39a3c53dbc
- SmallSegment_v7: 2MiB segment with TLS slot and free page stack - ColdIface_v7: Page refill/retire between HotBox and SegmentBox - HotBox_v7: Full C6-only alloc/free with header writing (HEADER_MAGIC|class_idx) - Free path early-exit: Check v7 route BEFORE ss_fast_lookup (separate mmap segment) - RegionIdBox: Register v7 segment for ptr->region lookup - Benchmark: v7 ON ~54.5M ops/s (-7% overhead vs 58.6M legacy baseline) v7 correctly balances alloc/free counts and page lifecycle. RegionIdBox overhead identified as primary cost driver. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
#ifndef HAKMEM_FREE_PATH_STATS_BOX_H
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#define HAKMEM_FREE_PATH_STATS_BOX_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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typedef struct FreePathStats {
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uint64_t total_calls;
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uint64_t c7_ultra_fast;
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uint64_t c6_ultra_free_fast; // Phase 4-2: C6 ULTRA-free
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uint64_t c6_ultra_alloc_hit; // Phase 4-4: C6 ULTRA-alloc (TLS pop)
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uint64_t c5_ultra_free_fast; // Phase 5-1: C5 ULTRA-free
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uint64_t c5_ultra_alloc_hit; // Phase 5-2: C5 ULTRA-alloc (TLS pop)
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uint64_t c4_ultra_free_fast; // Phase 6: C4 ULTRA-free (cap=64)
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uint64_t c4_ultra_alloc_hit; // Phase 6: C4 ULTRA-alloc (TLS pop)
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uint64_t smallheap_v3_fast;
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uint64_t smallheap_v6_fast;
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uint64_t smallheap_v7_fast; // Phase v7-2: SmallHeap v7 fast free
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uint64_t tiny_heap_v1_fast;
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uint64_t pool_v1_fast;
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uint64_t remote_free;
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uint64_t super_lookup_called;
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uint64_t legacy_fallback;
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// Phase 4-1: Legacy per-class breakdown
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uint64_t legacy_by_class[8]; // C0-C7 の Legacy fallback 内訳
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} FreePathStats;
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// ENV gate
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static inline bool free_path_stats_enabled(void) {
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static int g_enabled = -1;
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if (__builtin_expect(g_enabled == -1, 0)) {
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const char* e = getenv("HAKMEM_FREE_PATH_STATS");
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g_enabled = (e && *e && *e != '0') ? 1 : 0;
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}
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return g_enabled;
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}
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// Global stats instance
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extern FreePathStats g_free_path_stats;
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// Increment macros (with unlikely guard)
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#define FREE_PATH_STAT_INC(field) \
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do { if (__builtin_expect(free_path_stats_enabled(), 0)) { \
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g_free_path_stats.field++; \
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} } while(0)
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#endif // HAKMEM_FREE_PATH_STATS_BOX_H
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