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hakmem/hakmem.d
Moe Charm (CI) fb88725a43 Phase FREE-LEGACY-OPT-6: C4 ULTRA Implementation 
Implement C4 ULTRA free TLS cache with parasitic free+alloc pattern,
achieving 99.7-99.9% elimination of C4 legacy fallback calls.

Key Features:
- TLS cache cap=64 (tuned for L1 cache fit, smaller than C5/C6's 128)
- Segment learning via ss_fast_lookup() on first free
- Free-side cache push + alloc-side TLS pop pattern
- ENV gate: HAKMEM_TINY_C4_ULTRA_FREE_ENABLED (default OFF)
- Full FREE_PATH_STATS instrumentation

Benchmark Results:
C4-heavy (65-128B range):
  - C4 legacy: 591,583 → 1,711 (-99.7%)
  - c4_ultra cache hits: ~599k (free) + ~599k (alloc)
  - Mixed load: 340,732 → 284 C4 legacy (-99.9%)

Legacy fallback reduction:
  - C4-heavy: 589,872 fewer legacy calls (-10.9% total)
  - Mixed: 340,448 fewer C4 legacy calls (-12.8% in mixed)

Performance note: ~2% throughput cost in isolated C4-heavy case,
acceptable tradeoff for 99%+ legacy elimination per class.

Files:
  NEW: core/box/tiny_c4_ultra_free_box.h/c
  NEW: core/box/tiny_c4_ultra_free_env_box.h
  MOD: core/box/tiny_ultra_classes_box.h (added C4 macros)
  MOD: core/box/free_path_stats_box.h/c (C4 ULTRA counters)
  MOD: core/front/malloc_tiny_fast.h (C4 alloc+free integration)
  MOD: Makefile (added C4 ULTRA object)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2025-12-11 19:38:27 +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/box/ptr_type_box.h \
core/hakmem_bigcache.h core/hakmem_pool.h \
core/box/hak_lane_classify.inc.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/superslab/../tiny_box_geometry.h \
core/superslab/../hakmem_tiny_superslab_constants.h \
core/superslab/../hakmem_tiny_config.h \
core/superslab/../hakmem_super_registry.h \
core/superslab/../hakmem_tiny_superslab.h \
core/superslab/../box/ss_addr_map_box.h \
core/superslab/../box/../hakmem_build_flags.h \
core/superslab/../box/super_reg_box.h core/tiny_debug_ring.h \
core/tiny_remote.h core/hakmem_tiny_superslab_constants.h \
core/tiny_fastcache.h core/hakmem_env_cache.h \
core/box/tiny_next_ptr_box.h core/hakmem_tiny_config.h \
core/tiny_nextptr.h core/tiny_region_id.h core/tiny_box_geometry.h \
core/ptr_track.h core/tiny_debug_api.h core/box/tiny_layout_box.h \
core/box/../hakmem_tiny_config.h core/box/tiny_header_box.h \
core/box/../hakmem_build_flags.h core/box/tiny_layout_box.h \
core/box/../tiny_region_id.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/hakmem_trace_master.h \
core/hakmem_stats_master.h core/box/hak_kpi_util.inc.h \
core/box/hak_core_init.inc.h core/hakmem_phase7_config.h \
core/box/libm_reloc_guard_box.h core/box/init_bench_preset_box.h \
core/box/init_diag_box.h core/box/init_env_box.h \
core/box/../tiny_destructors.h core/box/../hakmem_tiny.h \
core/box/ss_hot_prewarm_box.h core/box/hak_alloc_api.inc.h \
core/box/../hakmem_tiny.h core/box/../hakmem_pool.h \
core/box/../hakmem_smallmid.h core/box/tiny_heap_env_box.h \
core/box/c7_hotpath_env_box.h core/box/tiny_heap_box.h \
core/box/../hakmem_tiny_superslab.h \
core/box/../superslab/superslab_inline.h core/box/../tiny_tls.h \
core/box/../hakmem_tiny_superslab.h core/box/../tiny_box_geometry.h \
core/box/tiny_stats_box.h core/box/tiny_c7_hotbox.h \
core/box/mid_large_config_box.h core/box/../hakmem_config.h \
core/box/../hakmem_features.h core/box/hak_free_api.inc.h \
core/hakmem_tiny_superslab.h core/box/../hakmem_trace_master.h \
core/box/front_gate_v2.h core/box/external_guard_box.h \
core/box/../hakmem_stats_master.h core/box/ss_slab_meta_box.h \
