tomoaki/hakmem
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Phase v7-2: SmallObject v7 C6-only implementation with RegionIdBox integration

Browse Source 
- 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>
This commit is contained in:
Moe Charm (CI)
2025-12-12 03:12:28 +09:00
parent a8d0ab06fc
commit 39a3c53dbc
17 changed files with 1729 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
core/front/malloc_tiny_fast.h
View File

@ -45,6 +45,7 @@
#include "../box/smallobject_hotbox_v5_box.h" // SmallObject HotHeap v5 (C6-only route stub, Phase v5-1)
#include "../box/smallobject_core_v6_box.h" // SmallObject Core v6 (Phase V6-HDR-2)
#include "../box/smallobject_v6_env_box.h" // SmallObject v6 ENV control (Phase V6-HDR-2)
#include "../box/smallobject_hotbox_v7_box.h" // SmallObject HotBox v7 stub (Phase v7-1)
#include "../box/tiny_c7_ultra_box.h" // C7 ULTRA stub (UF-1, delegates to v3)
#include "../box/tiny_c6_ultra_free_box.h" // Phase 4-2: C6 ULTRA-free (free-only, C6-only)
#include "../box/tiny_c5_ultra_free_box.h" // Phase 5-1/5-2: C5 ULTRA-free + alloc integration
@ -161,7 +162,7 @@ static inline void* malloc_tiny_fast(size_t size) {
route != TINY_ROUTE_LEGACY && route != TINY_ROUTE_HEAP &&
route != TINY_ROUTE_HOTHEAP_V2 && route != TINY_ROUTE_SMALL_HEAP_V3 &&
route != TINY_ROUTE_SMALL_HEAP_V4 && route != TINY_ROUTE_SMALL_HEAP_V5 &&
route != TINY_ROUTE_SMALL_HEAP_V6) {
route != TINY_ROUTE_SMALL_HEAP_V6 && route != TINY_ROUTE_SMALL_HEAP_V7) {
// Phase ALLOC-GATE-OPT-1: カウンタ散布 (3. route_for_class 呼び出し)
ALLOC_GATE_STAT_INC(route_for_class_calls);
route = tiny_route_for_class((uint8_t)class_idx);
@ -223,6 +224,15 @@ static inline void* malloc_tiny_fast(size_t size) {
}
switch (route) {
case TINY_ROUTE_SMALL_HEAP_V7: {
// Phase v7-1: C6-only v7 stub (MID v3 fallback)
void* v7p = small_heap_alloc_fast_v7_stub(size, (uint8_t)class_idx);
if (TINY_HOT_LIKELY(v7p != NULL)) {
return v7p;
}
// v7 stub returned NULL -> fallback to legacy
break;
}
case TINY_ROUTE_SMALL_HEAP_V6: {
// Phase V6-HDR-2: Headerless alloc (ENV gated)
if (small_v6_headerless_route_enabled((uint8_t)class_idx)) {
@ -386,6 +396,16 @@ static inline int free_tiny_fast(void* ptr) {
tiny_route_kind_t route = tiny_route_for_class((uint8_t)class_idx);
// Phase v7-2: v7 early-exit for C6 (v7 uses separate mmap segment, not SuperSlab)
// Must check BEFORE ss_fast_lookup since v7 pointers won't be in SuperSlab registry
if (class_idx == 6 && route == TINY_ROUTE_SMALL_HEAP_V7) {
if (small_heap_free_fast_v7_stub(ptr, (uint8_t)class_idx)) {
FREE_PATH_STAT_INC(smallheap_v7_fast);
return 1;
}
// v7 returned false (ptr not in v7 segment) -> fallback to legacy below
}
if ((class_idx == 7 || class_idx == 6) &&
route == TINY_ROUTE_SMALL_HEAP_V4 &&
tiny_ptr_fast_classify_v4_enabled() &&
@ -464,6 +484,13 @@ static inline int free_tiny_fast(void* ptr) {
// Same-thread + TinyHeap route → route-based free
if (__builtin_expect(use_tiny_heap, 0)) {
switch (route) {
case TINY_ROUTE_SMALL_HEAP_V7: {
// Phase v7-1: C6-only v7 stub (MID v3 fallback)
if (small_heap_free_fast_v7_stub(ptr, (uint8_t)class_idx)) {
return 1;
}
break; // fallthrough to legacy
}
case TINY_ROUTE_SMALL_HEAP_V6: {
// Phase V6-HDR-2: Headerless free (ENV gated)
if (small_v6_headerless_route_enabled((uint8_t)class_idx)) {