Moe Charm (CI)
f40be1a5ba
Pool TLS: Lock-free MPSC remote queue implementation
...
Problem: pool_remote_push mutex contention (67% of syscall time in futex)
Solution: Lock-free MPSC queue using atomic CAS operations
Changes:
1. core/pool_tls_remote.c - Lock-free MPSC queue
- Push: atomic_compare_exchange_weak (CAS loop, no locks!)
- Pop: atomic_exchange (steal entire chain)
- Mutex only for RemoteRec creation (rare, first-push-to-thread)
2. core/pool_tls_registry.c - Lock-free lookup
- Buckets and next pointers now atomic: _Atomic(RegEntry*)
- Lookup uses memory_order_acquire loads (no locks on hot path)
- Registration/unregistration still use mutex (rare operations)
Results:
- futex calls: 209 → 7 (-97% reduction!)
- Throughput: 0.97M → 1.0M ops/s (+3%)
- Remaining gap: 5.8x slower than System malloc (5.8M ops/s)
Key Finding:
- futex was NOT the primary bottleneck (only small % of total runtime)
- True bottleneck: 8% cache miss rate + registry lookup overhead
Thread Safety:
- MPSC: Multi-producer (CAS), Single-consumer (owner thread)
- Memory ordering: release/acquire for correctness
- No ABA problem (pointers used once, no reuse)
Next: P0 registry lookup elimination via POOL_TLS_BIND_BOX
🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com >
2025-11-14 14:29:05 +09:00
..
2025-11-14 07:55:51 +09:00
2025-11-14 05:41:49 +09:00
2025-11-14 05:41:49 +09:00
2025-11-14 01:02:00 +09:00
2025-11-11 01:47:06 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-11 01:47:06 +09:00
2025-11-05 12:31:14 +09:00
2025-11-11 01:47:06 +09:00
2025-11-05 12:31:14 +09:00
2025-11-08 17:08:00 +09:00
2025-11-08 17:08:00 +09:00
2025-11-14 06:09:02 +09:00
2025-11-11 01:47:06 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-11 01:47:06 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-13 14:05:39 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-08 12:54:52 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-06 21:54:12 +09:00
2025-11-07 01:27:04 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-14 14:18:56 +09:00
2025-11-14 07:59:33 +09:00
2025-11-11 01:47:06 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-14 06:49:32 +09:00
2025-11-13 14:45:43 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-13 06:50:20 +09:00
2025-11-05 12:31:14 +09:00
2025-11-13 06:50:20 +09:00
2025-11-13 06:50:20 +09:00
2025-11-14 01:02:00 +09:00
2025-11-05 12:31:14 +09:00
2025-11-13 06:50:20 +09:00
2025-11-13 16:33:03 +09:00
2025-11-13 06:50:20 +09:00
2025-11-07 01:27:04 +09:00
2025-11-13 14:25:54 +09:00
2025-11-13 14:25:54 +09:00
2025-11-05 12:31:14 +09:00
2025-11-14 05:41:49 +09:00
2025-11-14 05:41:49 +09:00
2025-11-13 06:50:20 +09:00
2025-11-13 06:50:20 +09:00
2025-11-13 06:50:20 +09:00
2025-11-14 01:05:30 +09:00
2025-11-12 13:57:46 +09:00
2025-11-14 01:02:00 +09:00
2025-11-13 16:33:03 +09:00
2025-11-13 16:33:03 +09:00
2025-11-05 12:31:14 +09:00
2025-11-10 16:48:20 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-14 01:02:00 +09:00
2025-11-14 05:41:49 +09:00
2025-11-14 05:41:49 +09:00
2025-11-14 05:41:49 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-13 13:32:58 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-14 01:02:00 +09:00
2025-11-07 01:27:04 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-07 01:27:04 +09:00
2025-11-14 01:02:00 +09:00
2025-11-11 00:02:24 +09:00
2025-11-14 01:02:00 +09:00
2025-11-14 06:49:32 +09:00
2025-11-14 01:02:00 +09:00
2025-11-13 05:43:31 +09:00
2025-11-13 16:33:03 +09:00
2025-11-10 16:48:20 +09:00
2025-11-13 05:21:36 +09:00
2025-11-14 05:41:49 +09:00
2025-11-14 05:41:49 +09:00
2025-11-13 06:50:20 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-05 12:31:14 +09:00
2025-11-11 01:47:06 +09:00
2025-11-05 12:31:14 +09:00
2025-11-11 01:47:06 +09:00
2025-11-10 18:04:08 +09:00
2025-11-05 12:31:14 +09:00
2025-11-09 16:49:34 +09:00
2025-11-08 23:53:25 +09:00
2025-11-14 14:18:56 +09:00
2025-11-09 18:55:50 +09:00
2025-11-09 18:55:50 +09:00
2025-11-14 14:29:05 +09:00
2025-11-09 18:55:50 +09:00
2025-11-14 14:29:05 +09:00
2025-11-09 18:55:50 +09:00
2025-11-14 14:18:56 +09:00
2025-11-09 18:55:50 +09:00
2025-11-14 01:02:00 +09:00
2025-11-13 06:50:20 +09:00
2025-11-14 01:02:00 +09:00
2025-11-13 14:25:54 +09:00
2025-11-13 14:25:54 +09:00
2025-11-14 01:05:30 +09:00
2025-11-13 13:32:58 +09:00
2025-11-14 06:09:02 +09:00
2025-11-06 21:54:12 +09:00
2025-11-14 01:02:00 +09:00
2025-11-13 06:50:20 +09:00
2025-11-14 05:41:49 +09:00
2025-11-14 05:41:49 +09:00
2025-11-13 16:33:03 +09:00
2025-11-14 01:02:00 +09:00
2025-11-14 01:02:00 +09:00
2025-11-13 06:50:20 +09:00
2025-11-13 06:50:20 +09:00
2025-11-09 23:15:02 +09:00
2025-11-14 07:09:18 +09:00
2025-11-14 01:34:59 +09:00
2025-11-14 01:02:00 +09:00
2025-11-07 01:27:04 +09:00
2025-11-13 06:50:20 +09:00
2025-11-07 01:27:04 +09:00
2025-11-05 12:31:14 +09:00
2025-11-07 01:27:04 +09:00
2025-11-07 18:07:48 +09:00
2025-11-13 06:50:20 +09:00
2025-11-07 18:07:48 +09:00
2025-11-13 06:50:20 +09:00
2025-11-07 01:27:04 +09:00
2025-11-13 16:33:03 +09:00
2025-11-05 12:31:14 +09:00
2025-11-11 21:49:05 +09:00
2025-11-07 01:27:04 +09:00
2025-11-05 12:31:14 +09:00
2025-11-14 01:02:00 +09:00
2025-11-14 06:49:32 +09:00
2025-11-06 21:54:12 +09:00
2025-11-07 22:34:24 +09:00
2025-11-05 12:31:14 +09:00