core/box/../superslab/superslab_types.h core/box/slab_freelist_atomic.h \
core/box/fg_tiny_gate_box.h core/box/tiny_free_gate_box.h \
core/box/ptr_type_box.h core/box/ptr_conversion_box.h \
core/box/tiny_ptr_bridge_box.h \
core/box/../hakmem_tiny_superslab_internal.h \
core/box/../hakmem_build_flags.h core/box/../box/ss_hot_cold_box.h \
core/box/../box/../superslab/superslab_types.h \
core/box/../box/ss_allocation_box.h core/box/../hakmem_debug_master.h \
core/box/../hakmem_tiny_config.h core/box/../hakmem_shared_pool.h \
core/box/../superslab/superslab_types.h core/box/../hakmem_internal.h \
core/box/../tiny_region_id.h core/box/../hakmem_tiny_integrity.h \
core/box/../box/slab_freelist_atomic.h \
core/box/../tiny_free_fast_v2.inc.h core/box/../box/tls_sll_box.h \
core/box/../box/../hakmem_internal.h \
core/box/../box/../hakmem_tiny_config.h \
core/box/../box/../hakmem_build_flags.h \
core/box/../box/../hakmem_debug_master.h \
core/box/../box/../tiny_remote.h core/box/../box/../tiny_region_id.h \
core/box/../box/../hakmem_tiny_integrity.h \
core/box/../box/../ptr_track.h core/box/../box/../tiny_debug_ring.h \
core/box/../box/ss_addr_map_box.h \
core/box/../box/../superslab/superslab_inline.h \
core/box/../box/tiny_ptr_bridge_box.h core/box/../box/tiny_header_box.h \
core/box/../box/tls_sll_drain_box.h core/box/../box/tls_sll_box.h \
core/box/../box/slab_recycling_box.h \
core/box/../box/../hakmem_tiny_superslab.h \
core/box/../box/ss_hot_cold_box.h core/box/../box/ss_release_guard_box.h \
core/box/../box/../hakmem_tiny_superslab_internal.h \
core/box/../box/free_local_box.h core/box/../box/ptr_type_box.h \
core/box/../box/free_publish_box.h core/hakmem_tiny.h \
core/tiny_region_id.h core/box/../hakmem_env_cache.h \
core/box/../superslab/superslab_inline.h \
core/box/../box/ss_slab_meta_box.h core/box/../box/free_remote_box.h \
core/hakmem_tiny_integrity.h core/box/../box/ptr_conversion_box.h \
core/box/hak_wrappers.inc.h core/box/front_gate_classifier.h \
core/box/../front/malloc_tiny_fast.h \
core/box/../front/../hakmem_build_flags.h \
core/box/../front/../hakmem_tiny_config.h \
core/box/../front/../superslab/superslab_inline.h \
core/box/../front/../box/ss_slab_meta_box.h \
core/box/../front/tiny_unified_cache.h \
core/box/../front/../box/ptr_type_box.h \
core/box/../front/../box/tiny_front_config_box.h \
core/box/../front/../box/../hakmem_build_flags.h \
core/box/../front/../tiny_region_id.h core/box/../front/../hakmem_tiny.h \
core/box/../front/../box/tiny_front_hot_box.h \
core/box/../front/../box/../hakmem_tiny_config.h \
core/box/../front/../box/../tiny_region_id.h \
core/box/../front/../box/../front/tiny_unified_cache.h \
core/box/../front/../box/tiny_layout_box.h \
core/box/../front/../box/tiny_front_cold_box.h \
core/box/../front/../box/tiny_hotheap_v2_box.h \
core/box/../front/../box/smallobject_hotbox_v3_box.h \
core/box/../front/../box/tiny_geometry_box.h \
core/box/../front/../box/../hakmem_tiny_superslab_internal.h \
core/box/../front/../box/../superslab/superslab_inline.h \
core/box/../front/../box/smallobject_hotbox_v3_env_box.h \
core/box/../front/../box/smallobject_hotbox_v4_box.h \
core/box/../front/../box/smallobject_hotbox_v5_box.h \
core/box/../front/../box/tiny_c7_ultra_box.h \
core/box/../front/../box/tiny_c7_ultra_segment_box.h \
core/box/../front/../box/tiny_c6_ultra_free_box.h \
core/box/../front/../box/tiny_c6_ultra_free_env_box.h \
core/box/../front/../box/tiny_c5_ultra_free_box.h \
core/box/../front/../box/tiny_c5_ultra_free_env_box.h \
core/box/../front/../box/tiny_c4_ultra_free_box.h \
core/box/../front/../box/tiny_c4_ultra_free_env_box.h \
