feat(host): watchdog timer for heartbeat monitoring (W73, R-HS-21) by gHashTag · Pull Request #860 · gHashTag/t27

gHashTag · 2026-05-24T10:29:03Z

Closes #859

Wave 73 (R-HS-21): Host watchdog timer

What

New bootstrap/src/host/watchdog.rs
WatchdogTimer: state machine (Idle→Running→Expired/Stopped)
start/feed/check/stop/reset, missed heartbeat tracking
WatchdogConfig builder, WatchdogStats

Tests

19 new inline tests, all pass. 835 total.

github-actions · 2026-05-24T10:29:12Z

📓 NotebookLM Notebook linked to this PR

Notebook ID: b83263109fb055dc
URL: https://notebooklm.google.com/notebook/b83263109fb055dc

This notebook contains session context, decisions, and artifacts for this work.

github-actions · 2026-05-24T10:29:16Z

PR Dashboard

Generated at: 2026-05-24 10:29:14 UTC

feat(host): watchdog timer for heartbeat monitoring (W73, R-HS-21) #860 feat(host): watchdog timer for heartbeat monitoring (W73, R-HS-21) | Created: 2026-05-24 | Updated: 2026-05-24 | 8 failing / 15 total
feat(host): inference pipeline state machine (W72, R-HS-20) #858 feat(host): inference pipeline state machine (W72, R-HS-20) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): memory pool for DMA buffer management (W71, R-HS-19) #856 feat(host): memory pool for DMA buffer management (W71, R-HS-19) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): typed register map with field accessors (W70, R-HS-18) #854 feat(host): typed register map with field accessors (W70, R-HS-18) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): session manager with seq tracking and retry (W69, R-HS-17) #852 feat(host): session manager with seq tracking and retry (W69, R-HS-17) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): transport layer with length-prefix + CRC framing (W68, R-HS-16) #850 feat(host): transport layer with length-prefix + CRC framing (W68, R-HS-16) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): command protocol for host-to-FPGA framing (W67, R-HS-15) #848 feat(host): command protocol for host-to-FPGA framing (W67, R-HS-15) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): weight format header parser (W66, R-HS-14) #846 feat(host): weight format header parser (W66, R-HS-14) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): bitstream reader for weight format parsing (W65, R-HS-13) #844 feat(host): bitstream reader for weight format parsing (W65, R-HS-13) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): ring buffer for DMA streaming (W64, R-HS-12) #842 feat(host): ring buffer for DMA streaming (W64, R-HS-12) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): scatter/gather DMA descriptor (W63, R-HS-11) #840 feat(host): scatter/gather DMA descriptor (W63, R-HS-11) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(compiler): strengthen AST constant folding (W62, R-CO-1) #838 feat(compiler): strengthen AST constant folding (W62, R-CO-1) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): weight loader with CRC32 and ternary validation (W61, R-HS-10) #836 feat(host): weight loader with CRC32 and ternary validation (W61, R-HS-10) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(compiler): for-range loop for i in start..end (W60, R-CG-7) #834 feat(compiler): for-range loop for i in start..end (W60, R-CG-7) | Created: 2026-05-24 | Updated: 2026-05-24 | 4 failing / 24 total
feat(host): DMA channel model with CRC32 integrity (W59, R-HS-9) #832 feat(host): DMA channel model with CRC32 integrity (W59, R-HS-9) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): CRC32 checksum for weight word transport integrity (W58, R-HS-8) #830 feat(host): CRC32 checksum for weight word transport integrity (W58, R-HS-8) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
feat(compiler): bit replication operator {N{expr}} (Wave 57, R-CG-6) #828 feat(compiler): bit replication operator {N{expr}} (Wave 57, R-CG-6) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
feat(compiler): ternary conditional operator cond ? a : b (Wave 56, R-CG-5) #826 feat(compiler): ternary conditional operator cond ? a : b (Wave 56, R-CG-5) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
