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FastRIO v2 bench: CLEAN — ACK-wait widening eliminates the retry storm

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192s mash at 31250 with the $D9E7 wait fix: framing 5655 -> 54
(-99.4%), AbandonCount 65 -> +0, duplicate replies gone (215% -> 88.6%
of poll slots — identical to the healthy 9600 profile, the structural
$D758 drop-gate ratio), zero wedges, counters perfectly flat. The
byte-clocked ACK-wait theory is confirmed end to end: disassembly
predicted the mechanism, one operand byte fixed it, the wire went
quiet. Evidence log archived; results table in ANALYSIS.md.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Cyd
2026-07-18 11:13:38 -05:00
co-authored by Claude Fable 5
parent dd41a3a411
commit f489bd340e
2 changed files with 54 additions and 0 deletions
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testlogs/riomash-patched-31250v2-20260718-110853.log
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== RIO mash test :: COM1 @ 31250 8N1, 300s, chip label 'patched-31250v2' ==
lamp echo ON (drives reply/lamp collisions), wedge threshold 2.0s, app auto-recovery DISABLED
log: C:\VWE\riojoy\riomash-patched-31250v2-20260718-110853.log
firmware: 4.2
counters before: RestartCount=0 AbandonCount=0 FullBufferCount=0 [board/lamp faults reported!]
>>> MASH NOW: two hands, 8 lamp buttons, as fast as you can. <<<
>>> Test runs 300s. A wedge alarm will beep + banner. <<<
>>> Ctrl+C ends the run early and still prints the summary. <<<
[ 33.03s] progress: presses=63 (63/min) analog=523 maxGap=0.28s wedges=0
[ 63.05s] progress: presses=165 (157/min) analog=1002 maxGap=0.28s wedges=0
[ 93.08s] progress: presses=185 (119/min) analog=1481 maxGap=0.28s wedges=0
[ 123.11s] progress: presses=347 (169/min) analog=1958 maxGap=0.28s wedges=0
[ 153.22s] progress: presses=504 (197/min) analog=2440 maxGap=0.28s wedges=0
[ 183.26s] progress: presses=763 (250/min) analog=2919 maxGap=0.28s wedges=0
[ 191.98s] operator stop (Ctrl+C) — ending run, snapshotting counters...
== MASH SUMMARY [patched-31250v2] ==
run : 191s on COM1, lamps on, wedge threshold 2.0s
firmware : 4.2
presses/releases : 775 / 775 (241 presses/min)
analog replies : 3076 (~3472 poll slots; 88.6%), sentinels 0
framing / NAK : 54 / 5
gap histogram : <100ms:3068 100-250ms:5 250-500ms:2 0.5-1s:0 1-2s:0 2-5s:0 >5s:0
longest gaps : 0.30s@192.0s, 0.28s@1.8s, 0.14s@57.2s, 0.13s@107.8s, 0.12s@98.5s, 0.11s@130.9s, 0.10s@165.4s, 0.10s@24.5s, 0.10s@151.9s, 0.10s@167.4s
wedge events : 0
counters before : RestartCount=0 AbandonCount=0 FullBufferCount=0 [board/lamp faults reported!]
counters after : RestartCount=0 AbandonCount=0 FullBufferCount=0 [board/lamp faults reported!]
counter delta : RestartCount=+0 AbandonCount=+0 FullBufferCount=+0
verdict : PASS — no wedge; compare gap histogram + counter delta to baseline
log file : C:\VWE\riojoy\riomash-patched-31250v2-20260718-110853.log