core/box/../front/../box/tiny_ultra_classes_box.h \
core/box/../front/../box/tiny_legacy_fallback_box.h \
core/box/../front/../box/tiny_front_v3_env_box.h \
core/box/../front/../box/free_path_stats_box.h \
core/box/../front/../box/tiny_front_hot_box.h \
core/box/../front/../box/tiny_ptr_convert_box.h \
core/box/../front/../box/tiny_route_env_box.h \
core/box/../front/../box/smallobject_hotbox_v4_env_box.h \
core/box/../front/../box/smallobject_v5_env_box.h \
core/box/../front/../box/tiny_front_stats_box.h \
core/box/../front/../box/free_path_stats_box.h \
core/box/tiny_alloc_gate_box.h core/box/tiny_route_box.h \
core/box/tiny_front_config_box.h core/box/wrapper_env_box.h \
core/box/../hakmem_internal.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/box/ptr_type_box.h:
core/hakmem_bigcache.h:
core/hakmem_pool.h:
core/box/hak_lane_classify.inc.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/superslab/../tiny_box_geometry.h:
core/superslab/../hakmem_tiny_superslab_constants.h:
core/superslab/../hakmem_tiny_config.h:
core/superslab/../hakmem_super_registry.h:
core/superslab/../hakmem_tiny_superslab.h:
core/superslab/../box/ss_addr_map_box.h:
core/superslab/../box/../hakmem_build_flags.h:
core/superslab/../box/super_reg_box.h:
core/tiny_debug_ring.h:
core/tiny_remote.h:
core/hakmem_tiny_superslab_constants.h:
core/tiny_fastcache.h:
core/hakmem_env_cache.h:
core/box/tiny_next_ptr_box.h:
core/hakmem_tiny_config.h:
core/tiny_nextptr.h:
core/tiny_region_id.h:
core/tiny_box_geometry.h:
core/ptr_track.h:
core/tiny_debug_api.h:
core/box/tiny_layout_box.h:
core/box/../hakmem_tiny_config.h:
core/box/tiny_header_box.h:
core/box/../hakmem_build_flags.h:
core/box/tiny_layout_box.h:
core/box/../tiny_region_id.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/hakmem_trace_master.h:
core/hakmem_stats_master.h:
core/box/hak_kpi_util.inc.h:
core/box/hak_core_init.inc.h:
core/hakmem_phase7_config.h:
core/box/libm_reloc_guard_box.h:
core/box/init_bench_preset_box.h:
core/box/init_diag_box.h:
core/box/init_env_box.h:
core/box/../tiny_destructors.h:
core/box/../hakmem_tiny.h:
core/box/ss_hot_prewarm_box.h:
core/box/hak_alloc_api.inc.h:
core/box/../hakmem_tiny.h:
core/box/../hakmem_pool.h:
core/box/../hakmem_smallmid.h:
core/box/tiny_heap_env_box.h:
core/box/c7_hotpath_env_box.h:
core/box/tiny_heap_box.h:
core/box/../hakmem_tiny_superslab.h:
core/box/../superslab/superslab_inline.h:
core/box/../tiny_tls.h:
core/box/../hakmem_tiny_superslab.h:
core/box/../tiny_box_geometry.h:
core/box/tiny_stats_box.h:
core/box/tiny_c7_hotbox.h:
core/box/mid_large_config_box.h:
core/box/../hakmem_config.h:
core/box/../hakmem_features.h:
core/box/hak_free_api.inc.h:
core/hakmem_tiny_superslab.h:
core/box/../hakmem_trace_master.h:
core/box/front_gate_v2.h:
core/box/external_guard_box.h:
core/box/../hakmem_stats_master.h:
core/box/ss_slab_meta_box.h:
core/box/../superslab/superslab_types.h:
core/box/slab_freelist_atomic.h:
core/box/fg_tiny_gate_box.h:
core/box/tiny_free_gate_box.h:
core/box/ptr_type_box.h:
core/box/ptr_conversion_box.h:
core/box/tiny_ptr_bridge_box.h:
core/box/../hakmem_tiny_superslab_internal.h:
core/box/../hakmem_build_flags.h:
core/box/../box/ss_hot_cold_box.h:
core/box/../box/../superslab/superslab_types.h:
core/box/../box/ss_allocation_box.h:
core/box/../hakmem_debug_master.h:
core/box/../hakmem_tiny_config.h:
core/box/../hakmem_shared_pool.h:
core/box/../superslab/superslab_types.h:
core/box/../hakmem_internal.h:
core/box/../tiny_region_id.h:
core/box/../hakmem_tiny_integrity.h:
core/box/../box/slab_freelist_atomic.h:
core/box/../tiny_free_fast_v2.inc.h:
