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Phase 3d-B: TLS Cache Merge - Unified g_tls_sll[] structure (+12-18% expected)

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Merge separate g_tls_sll_head[] and g_tls_sll_count[] arrays into unified
TinyTLSSLL struct to improve L1D cache locality. Expected performance gain:
+12-18% from reducing cache line splits (2 loads → 1 load per operation).

Changes:
- core/hakmem_tiny.h: Add TinyTLSSLL type (16B aligned, head+count+pad)
- core/hakmem_tiny.c: Replace separate arrays with g_tls_sll[8]
- core/box/tls_sll_box.h: Update Box API (13 sites) for unified access
- Updated 32+ files: All g_tls_sll_head[i] → g_tls_sll[i].head
- Updated 32+ files: All g_tls_sll_count[i] → g_tls_sll[i].count
- core/hakmem_tiny_integrity.h: Unified canary guards
- core/box/integrity_box.c: Simplified canary validation
- Makefile: Added core/box/tiny_sizeclass_hist_box.o to link

Build: ✅ PASS (10K ops sanity test)
Warnings: Only pre-existing LTO type mismatches (unrelated)

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

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Moe Charm (CI)
2025-11-20 07:32:30 +09:00
parent 38552c3f39
commit 9b0d746407
83 changed files with 7509 additions and 259 deletions
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20
core/hakmem_tiny.c
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@ -1165,25 +1165,15 @@ static __attribute__((cold, noinline, unused)) void* tiny_slow_alloc_fast(int cl
// Hot-path cheap sampling counter to avoid rand() in allocation path
// Phase 9.4: TLS single-linked freelist (mimalloc-inspired) for hottest classes (≤128B/≤256B)
int g_tls_sll_enable = 1; // HAKMEM_TINY_TLS_SLL=0 to disable
int g_tiny_hotpath_class5 = 0; // HAKMEM_TINY_HOTPATH_CLASS5=1 to enable class 5 hotpath
// Phase 6-1.7: Export TLS variables for box refactor (Box 5/6 need access from hakmem.c)
// CRITICAL FIX: Explicit initializers prevent SEGV from uninitialized TLS in worker threads
// PRIORITY 3: TLS Canaries - Add canaries around TLS arrays to detect buffer overruns
#define TLS_CANARY_MAGIC 0xDEADBEEFDEADBEEFULL
__thread uint64_t g_tls_canary_before_sll_head = TLS_CANARY_MAGIC;
#ifdef HAKMEM_TINY_PHASE6_BOX_REFACTOR
__thread void* g_tls_sll_head[TINY_NUM_CLASSES] __attribute__((aligned(64))) = {0};
#else
static __thread void* g_tls_sll_head[TINY_NUM_CLASSES] __attribute__((aligned(64))) = {0};
#endif
__thread uint64_t g_tls_canary_after_sll_head = TLS_CANARY_MAGIC;
__thread uint64_t g_tls_canary_before_sll_count = TLS_CANARY_MAGIC;
#ifdef HAKMEM_TINY_PHASE6_BOX_REFACTOR
__thread uint32_t g_tls_sll_count[TINY_NUM_CLASSES] __attribute__((aligned(64))) = {0};
#else
static __thread uint32_t g_tls_sll_count[TINY_NUM_CLASSES] __attribute__((aligned(64))) = {0};
#endif
__thread uint64_t g_tls_canary_after_sll_count = TLS_CANARY_MAGIC;
// Phase 3d-B: Unified TLS SLL (head+count in same cache line for +12-18% cache hit rate)
__thread uint64_t g_tls_canary_before_sll = TLS_CANARY_MAGIC;
__thread TinyTLSSLL g_tls_sll[TINY_NUM_CLASSES] __attribute__((aligned(64))) = {0};
__thread uint64_t g_tls_canary_after_sll = TLS_CANARY_MAGIC;
static int g_tiny_ultra = 0; // HAKMEM_TINY_ULTRA=1 for SLL-only ultra mode
static int g_ultra_validate = 0; // HAKMEM_TINY_ULTRA_VALIDATE=1 to enable per-pop validation
// Ultra debug counters