I made a zero-copy coroutine tracer to find my scheduler's lost wakeups
Details
- External ID
- 47230620
- Source
- HN
- Company
- —
- Product
- I made a zero-copy coroutine tracer to find my scheduler's lost wakeups
- Website domain
- github.com
- Launched
- March 3, 2026
- Cohort
- —
- Upvotes
- 49
- Upvotes percentile
- 0.8388683886838868
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Enrichment
- Theme
- sleep, wake, and clock utilities
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- zero-copy coroutine tracer for scheduler debugging
- Manually corrected
- False
Could you build this?
No Writing a zero-copy, low-overhead tracer for asynchronous coroutines and scheduler debugging requires advanced low-level runtime internals and lock-free systems programming.
What it would actually take: This requires tapping directly into runtime coroutine scheduling events via eBPF, compiler instrumentation, or custom runtime hooks using lock-free ring buffers (like ringbuf or perf buffers) to prevent thread contention. The critical difficulty is ensuring tracepoints have zero memory allocation, nanosecond-level overhead, and preserve precise instruction reordering guarantees to detect lost race-condition wakeups. This demands low-level systems programming in C, C++, or Rust with deep knowledge of concurrency and OS kernel primitives.
Discussion
3 comments analyzed.
Concerns raised: Missed wakeups in signaling logic without proper memory ordering, Early prototype stage, architecture needs validation
Feature requests: Add #StoreLoad fence between slot.seq store and sleeping flag load, Implement acquire semantics for load operations, Add timeout on sleep to handle cases without subsequent traces
Competitors
Other products that read as similar to this one — 198 launches clear the similarity bar, closest 8 shown.
Attention rank: #26 of 199 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 123 days after the earliest competitor.
- ChronoLeaf · github · 2026-09-19 · 35 upvotes · similarity 0.49
- Kipless · github · 2026-09-11 · 7 upvotes · similarity 0.46
- sleep-not-allowed · github · 2026-09-11 · 9 upvotes · similarity 0.46
- genpark-vector-clock-causal-order-tracker-skill · github · 2026-09-28 · 7 upvotes · similarity 0.45
- Daymon · hn · 2026-02-17 · 6 upvotes · similarity 0.45
- genpark-personal-circadian-energy-scheduler-skill · github · 2026-09-26 · 7 upvotes · similarity 0.44
- genpark-personal-circadian-energy-scheduler-skill · github · 2026-09-26 · 7 upvotes · similarity 0.44
- codex-clock · github · 2026-09-15 · 7 upvotes · similarity 0.44
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a dev tools tool for Sales yet.