core/box/../box/tls_sll_box.h:
core/box/../box/../hakmem_internal.h:
core/box/../box/../hakmem_tiny_config.h:
core/box/../box/../hakmem_build_flags.h:
core/box/../box/../hakmem_debug_master.h:
core/box/../box/../tiny_remote.h:
core/box/../box/../tiny_region_id.h:
core/box/../box/../hakmem_tiny_integrity.h:
core/box/../box/../ptr_track.h:
core/box/../box/../tiny_debug_ring.h:
core/box/../box/ss_addr_map_box.h:
core/box/../box/../superslab/superslab_inline.h:
core/box/../box/tiny_ptr_bridge_box.h:
core/box/../box/tiny_header_box.h:
core/box/../box/tls_sll_drain_box.h:
core/box/../box/tls_sll_box.h:
core/box/../box/slab_recycling_box.h:
core/box/../box/../hakmem_tiny_superslab.h:
core/box/../box/ss_hot_cold_box.h:
core/box/../box/ss_release_guard_box.h:
core/box/../box/../hakmem_tiny_superslab_internal.h:
core/box/../box/free_local_box.h:
core/box/../box/ptr_type_box.h:
core/box/../box/free_publish_box.h:
core/hakmem_tiny.h:
core/tiny_region_id.h:
core/box/../hakmem_env_cache.h:
core/box/../superslab/superslab_inline.h:
core/box/../box/ss_slab_meta_box.h:
core/box/../box/free_remote_box.h:
core/hakmem_tiny_integrity.h:
core/box/../box/ptr_conversion_box.h:
core/box/hak_wrappers.inc.h:
core/box/front_gate_classifier.h:
core/box/../front/malloc_tiny_fast.h:
core/box/../front/../hakmem_build_flags.h:
core/box/../front/../hakmem_tiny_config.h:
core/box/../front/../superslab/superslab_inline.h:
core/box/../front/../box/ss_slab_meta_box.h:
core/box/../front/tiny_unified_cache.h:
core/box/../front/../box/ptr_type_box.h:
core/box/../front/../box/tiny_front_config_box.h:
core/box/../front/../box/../hakmem_build_flags.h:
core/box/../front/../tiny_region_id.h:
core/box/../front/../hakmem_tiny.h:
core/box/../front/../box/tiny_front_hot_box.h:
core/box/../front/../box/../hakmem_tiny_config.h:
core/box/../front/../box/../tiny_region_id.h:
core/box/../front/../box/../front/tiny_unified_cache.h:
core/box/../front/../box/tiny_layout_box.h:
core/box/../front/../box/tiny_front_cold_box.h:
core/box/../front/../box/tiny_hotheap_v2_box.h:
core/box/../front/../box/smallobject_hotbox_v3_box.h:
core/box/../front/../box/tiny_geometry_box.h:
core/box/../front/../box/../hakmem_tiny_superslab_internal.h:
core/box/../front/../box/../superslab/superslab_inline.h:
core/box/../front/../box/smallobject_hotbox_v3_env_box.h:
core/box/../front/../box/smallobject_hotbox_v4_box.h:
core/box/../front/../box/smallobject_hotbox_v5_box.h:
core/box/../front/../box/tiny_c7_ultra_box.h:
core/box/../front/../box/tiny_c7_ultra_segment_box.h:
core/box/../front/../box/tiny_c6_ultra_free_box.h:
core/box/../front/../box/tiny_c6_ultra_free_env_box.h:
core/box/../front/../box/tiny_c5_ultra_free_box.h:
core/box/../front/../box/tiny_c5_ultra_free_env_box.h:
core/box/../front/../box/tiny_c4_ultra_free_box.h:
core/box/../front/../box/tiny_c4_ultra_free_env_box.h:
core/box/../front/../box/tiny_ultra_classes_box.h:
core/box/../front/../box/tiny_legacy_fallback_box.h:
core/box/../front/../box/tiny_front_v3_env_box.h:
core/box/../front/../box/free_path_stats_box.h:
core/box/../front/../box/tiny_front_hot_box.h:
core/box/../front/../box/tiny_ptr_convert_box.h:
core/box/../front/../box/tiny_route_env_box.h:
core/box/../front/../box/smallobject_hotbox_v4_env_box.h:
core/box/../front/../box/smallobject_v5_env_box.h:
core/box/../front/../box/tiny_front_stats_box.h:
core/box/../front/../box/free_path_stats_box.h:
core/box/tiny_alloc_gate_box.h:
core/box/tiny_route_box.h:
core/box/tiny_front_config_box.h:
core/box/wrapper_env_box.h:
core/box/../hakmem_internal.h:
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