feat(compiler): bit concatenation operator {a, b, ...} (Wave 55, R-CG-4) #824 feat(compiler): bit concatenation operator {a, b, ...} (Wave 55, R-CG-4) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
feat(compiler): bit-range part-select operator [hi:lo] (Wave 54, R-CG-3) #822 feat(compiler): bit-range part-select operator [hi:lo] (Wave 54, R-CG-3) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
chore(bootstrap): dead code warning sweep (Wave 53, R-HY-1) #820 chore(bootstrap): dead code warning sweep (Wave 53, R-HY-1) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
feat(bootstrap): host-side weight validator (Wave 52, R-HS-7) #818 feat(bootstrap): host-side weight validator (Wave 52, R-HS-7) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
feat(compiler): compound assignment operators across all backends (Wave 51, R-CG-2) #816 feat(compiler): compound assignment operators across all backends (Wave 51, R-CG-2) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
feat(bootstrap): tt-debug wrapper -- observability layer for Tiny Tapeout silicon (Wave 50, R-TT-3) #814 feat(bootstrap): tt-debug wrapper -- observability layer for Tiny Tapeout silicon (Wave 50, R-TT-3) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
feat(compiler): cast operator across all backends (Wave 49, R-CG-1) #813 feat(compiler): cast operator across all backends (Wave 49, R-CG-1) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 3 total
fix(bootstrap): JWT test failures — jsonwebtoken CryptoProvider (Wave 48, R-TR-2) #810 fix(bootstrap): JWT test failures — jsonwebtoken CryptoProvider (Wave 48, R-TR-2) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 7 total
fix(bootstrap): pre-existing test failures — ternary + cast operator (Wave 47, R-TR-1) #808 fix(bootstrap): pre-existing test failures — ternary + cast operator (Wave 47, R-TR-1) | Created: 2026-05-24 | Updated: 2026-05-24 | 0 failing / 7 total
feat(bootstrap): end-to-end host stack integration (Wave 46, R-HS-6) #803 feat(bootstrap): end-to-end host stack integration (Wave 46, R-HS-6) | Created: 2026-05-23 | Updated: 2026-05-23 | 0 failing / 3 total
feat(bootstrap): deterministic weight pattern generator (Wave 45, R-HT-2) #801 feat(bootstrap): deterministic weight pattern generator (Wave 45, R-HT-2) | Created: 2026-05-23 | Updated: 2026-05-23 | 0 failing / 3 total
feat(bootstrap): ternary weight packer/unpacker (Wave 44, R-HT-1) #798 feat(bootstrap): ternary weight packer/unpacker (Wave 44, R-HT-1) | Created: 2026-05-23 | Updated: 2026-05-23 | 0 failing / 3 total
feat(bootstrap): --json flag for all host CLI commands (Wave 43, R-HS-5) #796 feat(bootstrap): --json flag for all host CLI commands (Wave 43, R-HS-5) | Created: 2026-05-23 | Updated: 2026-05-23 | 0 failing / 3 total
feat(bootstrap): host performance model and cycle estimator (Wave 42, R-HS-4) #793 feat(bootstrap): host performance model and cycle estimator (Wave 42, R-HS-4) | Created: 2026-05-23 | Updated: 2026-05-23 | 0 failing / 3 total
feat(bootstrap): host DMA-driven multi-layer inference flow (Wave 41, R-HS-3) #790 feat(bootstrap): host DMA-driven multi-layer inference flow (Wave 41, R-HS-3) | Created: 2026-05-23 | Updated: 2026-05-23 | 0 failing / 3 total
feat(bootstrap): host IRQ-handler harness + poll-vs-IRQ comparison (Wave 40, R-HS-2) #788 feat(bootstrap): host IRQ-handler harness + poll-vs-IRQ comparison (Wave 40, R-HS-2) | Created: 2026-05-23 | Updated: 2026-05-23 | 0 failing / 3 total

Summary

Status	Count
Total Open PRs	34
PRs with Failing Checks	14
PRs with All Checks Green	20
READY	19
FAILING	14
PENDING	0

Wave 73 (R-HS-21): WatchdogTimer with start/feed/check/stop, missed heartbeat tracking, WatchdogConfig builder. 19 new tests. 835 total.

github-actions · 2026-05-30T15:31:10Z

📓 NotebookLM Notebook linked to this PR

Notebook ID: b83263109fb055dc
URL: https://notebooklm.google.com/notebook/b83263109fb055dc

This notebook contains session context, decisions, and artifacts for this work.

