hakmem

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Author	SHA1	Message	Date
Moe Charm (CI)	a78224123e	Fix C0/C7 class confusion: Upgrade C7 stride to 2048B and fix meta->class_idx initialization Root Cause: 1. C7 stride was 1024B, unable to serve 1024B user requests (need 1025B with header) 2. New SuperSlabs start with meta->class_idx=0 (mmap zero-init) 3. superslab_init_slab() only sets class_idx if meta->class_idx==255 4. Multiple code paths used conditional assignment (if class_idx==255), leaving C7 slabs with class_idx=0 5. This caused C7 blocks to be misidentified as C0, leading to HDR_META_MISMATCH errors Changes: 1. Upgrade C7 stride: 1024B → 2048B (can now serve 1024B requests) 2. Update blocks_per_slab[7]: 64 → 32 (2048B stride / 64KB slab) 3. Update size-to-class LUT: entries 513-2048 now map to C7 4. Fix superslab_init_slab() fail-safe: only reinitialize if class_idx==255 (not 0) 5. Add explicit class_idx assignment in 6 initialization paths: - tiny_superslab_alloc.inc.h: superslab_refill() after init - hakmem_tiny_superslab.c: backend_shared after init (main path) - ss_unified_backend_box.c: unconditional assignment - ss_legacy_backend_box.c: explicit assignment - superslab_expansion_box.c: explicit assignment - ss_allocation_box.c: fail-safe condition fix Fix P0 refill bug: - Update obsolete array access after Phase 3d-B TLS SLL unification - g_tls_sll_head[cls] → g_tls_sll[cls].head - g_tls_sll_count[cls] → g_tls_sll[cls].count Results: - HDR_META_MISMATCH: eliminated (0 errors in 100K iterations) - 1024B allocations now routed to C7 (Tiny fast path) - NXT_MISALIGN warnings remain (legacy 1024B SuperSlabs, separate issue) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>	2025-11-21 13:44:05 +09:00
Moe Charm (CI)	9b0d746407	Phase 3d-B: TLS Cache Merge - Unified g_tls_sll[] structure (+12-18% expected) 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>	2025-11-20 07:32:30 +09:00

Author

SHA1

Message

Date

Moe Charm (CI)

a78224123e

Fix C0/C7 class confusion: Upgrade C7 stride to 2048B and fix meta->class_idx initialization

Root Cause:
1. C7 stride was 1024B, unable to serve 1024B user requests (need 1025B with header)
2. New SuperSlabs start with meta->class_idx=0 (mmap zero-init)
3. superslab_init_slab() only sets class_idx if meta->class_idx==255
4. Multiple code paths used conditional assignment (if class_idx==255), leaving C7 slabs with class_idx=0
5. This caused C7 blocks to be misidentified as C0, leading to HDR_META_MISMATCH errors

Changes:
1. Upgrade C7 stride: 1024B → 2048B (can now serve 1024B requests)
2. Update blocks_per_slab[7]: 64 → 32 (2048B stride / 64KB slab)
3. Update size-to-class LUT: entries 513-2048 now map to C7
4. Fix superslab_init_slab() fail-safe: only reinitialize if class_idx==255 (not 0)
5. Add explicit class_idx assignment in 6 initialization paths:
   - tiny_superslab_alloc.inc.h: superslab_refill() after init
   - hakmem_tiny_superslab.c: backend_shared after init (main path)
   - ss_unified_backend_box.c: unconditional assignment
   - ss_legacy_backend_box.c: explicit assignment
   - superslab_expansion_box.c: explicit assignment
   - ss_allocation_box.c: fail-safe condition fix

Fix P0 refill bug:
- Update obsolete array access after Phase 3d-B TLS SLL unification
- g_tls_sll_head[cls] → g_tls_sll[cls].head
- g_tls_sll_count[cls] → g_tls_sll[cls].count

Results:
- HDR_META_MISMATCH: eliminated (0 errors in 100K iterations)
- 1024B allocations now routed to C7 (Tiny fast path)
- NXT_MISALIGN warnings remain (legacy 1024B SuperSlabs, separate issue)

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

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-21 13:44:05 +09:00

Moe Charm (CI)

9b0d746407

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

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>

2025-11-20 07:32:30 +09:00

2 Commits