1da8754d45
**問題:**
- Larson 4T で 100% SEGV (1T は 2.09M ops/s で完走)
- System/mimalloc は 4T で 33.52M ops/s 正常動作
- SS OFF + Remote OFF でも 4T で SEGV
**根本原因: (Task agent ultrathink 調査結果)**
```
CRASH: mov (%r15),%r13
R15 = 0x6261 ← ASCII "ba" (ゴミ値、未初期化TLS)
```
Worker スレッドの TLS 変数が未初期化:
- `__thread void* g_tls_sll_head[TINY_NUM_CLASSES];` ← 初期化なし
- pthread_create() で生成されたスレッドでゼロ初期化されない
- NULL チェックが通過 (0x6261 != NULL) → dereference → SEGV
**修正内容:**
全 TLS 配列に明示的初期化子 `= {0}` を追加:
1. **core/hakmem_tiny.c:**
- `g_tls_sll_head[TINY_NUM_CLASSES] = {0}`
- `g_tls_sll_count[TINY_NUM_CLASSES] = {0}`
- `g_tls_live_ss[TINY_NUM_CLASSES] = {0}`
- `g_tls_bcur[TINY_NUM_CLASSES] = {0}`
- `g_tls_bend[TINY_NUM_CLASSES] = {0}`
2. **core/tiny_fastcache.c:**
- `g_tiny_fast_cache[TINY_FAST_CLASS_COUNT] = {0}`
- `g_tiny_fast_count[TINY_FAST_CLASS_COUNT] = {0}`
- `g_tiny_fast_free_head[TINY_FAST_CLASS_COUNT] = {0}`
- `g_tiny_fast_free_count[TINY_FAST_CLASS_COUNT] = {0}`
3. **core/hakmem_tiny_magazine.c:**
- `g_tls_mags[TINY_NUM_CLASSES] = {0}`
4. **core/tiny_sticky.c:**
- `g_tls_sticky_ss[TINY_NUM_CLASSES][TINY_STICKY_RING] = {0}`
- `g_tls_sticky_idx[TINY_NUM_CLASSES][TINY_STICKY_RING] = {0}`
- `g_tls_sticky_pos[TINY_NUM_CLASSES] = {0}`
**効果:**
```
Before: 1T: 2.09M ✅ | 4T: SEGV 💀
After: 1T: 2.41M ✅ | 4T: 4.19M ✅ (+15% 1T, SEGV解消)
```
**テスト:**
```bash
# 1 thread: 完走
./larson_hakmem 2 8 128 1024 1 12345 1
→ Throughput = 2,407,597 ops/s ✅
# 4 threads: 完走（以前は SEGV）
./larson_hakmem 2 8 128 1024 1 12345 4
→ Throughput = 4,192,155 ops/s ✅
```
**調査協力:** Task agent (ultrathink mode) による完璧な根本原因特定
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
50 lines
1.5 KiB
Bash
Executable File
50 lines
1.5 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
set -euo pipefail
|
|
|
|
# run_larson_dev.sh — deterministic run wrapper (avoids perf warm-up issues)
|
|
#
|
|
# Usage:
|
|
# scripts/run_larson_dev.sh tput 10 4
|
|
# scripts/run_larson_dev.sh pf 10 4
|
|
#
|
|
# Notes:
|
|
# - Runs ./larson_hakmem directly and prints the Throughput line.
|
|
# - Keeps logging quiet and avoids perf warm-ups that sometimes SEGV under A/B.
|
|
|
|
MODE=${1:-tput}
|
|
DUR=${2:-10}
|
|
THR=${3:-4}
|
|
|
|
ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")"/.. && pwd)"
|
|
cd "$ROOT_DIR"
|
|
|
|
[[ -x ./larson_hakmem ]] || ./scripts/build_larson_dev.sh
|
|
|
|
export HAKMEM_QUIET=1
|
|
export HAKMEM_TINY_SUKESUKE=0
|
|
export HAKMEM_TINY_TRACE_RING=0
|
|
export HAKMEM_DISABLE_BATCH=1
|
|
export HAKMEM_WRAP_TINY=1
|
|
export HAKMEM_LARSON_TINY_ONLY=1
|
|
export HAKMEM_TINY_META_ALLOC=1
|
|
export HAKMEM_TINY_META_FREE=1
|
|
export HAKMEM_TINY_USE_SUPERSLAB=1
|
|
|
|
if [[ "$MODE" == "tput" ]]; then
|
|
export HAKMEM_TINY_FREE_TO_SS=0
|
|
export HAKMEM_TINY_MUST_ADOPT=0
|
|
export HAKMEM_TINY_REG_SCAN_MAX=${HAKMEM_TINY_REG_SCAN_MAX:-64}
|
|
export HAKMEM_SFC_ENABLE=${HAKMEM_SFC_ENABLE:-1}
|
|
export HAKMEM_TINY_TLS_LIST=${HAKMEM_TINY_TLS_LIST:-1}
|
|
export HAKMEM_TINY_TLS_SLL=${HAKMEM_TINY_TLS_SLL:-1}
|
|
else
|
|
export HAKMEM_TINY_FREE_TO_SS=1
|
|
export HAKMEM_TINY_MUST_ADOPT=1
|
|
export HAKMEM_TINY_SS_ADOPT_COOLDOWN=${HAKMEM_TINY_SS_ADOPT_COOLDOWN:-64}
|
|
export HAKMEM_TINY_REG_SCAN_MAX=${HAKMEM_TINY_REG_SCAN_MAX:-32}
|
|
fi
|
|
|
|
echo "[run_dev] mode=$MODE dur=$DUR thr=$THR"
|
|
./larson_hakmem "$DUR" 8 128 1024 1 12345 "$THR" | rg "Throughput" -n || true
|
|
|