466 0 0 31 65536 0 0 65536 0 0
83 9 90000 10000 0 0 256 36 10 4096 722 0 0 37 65536 0 0 65536 0 0
84 10 100000 10000 0 0 256 36 11 4096 978 0 0 43 44 65536 0 0 65536 0 0
85 11 110000 10000 0 0 256 36 11 4096 1234 0 0 49 50 65536 0 0 65536 0 0
86 12 120000 10000 0 0 256 36 12 4096 1490 0 0 55 56 65536 0 0 65536 0 0
87 13 130000 10000 0 0 256 37 12 4096 1746 0 0 62 65536 0 0 65536 0 0
88 14 140000 10000 0 0 230 39 12 4096 1949 0 0 68 65536 0 0 65536 0 0
89 15 150000 10000 0 0 256 39 13 4096 2204 0 0 74 65536 0 0 65536 0 0
90 16 160000 10000 0 0 256 39 14 4096 2459 0 0 80 65536 0 0 65536 0 0
91 17 170000 10000 0 0 256 39 15 4096 2713 0 0 86 87 65536 0 0 65536 0 0
92 18 180000 10000 0 0 256 39 15 4096 2969 0 0 93 65536 0 0 65536 0 0
93 19 190000 10000 0 0 256 39 16 4096 3224 0 0 99 65536 0 1 65536 0 0
94 20 200000 10000 0 0 256 41 17 4096 3480 0 0 105 106 65536 0 1 65536 0 0
95 21 210000 10000 0 0 256 41 17 4096 3736 0 0 111 112 65536 0 1 65536 0 0
96 22 220000 10000 0 0 256 41 18 4096 3992 0 0 120 65536 0 1 65536 0 0
97 23 230000 10000 0 0 256 41 19 4096 4096 0 0 126 127 65536 0 1 65536 0 0
98 24 240000 10000 0 0 256 41 20 4096 4096 0 0 132 133 65536 0 1 65536 0 0
99 25 250000 10000 0 0 256 43 20 2048 2048 0 0 138 139 65536 0 1 65536 0 0
100 26 260000 10000 0 0 256 45 21 2048 2048 0 0 145 146 65536 0 1 65536 0 0
101 27 270000 10000 0 0 256 45 22 1024 1024 0 0 151 152 65536 0 1 65536 0 0
102 28 280000 10000 0 0 256 45 23 1024 1024 0 0 157 158 65536 0 1 65536 0 0
103 29 290000 10000 0 0 256 45 24 512 512 0 0 164 165 65536 0 1 65536 0 0
104 30 300000 10000 0 0 256 45 24 512 512 0 0 170 171 65536 0 1 65536 0 0
105 31 310000 10000 0 0 256 45 25 256 256 0 0 176 177 65536 0 1 65536 0 0
106 32 320000 10000 0 0 255 45 26 256 256 0 0 182 183 65536 0 1 65536 0 0
107 33 330000 10000 0 0 256 45 27 256 256 0 0 188 189 65536 0 1 65536 0 0
108 34 340000 10000 0 0 256 45 27 256 256 0 0 194 195 65536 0 1 65536 0 0
109 35 350000 10000 0 0 256 45 28 256 256 0 0 201 65536 0 1 65536 0 0
110 36 360000 10000 0 0 256 45 29 256 256 0 0 207 208 65536 0 1 65536 0 0