e95e61f0ff
## Phase POLICY-FAST-PATH-V2 (FROZEN) - Implementation complete: free_policy_fast_v2_box.h + malloc_tiny_fast.h integration - A/B Results: - Mixed (ws=400): -1.6% regression ❌ (branch cost > skip benefit) - C6-heavy (ws=200): +5.4% improvement ✅ - Decision: Default OFF, FROZEN (ws<300 / C6-heavy research only) - Learning: Large WS causes branch misprediction to dominate ## Phase 3-GRADUATE + ENV probe fix - 64-probe retry for getenv() stability during bench_profile putenv() - C6 ULTRA intrusive freelist: FROZEN (research box) ## Phase MID-V35-HOTPATH-OPT-1-DESIGN - Design doc for next optimization target - Target: MID v3.5 alloc/free hot path (C5-C6) - Boxes: Stats Gate, TLS Layout, Boundary Check elimination - Expected: +3-9% on Mixed mainline Files: - core/box/free_policy_fast_v2_box.h (new) - core/box/free_path_stats_box.h/c (policy_fast_v2_skip counter) - core/front/malloc_tiny_fast.h (fast-path integration) - docs/analysis/MID_V35_HOTPATH_OPT_1_DESIGN.md (new) - docs/analysis/PHASE_3_GRADUATE_*.md (new) - CURRENT_TASK.md (phase status update) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
59 lines
2.5 KiB
C
59 lines
2.5 KiB
C
#include "free_path_stats_box.h"
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#include <stdio.h>
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FreePathStats g_free_path_stats = {0};
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// Helper function for pool_api.inc.h (to avoid inline include issues)
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void free_path_stat_inc_pool_v1_fast(void) {
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if (__builtin_expect(free_path_stats_enabled(), 0)) {
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g_free_path_stats.pool_v1_fast++;
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}
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}
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__attribute__((destructor))
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static void free_path_stats_dump(void) {
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if (!free_path_stats_enabled()) {
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return;
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}
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fprintf(stderr, "[FREE_PATH_STATS] total=%lu c7_ultra=%lu c6_ultra_free=%lu c6_ultra_alloc=%lu c5_ultra_free=%lu c5_ultra_alloc=%lu c4_ultra_free=%lu c4_ultra_alloc=%lu small_v3=%lu v6=%lu tiny_v1=%lu pool_v1=%lu remote=%lu super_lookup=%lu legacy_fb=%lu\n",
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g_free_path_stats.total_calls,
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g_free_path_stats.c7_ultra_fast,
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g_free_path_stats.c6_ultra_free_fast, // Phase 4-2
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g_free_path_stats.c6_ultra_alloc_hit, // Phase 4-4
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g_free_path_stats.c5_ultra_free_fast, // Phase 5-1
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g_free_path_stats.c5_ultra_alloc_hit, // Phase 5-2
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g_free_path_stats.c4_ultra_free_fast, // Phase 6
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g_free_path_stats.c4_ultra_alloc_hit, // Phase 6
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g_free_path_stats.smallheap_v3_fast,
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g_free_path_stats.smallheap_v6_fast,
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g_free_path_stats.tiny_heap_v1_fast,
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g_free_path_stats.pool_v1_fast,
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g_free_path_stats.remote_free,
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g_free_path_stats.super_lookup_called,
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g_free_path_stats.legacy_fallback);
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// Phase 4-1: Legacy per-class breakdown
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fprintf(stderr, "[FREE_PATH_STATS_LEGACY_BY_CLASS] c0=%lu c1=%lu c2=%lu c3=%lu c4=%lu c5=%lu c6=%lu c7=%lu\n",
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g_free_path_stats.legacy_by_class[0],
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g_free_path_stats.legacy_by_class[1],
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g_free_path_stats.legacy_by_class[2],
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g_free_path_stats.legacy_by_class[3],
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g_free_path_stats.legacy_by_class[4],
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g_free_path_stats.legacy_by_class[5],
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g_free_path_stats.legacy_by_class[6],
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g_free_path_stats.legacy_by_class[7]);
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// Phase TLS-UNIFY-3: C6 Intrusive Freelist stats
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fprintf(stderr, "[FREE_PATH_STATS_C6_IFL] push=%lu pop=%lu fallback=%lu\n",
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g_free_path_stats.c6_ifl_push,
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g_free_path_stats.c6_ifl_pop,
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g_free_path_stats.c6_ifl_fallback);
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// Phase POLICY-FAST-PATH-V2: Fast-path policy skip
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fprintf(stderr, "[FREE_PATH_STATS_POLICY_FASTV2] skip=%lu\n",
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g_free_path_stats.policy_fast_v2_skip);
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fflush(stderr);
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}
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