2a13478dc7
- Update environment profile presets and visibility analysis - Enhance small object and tiny segment v4 box implementations - Refine C7 ultra and C6 heavy allocation strategies - Add comprehensive performance metrics and design documentation 🤖 Generated with Claude Code Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
96 lines
4.4 KiB
Markdown
96 lines
4.4 KiB
Markdown
# PF/OS ベースライン
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# BASELINE-LOCK (Mixed 16–1024B v3 vs v4, Release)
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- コマンド共通 (ws=400, iters=1M):
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```
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HAKMEM_PROFILE=MIXED_TINYV3_C7_SAFE
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HAKMEM_BENCH_MIN_SIZE=16
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HAKMEM_BENCH_MAX_SIZE=1024
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```
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- v3 本命構成（C7-only v3, v4/segment すべて OFF, fast classify v3 ON）:
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- `HAKMEM_SMALL_HEAP_V3_ENABLED=1 HAKMEM_SMALL_HEAP_V3_CLASSES=0x80 HAKMEM_SMALL_HEAP_V4_ENABLED=0 HAKMEM_SMALL_HEAP_V4_CLASSES=0 HAKMEM_TINY_PTR_FAST_CLASSIFY_V4_ENABLED=0 HAKMEM_SMALL_SEGMENT_V4_ENABLED=0`
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- Throughput: **33.7–33.9M ops/s**（2 run, segv/assert なし）
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- v4 強制（C7+C6 v4 + fast classify v4, v3 OFF, segment OFF）:
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- `HAKMEM_SMALL_HEAP_V3_ENABLED=0 HAKMEM_SMALL_HEAP_V3_CLASSES=0 HAKMEM_SMALL_HEAP_V4_ENABLED=1 HAKMEM_SMALL_HEAP_V4_CLASSES=0xC0 HAKMEM_TINY_PTR_FAST_CLASSIFY_V4_ENABLED=1`
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- Throughput: **32.0–32.5M ops/s**
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- C7-only v4（C6 v1, v3 OFF, fast classify v4 ON）:
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- `HAKMEM_SMALL_HEAP_V4_CLASSES=0x80 HAKMEM_SMALL_HEAP_V3_ENABLED=0`
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- Throughput: **≈33.0M ops/s**
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- 判断: 現行 Mixed の本命は v3 構成（上記）。v4 系は研究箱として opt-in 扱いを維持。
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# PF/OS ベースライン (PF2, small-object v4 状態)
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- コマンド (Release, v4: C7+C6 を v4 に強制、v3 OFF):
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```
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HAKMEM_PROFILE=MIXED_TINYV3_C7_SAFE \
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HAKMEM_BENCH_MIN_SIZE=16 \
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HAKMEM_BENCH_MAX_SIZE=1024 \
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HAKMEM_SS_OS_STATS=1 \
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HAKMEM_SMALL_HEAP_V4_ENABLED=1 \
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HAKMEM_SMALL_HEAP_V4_CLASSES=0xC0 \
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HAKMEM_SMALL_HEAP_V3_ENABLED=0 \
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perf stat -e cycles,instructions,task-clock,page-faults \
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./bench_random_mixed_hakmem 1000000 400 1
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```
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- 結果 (環境: リリースビルド, ws=400, iters=1M):
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- Throughput: **31,779,973 ops/s** (time=0.031s)
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- perf stat: cycles=205,322,023 / instructions=385,092,104 / task-clock=51.40ms / page-faults=6,702
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- `[SS_OS_STATS]` : alloc=2 free=4 madvise=2 madvise_enomem=0 madvise_disabled=0 mmap_total=2
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- 所感:
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- v4 (C7+C6) 強制時の pf/OS 基準値。v3 基準 (~40M) より遅めだが、pf 数値と OS stats を PF2 の起点として固定。
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- 今後 SmallSegmentBox_v4 を繋ぐ A/B では、page-faults/SS_OS_STATS をこの値からどこまで下げられるかを指標にする。
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## PF3: smallsegment_v4 ゲート A/B（C7+C6 v4 強制）
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- コマンド (Release, v4: C7+C6, v3 OFF):
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```
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HAKMEM_PROFILE=MIXED_TINYV3_C7_SAFE \
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HAKMEM_BENCH_MIN_SIZE=16 \
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HAKMEM_BENCH_MAX_SIZE=1024 \
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HAKMEM_SMALL_HEAP_V4_ENABLED=1 \
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HAKMEM_SMALL_HEAP_V4_CLASSES=0xC0 \
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HAKMEM_SMALL_HEAP_V3_ENABLED=0 \
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HAKMEM_SMALL_HEAP_V3_CLASSES=0 \
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perf stat -e cycles,instructions,task-clock,page-faults \
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HAKMEM_SMALL_SEGMENT_V4_ENABLED=0 ./bench_random_mixed_hakmem 1000000 400 1
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perf stat -e cycles,instructions,task-clock,page-faults \
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HAKMEM_SMALL_SEGMENT_V4_ENABLED=1 ./bench_random_mixed_hakmem 1000000 400 1
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```
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- 結果 (ws=400, iters=1M):
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- OFF: Throughput **28,890,266 ops/s**, page-faults=6,744, task-clock=54.84ms
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- ON : Throughput **28,849,781 ops/s**, page-faults=6,746, task-clock=61.49ms
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- 所感:
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- smallsegment_v4 ゲートを通しても pf/ops はほぼ変化なし（現状は Tiny v1 lease 経由の薄い実装）。
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- 「Segment 経由の入り口」はできたので、PF4 以降で専用 mmap/segment 分割を実装して再 A/B する。
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## DEBUG perf (cycles:u, -O0/-g, v4=C7+C6)
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- ビルド:
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```
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make clean
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CFLAGS='-O0 -g' USE_LTO=0 OPT_LEVEL=0 NATIVE=0 make bench_random_mixed_hakmem -j4
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```
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- コマンド:
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```
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HAKMEM_PROFILE=DEBUG_TINY_FRONT_PERF \
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HAKMEM_BENCH_MIN_SIZE=16 \
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HAKMEM_BENCH_MAX_SIZE=1024 \
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HAKMEM_SMALL_HEAP_V4_ENABLED=1 \
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HAKMEM_SMALL_HEAP_V4_CLASSES=0xC0 \
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HAKMEM_SMALL_HEAP_V3_ENABLED=0 \
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perf record -F 5000 --call-graph dwarf -e cycles:u \
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-o perf.data.pf_v4 ./bench_random_mixed_hakmem 1000000 400 1
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```
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- Throughput: **15,173,790 ops/s** (DEBUG, ws=400, iters=1M, v4=C7+C6)
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- self% 上位 (perf report --stdio):
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- free 14.37%（small_heap_free_fast_v4 内 3.39%）
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- tiny_alloc_gate_fast 13.33%
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- main 12.93%
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- malloc 7.09%
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- ss_map_lookup 4.97% / hak_super_registry_init + memset 合算 ~4.5%
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- small_heap_alloc_fast_v4 2.23%
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- hak_tiny_size_to_class 2.21% / tiny_route_get 2.34% / front_gate_unified_enabled 2.36% / tiny_route_is_heap_kind 2.09%
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- xorshift32 2.08%
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- メモ:
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- v4 強制下でも gate/classify/ss_map_lookup が依然目立つ。Segment/OS 側が整えば pf と合わせて自明に下がるかを PF3 で確認。
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