github-actions · 2026-05-30T15:32:06Z

PR Dashboard

Generated at: 2026-05-30 15:32:03 UTC

feat(host): endpoint registry (W98, R-HS-46) #910 feat(host): endpoint registry (W98, R-HS-46) | Created: 2026-05-24 | Updated: 2026-05-24 | 6 failing / 24 total
feat(host): shutdown coordinator (W97, R-HS-45) #908 feat(host): shutdown coordinator (W97, R-HS-45) | Created: 2026-05-24 | Updated: 2026-05-24 | 6 failing / 24 total
feat(host): serializer (W96, R-HS-44) #906 feat(host): serializer (W96, R-HS-44) | Created: 2026-05-24 | Updated: 2026-05-24 | 6 failing / 24 total
feat(host): config registry (W95, R-HS-43) #904 feat(host): config registry (W95, R-HS-43) | Created: 2026-05-24 | Updated: 2026-05-24 | 6 failing / 24 total
feat(host): bitmask utilities (W94, R-HS-42) #902 feat(host): bitmask utilities (W94, R-HS-42) | Created: 2026-05-24 | Updated: 2026-05-24 | 6 failing / 24 total
feat(host): health monitor (W93, R-HS-41) #900 feat(host): health monitor (W93, R-HS-41) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): interrupt router (W92, R-HS-40) #898 feat(host): interrupt router (W92, R-HS-40) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): register cache (W91, R-HS-39) #896 feat(host): register cache (W91, R-HS-39) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): descriptor ring (W90, R-HS-38) #894 feat(host): descriptor ring (W90, R-HS-38) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): capability flags (W89, R-HS-37) #892 feat(host): capability flags (W89, R-HS-37) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): operation logger (W88, R-HS-36) #890 feat(host): operation logger (W88, R-HS-36) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): rate limiter (W87, R-HS-35) #888 feat(host): rate limiter (W87, R-HS-35) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): latency histogram (W86, R-HS-34) #886 feat(host): latency histogram (W86, R-HS-34) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): error catalog with severity and recovery (W85, R-HS-33) #884 feat(host): error catalog with severity and recovery (W85, R-HS-33) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): checksum registry (W80, R-HS-28) #882 feat(host): checksum registry (W80, R-HS-28) | Created: 2026-05-24 | Updated: 2026-05-24 | 3 failing / 24 total
feat(host): version info (W84, R-HS-32) #881 feat(host): version info (W84, R-HS-32) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): telemetry exporter (W83, R-HS-31) #880 feat(host): telemetry exporter (W83, R-HS-31) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): buffer chain (W82, R-HS-30) #879 feat(host): buffer chain (W82, R-HS-30) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): address space map (W81, R-HS-29) #878 feat(host): address space map (W81, R-HS-29) | Created: 2026-05-24 | Updated: 2026-05-24 | 5 failing / 24 total
feat(host): ring buffer for DMA streaming (W64, R-HS-12) #842 feat(host): ring buffer for DMA streaming (W64, R-HS-12) | Created: 2026-05-24 | Updated: 2026-05-30 | 3 failing / 22 total
feat(compiler): strengthen AST constant folding (W62, R-CO-1) #838 feat(compiler): strengthen AST constant folding (W62, R-CO-1) | Created: 2026-05-24 | Updated: 2026-05-30 | 0 failing / 3 total

Summary

Status	Count
Total Open PRs	21
PRs with Failing Checks	20
PRs with All Checks Green	1
READY	1
FAILING	20
PENDING	0

Wave 73 (R-HS-21): WatchdogTimer with start/feed/check/stop, missed heartbeat tracking, WatchdogConfig builder. 19 new tests. 835 total. Co-authored-by: Claude <claude@anthropic.com>

feat(host): watchdog timer for heartbeat monitoring (Closes #859)

a3824ca

Wave 73 (R-HS-21): WatchdogTimer with start/feed/check/stop, missed heartbeat tracking, WatchdogConfig builder. 19 new tests. 835 total.

gHashTag force-pushed the feat/wave-73/host-watchdog branch from d63ea3f to a3824ca Compare May 30, 2026 15:30

gHashTag merged commit 8552f28 into master May 30, 2026
15 checks passed

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feat(host): watchdog timer for heartbeat monitoring (W73, R-HS-21) - #860

feat(host): watchdog timer for heartbeat monitoring (W73, R-HS-21)#860
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gHashTag commented May 24, 2026

Wave 73 (R-HS-21): Host watchdog timer

What

Tests

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