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hakmem/hakmem.d
Moe Charm (CI) 03ba62df4d Phase 23 Unified Cache + PageFaultTelemetry generalization: Mid/VM page-fault bottleneck identified 
Summary:
- Phase 23 Unified Cache: +30% improvement (Random Mixed 256B: 18.18M → 23.68M ops/s)
- PageFaultTelemetry: Extended to generic buckets (C0-C7, MID, L25, SSM)
- Measurement-driven decision: Mid/VM page-faults (80-100K) >> Tiny (6K) → prioritize Mid/VM optimization

Phase 23 Changes:
1. Unified Cache implementation (core/front/tiny_unified_cache.{c,h})
   - Direct SuperSlab carve (TLS SLL bypass)
   - Self-contained pop-or-refill pattern
   - ENV: HAKMEM_TINY_UNIFIED_CACHE=1, HAKMEM_TINY_UNIFIED_C{0-7}=128

2. Fast path pruning (tiny_alloc_fast.inc.h, tiny_free_fast_v2.inc.h)
   - Unified ON → direct cache access (skip all intermediate layers)
   - Alloc: unified_cache_pop_or_refill() → immediate fail to slow
   - Free: unified_cache_push() → fallback to SLL only if full

PageFaultTelemetry Changes:
3. Generic bucket architecture (core/box/pagefault_telemetry_box.{c,h})
   - PF_BUCKET_{C0-C7, MID, L25, SSM} for domain-specific measurement
   - Integration: hak_pool_try_alloc(), l25_alloc_new_run(), shared_pool_allocate_superslab_unlocked()

4. Measurement results (Random Mixed 500K / 256B):
   - Tiny C2-C7: 2-33 pages, high reuse (64-3.8 touches/page)
   - SSM: 512 pages (initialization footprint)
   - MID/L25: 0 (unused in this workload)
   - Mid/Large VM benchmarks: 80-100K page-faults (13-16x higher than Tiny)

Ring Cache Enhancements:
5. Hot Ring Cache (core/front/tiny_ring_cache.{c,h})
   - ENV: HAKMEM_TINY_HOT_RING_ENABLE=1, HAKMEM_TINY_HOT_RING_C{0-7}=size
   - Conditional compilation cleanup

Documentation:
6. Analysis reports
   - RANDOM_MIXED_BOTTLENECK_ANALYSIS.md: Page-fault breakdown
   - RANDOM_MIXED_SUMMARY.md: Phase 23 summary
   - RING_CACHE_ACTIVATION_GUIDE.md: Ring cache usage
   - CURRENT_TASK.md: Updated with Phase 23 results and Phase 24 plan

Next Steps (Phase 24):
- Target: Mid/VM PageArena/HotSpanBox (page-fault reduction 80-100K → 30-40K)
- Tiny SSM optimization deferred (low ROI, ~6K page-faults already optimal)
- Expected improvement: +30-50% for Mid/Large workloads

Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-17 02:47:58 +09:00

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hakmem.o: core/hakmem.c core/hakmem.h core/hakmem_build_flags.h \
core/hakmem_config.h core/hakmem_features.h core/hakmem_internal.h \
core/hakmem_sys.h core/hakmem_whale.h core/hakmem_bigcache.h \
core/hakmem_pool.h core/hakmem_l25_pool.h core/hakmem_policy.h \
core/hakmem_learner.h core/hakmem_size_hist.h core/hakmem_ace.h \
core/hakmem_site_rules.h core/hakmem_tiny.h core/hakmem_trace.h \
core/hakmem_tiny_mini_mag.h core/hakmem_tiny_superslab.h \
core/superslab/superslab_types.h core/hakmem_tiny_superslab_constants.h \
core/superslab/superslab_inline.h core/superslab/superslab_types.h \
core/tiny_debug_ring.h core/tiny_remote.h \
core/hakmem_tiny_superslab_constants.h core/tiny_fastcache.h \
core/box/tiny_next_ptr_box.h core/hakmem_tiny_config.h \
core/tiny_nextptr.h core/hakmem_mid_mt.h core/hakmem_super_registry.h \
core/hakmem_elo.h core/hakmem_ace_stats.h core/hakmem_batch.h \
core/hakmem_evo.h core/hakmem_debug.h core/hakmem_prof.h \
core/hakmem_syscall.h core/hakmem_ace_controller.h \
core/hakmem_ace_metrics.h core/hakmem_ace_ucb1.h \
core/box/bench_fast_box.h core/ptr_trace.h core/box/hak_exit_debug.inc.h \
core/box/hak_kpi_util.inc.h core/box/hak_core_init.inc.h \
core/hakmem_phase7_config.h core/box/ss_hot_prewarm_box.h \
core/box/hak_alloc_api.inc.h core/box/../hakmem_tiny.h \
core/box/../hakmem_smallmid.h core/box/hak_free_api.inc.h \
core/hakmem_tiny_superslab.h core/box/../tiny_free_fast_v2.inc.h \
core/box/../tiny_region_id.h core/box/../hakmem_build_flags.h \
core/box/../tiny_box_geometry.h \
core/box/../hakmem_tiny_superslab_constants.h \
core/box/../hakmem_tiny_config.h core/box/../ptr_track.h \
core/box/../box/tls_sll_box.h core/box/../box/../hakmem_tiny_config.h \
core/box/../box/../hakmem_build_flags.h core/box/../box/../tiny_remote.h \
core/box/../box/../tiny_region_id.h \
core/box/../box/../hakmem_tiny_integrity.h \
core/box/../box/../hakmem_tiny.h core/box/../box/../ptr_track.h \
core/box/../box/../tiny_debug_ring.h core/box/../box/tls_sll_drain_box.h \
core/box/../box/tls_sll_box.h core/box/../box/free_local_box.h \
core/box/../hakmem_tiny_integrity.h core/box/../front/tiny_heap_v2.h \
core/box/../front/../hakmem_tiny.h core/box/../front/tiny_ultra_hot.h \
core/box/../front/../box/tls_sll_box.h \
core/box/../front/tiny_ring_cache.h \
core/box/../front/../hakmem_build_flags.h \
core/box/../front/tiny_unified_cache.h \
core/box/../front/../hakmem_tiny_config.h \
core/box/../superslab/superslab_inline.h \
core/box/../box/free_remote_box.h core/box/front_gate_v2.h \
core/box/external_guard_box.h core/box/hak_wrappers.inc.h \
core/box/front_gate_classifier.h
core/hakmem.h:
core/hakmem_build_flags.h:
core/hakmem_config.h:
core/hakmem_features.h:
core/hakmem_internal.h:
core/hakmem_sys.h:
core/hakmem_whale.h:
core/hakmem_bigcache.h:
core/hakmem_pool.h:
core/hakmem_l25_pool.h:
core/hakmem_policy.h:
core/hakmem_learner.h:
core/hakmem_size_hist.h:
core/hakmem_ace.h:
core/hakmem_site_rules.h:
core/hakmem_tiny.h:
core/hakmem_trace.h:
core/hakmem_tiny_mini_mag.h:
core/hakmem_tiny_superslab.h:
core/superslab/superslab_types.h:
core/hakmem_tiny_superslab_constants.h:
core/superslab/superslab_inline.h:
core/superslab/superslab_types.h:
core/tiny_debug_ring.h:
core/tiny_remote.h:
core/hakmem_tiny_superslab_constants.h:
core/tiny_fastcache.h:
core/box/tiny_next_ptr_box.h:
core/hakmem_tiny_config.h:
core/tiny_nextptr.h:
core/hakmem_mid_mt.h:
core/hakmem_super_registry.h:
core/hakmem_elo.h:
core/hakmem_ace_stats.h:
core/hakmem_batch.h:
core/hakmem_evo.h:
core/hakmem_debug.h:
core/hakmem_prof.h:
core/hakmem_syscall.h:
core/hakmem_ace_controller.h:
core/hakmem_ace_metrics.h:
core/hakmem_ace_ucb1.h:
core/box/bench_fast_box.h:
core/ptr_trace.h:
core/box/hak_exit_debug.inc.h:
core/box/hak_kpi_util.inc.h:
core/box/hak_core_init.inc.h:
core/hakmem_phase7_config.h:
core/box/ss_hot_prewarm_box.h:
core/box/hak_alloc_api.inc.h:
core/box/../hakmem_tiny.h:
core/box/../hakmem_smallmid.h:
core/box/hak_free_api.inc.h:
core/hakmem_tiny_superslab.h:
core/box/../tiny_free_fast_v2.inc.h:
core/box/../tiny_region_id.h:
core/box/../hakmem_build_flags.h:
core/box/../tiny_box_geometry.h:
core/box/../hakmem_tiny_superslab_constants.h:
core/box/../hakmem_tiny_config.h:
core/box/../ptr_track.h:
core/box/../box/tls_sll_box.h:
core/box/../box/../hakmem_tiny_config.h:
core/box/../box/../hakmem_build_flags.h:
core/box/../box/../tiny_remote.h:
core/box/../box/../tiny_region_id.h:
core/box/../box/../hakmem_tiny_integrity.h:
core/box/../box/../hakmem_tiny.h:
core/box/../box/../ptr_track.h:
core/box/../box/../tiny_debug_ring.h:
core/box/../box/tls_sll_drain_box.h:
core/box/../box/tls_sll_box.h:
core/box/../box/free_local_box.h:
core/box/../hakmem_tiny_integrity.h:
core/box/../front/tiny_heap_v2.h:
core/box/../front/../hakmem_tiny.h:
core/box/../front/tiny_ultra_hot.h:
core/box/../front/../box/tls_sll_box.h:
core/box/../front/tiny_ring_cache.h:
core/box/../front/../hakmem_build_flags.h:
core/box/../front/tiny_unified_cache.h:
core/box/../front/../hakmem_tiny_config.h:
core/box/../superslab/superslab_inline.h:
core/box/../box/free_remote_box.h:
core/box/front_gate_v2.h:
core/box/external_guard_box.h:
core/box/hak_wrappers.inc.h:
core/box/front_gate_classifier.h:
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