142 lines
3.9 KiB
Markdown
142 lines
3.9 KiB
Markdown
# Phase 89 SSOT Measurement Capture
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**Timestamp**: 2025-12-18 23:06:01
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**Git SHA**: e4c5f0535
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**Branch**: master
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---
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## Step 1: OBSERVE Binary (Telemetry Verification)
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**Binary**: `./bench_random_mixed_hakmem_observe`
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**Profile**: `MIXED_TINYV3_C7_SAFE`
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**Iterations**: 20,000,000
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**Working Set**: 400
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**Inline Slots Overflow Stats (Preflight Verification)**:
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- PUSH TOTAL: 4,812,031 ops (C4+C5+C6 verified active)
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- POP TOTAL: 4,812,031 ops
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- PUSH FULL: 0 (0.00%)
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- POP EMPTY: 168 (0.003%)
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- LEGACY FALLBACK CALLS: 5,327,294
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- Judgment: ✓ \[C\] LEGACY used AND C4/C5/C6 INLINE SLOTS ACTIVE
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- Throughput (with telemetry): **51.52M ops/s**
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---
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## Step 2: Standard Build (Clean Performance Baseline)
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**Binary**: `./bench_random_mixed_hakmem`
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**Build Flags**: RELEASE, no telemetry, standard optimization
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**Profile**: `MIXED_TINYV3_C7_SAFE`
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**Iterations**: 20,000,000
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**Working Set**: 400
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**Runs**: 10
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**10-Run Results**:
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| Run | Throughput | Status |
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|-----|-----------|--------|
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| 1 | 51.15M | OK |
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| 2 | 51.44M | OK |
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| 3 | 51.61M | OK |
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| 4 | 51.73M | Peak |
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| 5 | 50.74M | Low |
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| 6 | 51.34M | OK |
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| 7 | 50.74M | Low |
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| 8 | 51.37M | OK |
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| 9 | 51.39M | OK |
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| 10 | 51.31M | OK |
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**Statistics**:
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- **Mean**: 51.36M ops/s
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- **Min**: 50.74M ops/s
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- **Max**: 51.73M ops/s
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- **Range**: 0.99M ops/s
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- **CV**: ~0.7%
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---
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## Step 3: FAST PGO Build (Optimized Performance Tracking)
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**Binary**: `./bench_random_mixed_hakmem_minimal_pgo`
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**Build Flags**: RELEASE, PGO optimized, BENCH_MINIMAL=1
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**Profile**: `MIXED_TINYV3_C7_SAFE`
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**Iterations**: 20,000,000
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**Working Set**: 400
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**Runs**: 10
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**10-Run Results**:
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| Run | Throughput | Status |
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|-----|-----------|--------|
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| 1 | 55.13M | Peak |
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| 2 | 54.73M | High |
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| 3 | 53.81M | OK |
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| 4 | 54.60M | High |
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| 5 | 55.02M | Peak |
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| 6 | 52.89M | Low |
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| 7 | 53.61M | OK |
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| 8 | 53.53M | OK |
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| 9 | 55.08M | Peak |
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| 10 | 53.51M | OK |
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**Statistics**:
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- **Mean**: 54.16M ops/s
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- **Min**: 52.89M ops/s
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- **Max**: 55.13M ops/s
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- **Range**: 2.24M ops/s
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- **CV**: ~1.5%
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---
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## Performance Delta Analysis
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**Standard vs FAST PGO**:
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- Delta: 54.16M - 51.36M = **2.80M ops/s**
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- Percentage Gain: (2.80M / 51.36M) × 100 = **5.45%**
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**Interpretation**:
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- FAST PGO is 5.45% faster than Standard build
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- This represents the optimization ceiling with current profile-guided configuration
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- SSOT baseline for bottleneck analysis: **Standard 51.36M ops/s**
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---
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## Environment Configuration (SSOT Locked)
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**Key ENV variables** (forced in `scripts/run_mixed_10_cleanenv.sh`):
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- `HAKMEM_BENCH_MIN_SIZE=16` - SSOT: prevent size drift
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- `HAKMEM_BENCH_MAX_SIZE=1040` - SSOT: prevent class filtering
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- `HAKMEM_BENCH_C5_ONLY=0` - SSOT: no single-class mode
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- `HAKMEM_BENCH_C6_ONLY=0` - SSOT: no single-class mode
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- `HAKMEM_BENCH_C7_ONLY=0` - SSOT: no single-class mode
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- `HAKMEM_WARM_POOL_SIZE=16` - Phase 69 winner
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- `HAKMEM_TINY_C4_INLINE_SLOTS=1` - Phase 76-1 promoted
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- `HAKMEM_TINY_C5_INLINE_SLOTS=1` - Phase 75-2 promoted
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- `HAKMEM_TINY_C6_INLINE_SLOTS=1` - Phase 75-1 promoted
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- `HAKMEM_TINY_INLINE_SLOTS_FIXED=1` - Phase 78-1 promoted
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- `HAKMEM_TINY_INLINE_SLOTS_SWITCHDISPATCH=1` - Phase 80-1 promoted
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- `HAKMEM_TINY_INLINE_SLOTS_SWITCHDISPATCH_FIXED=0` - Phase 83-1 NO-GO
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- `HAKMEM_FASTLANE_DIRECT=1` - Phase 19-1b promoted
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- `HAKMEM_FREE_TINY_FAST_MONO_DUALHOT=1` - Phase 9/10 promoted
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- `HAKMEM_FREE_TINY_FAST_MONO_LEGACY_DIRECT=1` - Phase 10 promoted
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- `HAKMEM_PROFILE=MIXED_TINYV3_C7_SAFE` - default route
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---
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## System Configuration
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- **CPU**: AMD Ryzen 7 5825U with Radeon Graphics
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- **Cores**: 16
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- **Memory**: MemTotal: 13166508 kB
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- **Kernel**: 6.8.0-87-generic
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---
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## Next Steps (Phase 89 Step 5)
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**Objective**: Identify top 3 bottleneck candidates using perf measurement
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- Run `perf top` during Mixed SSOT execution
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- Analyze top 50 functions by CPU time
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- Filter to high-frequency code paths (avoid 0.001% optimizations)
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- Prepare recommendations for Phase 90+
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