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>
72 lines
2.1 KiB
Bash
72 lines
2.1 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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# Redis-style allocator benchmark triad (System/mimalloc/HAKMEM via LD_PRELOAD)
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# Usage: benchmarks/scripts/run_redis_matrix.sh [threads] [cycles] [ops] [reps]
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ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")"/../.. && pwd)"
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cd "$ROOT_DIR"
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THREADS=${1:-1}
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CYCLES=${2:-100}
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OPS=${3:-1000}
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REPS=${4:-5}
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BENCH="./benchmarks/redis/workload_bench_system"
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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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if [[ ! -x "$BENCH" ]]; then
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echo "[error] $BENCH not found or not executable" >&2
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exit 1
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fi
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if [[ ! -f "$MI_LIB" ]]; then
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echo "[warn] mimalloc .so not found at $MI_LIB (set MIMALLOC_SO) — skipping mi runs" >&2
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HAVE_MI=0
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else
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HAVE_MI=1
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fi
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# Ensure shared lib exists for HAKMEM LD_PRELOAD
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[[ -f ./libhakmem.so ]] || make -s shared >/dev/null || true
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TS=$(date +%Y%m%d_%H%M%S)
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OUTDIR="bench_results/auto/redis_${TS}"
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mkdir -p "$OUTDIR"
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CSV="$OUTDIR/results.csv"
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echo "ts,scenario,allocator,env,threads,cycles,ops,rep,throughput_ops_s" >"$CSV"
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extract_ops_s() {
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# workload_bench prints: "Throughput: 28.97 M ops/sec"
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# return ops/s as integer
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awk '/Throughput:/ {print int($2*1000000)}' | tail -n1
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}
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run_case() {
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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 "$BENCH" -t "$THREADS" -c "$CYCLES" -o "$OPS" 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,redis,$alloc,$(echo "$envstr" | sed 's/,/;/g'),$THREADS,$CYCLES,$OPS,$rep,$tput" >>"$CSV"
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fi
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}
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echo "[info] writing CSV to $CSV"
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# System
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for ((i=1;i<=REPS;i++)); do run_case system "env -i" "$i"; done
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# mimalloc
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if (( HAVE_MI == 1 )); then
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for ((i=1;i<=REPS;i++)); do run_case mimalloc "env -i LD_PRELOAD=$MI_LIB" "$i"; done
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fi
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# HAKMEM (safer LD flags for tiny-only)
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for ((i=1;i<=REPS;i++)); do \
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run_case hakmem "env -i LD_PRELOAD=./libhakmem.so HAKMEM_WRAP_TINY=1 HAKMEM_LD_SAFE=1 HAKMEM_TINY_SUPERSLAB=0 HAKMEM_TINY_TRACE_RING=0 HAKMEM_SAFE_FREE=0" "$i"; done
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echo "[done] $CSV"
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