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>
69 lines
2.0 KiB
Bash
69 lines
2.0 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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# Larson triad (system/mimalloc/HAKMEM), CSV保存
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# Usage: benchmarks/scripts/run_larson_matrix.sh [dur_csv] [threads_csv] [reps]
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# dur_csv default: 2,10 threads_csv default: 1,4 reps default: 5
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ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")"/../.. && pwd)"
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cd "$ROOT_DIR"
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dur_csv=${1:-"2,10"}
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thr_csv=${2:-"1,4"}
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reps=${3:-5}
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MIN=8; MAX=128; CHUNKS=1024; ROUNDS=1; SEED=12345
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MI_LIB_DEFAULT="mimalloc-bench/extern/mi/out/release/libmimalloc.so"
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MI_LIB="${MIMALLOC_SO:-$MI_LIB_DEFAULT}"
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[[ -x ./larson_system ]] || make -s larson_system >/dev/null
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if [[ -f "$MI_LIB" ]]; then
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[[ -x ./larson_mi ]] || make -s larson_mi >/dev/null
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HAVE_MI=1
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else
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HAVE_MI=0
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fi
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[[ -x ./larson_hakmem ]] || make -s larson_hakmem >/dev/null
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TS=$(date +%Y%m%d_%H%M%S)
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OUTDIR="bench_results/auto/larson_${TS}"
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mkdir -p "$OUTDIR"
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CSV="$OUTDIR/results.csv"
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echo "ts,scenario,dur_s,threads,allocator,env,rep,throughput_ops_s" >"$CSV"
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IFS=',' read -ra DLIST <<<"$dur_csv"
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IFS=',' read -ra TLIST <<<"$thr_csv"
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extract_ops_s() {
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awk '/Throughput =/{print $3}' | tail -n1
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}
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run_case() {
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local dur="$1"; shift
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local thr="$1"; shift
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local alloc="$1"; shift
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local envstr="$1"; shift
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local rep="$2"; shift
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local ts=$(date +%H%M%S)
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local out
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out=$($envstr ./larson_${alloc} "$dur" "$MIN" "$MAX" "$CHUNKS" "$ROUNDS" "$SEED" "$thr" 2>/dev/null || true)
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local tput=$(echo "$out" | extract_ops_s)
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if [[ -n "${tput:-}" ]]; then
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echo "$ts,larson,$dur,$thr,$alloc,$(echo "$envstr" | sed 's/,/;/g'),$rep,$tput" >>"$CSV"
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fi
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}
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echo "[info] writing CSV to $CSV"
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for d in "${DLIST[@]}"; do
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for t in "${TLIST[@]}"; do
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for ((i=1;i<=reps;i++)); do run_case "$d" "$t" system "env -i" "$i"; done
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if (( HAVE_MI == 1 )); then
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for ((i=1;i<=reps;i++)); do run_case "$d" "$t" mi "env -i LD_LIBRARY_PATH=$(dirname "$MI_LIB")" "$i"; done
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fi
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for ((i=1;i<=reps;i++)); do run_case "$d" "$t" hakmem "env -i HAKMEM_WRAP_TINY=1" "$i"; done
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done
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done
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echo "[done] $CSV"
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