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hakmem/core/front/tiny_unified_cache.d

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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
core/front/tiny_unified_cache.o: core/front/tiny_unified_cache.c \
core/front/tiny_unified_cache.h core/front/../hakmem_build_flags.h \
core/front/../hakmem_tiny_config.h core/front/../box/unified_batch_box.h \
core/front/../tiny_tls.h core/front/../hakmem_tiny_superslab.h \
core/front/../superslab/superslab_types.h \
core/hakmem_tiny_superslab_constants.h \
core/front/../superslab/superslab_inline.h \
core/front/../superslab/superslab_types.h \
core/front/../tiny_debug_ring.h core/front/../hakmem_build_flags.h \
core/front/../tiny_remote.h \
core/front/../hakmem_tiny_superslab_constants.h \
core/front/../tiny_box_geometry.h core/front/../hakmem_tiny_config.h \
core/front/../box/tiny_next_ptr_box.h core/hakmem_tiny_config.h \
core/tiny_nextptr.h core/hakmem_build_flags.h \
core/front/../hakmem_tiny_superslab.h \
core/front/../superslab/superslab_inline.h \
core/front/../box/pagefault_telemetry_box.h
core/front/tiny_unified_cache.h:
core/front/../hakmem_build_flags.h:
core/front/../hakmem_tiny_config.h:
core/front/../box/unified_batch_box.h:
core/front/../tiny_tls.h:
core/front/../hakmem_tiny_superslab.h:
core/front/../superslab/superslab_types.h:
core/hakmem_tiny_superslab_constants.h:
core/front/../superslab/superslab_inline.h:
core/front/../superslab/superslab_types.h:
core/front/../tiny_debug_ring.h:
core/front/../hakmem_build_flags.h:
core/front/../tiny_remote.h:
core/front/../hakmem_tiny_superslab_constants.h:
core/front/../tiny_box_geometry.h:
core/front/../hakmem_tiny_config.h:
core/front/../box/tiny_next_ptr_box.h:
core/hakmem_tiny_config.h:
core/tiny_nextptr.h:
core/hakmem_build_flags.h:
core/front/../hakmem_tiny_superslab.h:
core/front/../superslab/superslab_inline.h:
core/front/../box/pagefault_telemetry_box.h:
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