Phase 89 SSOT Measurement Capture

Timestamp: 2025-12-18 23:06:01
Git SHA: e4c5f0535
Branch: master

Step 1: OBSERVE Binary (Telemetry Verification)

Binary: ./bench_random_mixed_hakmem_observe
Profile: MIXED_TINYV3_C7_SAFE
Iterations: 20,000,000
Working Set: 400

Inline Slots Overflow Stats (Preflight Verification):

PUSH TOTAL: 4,812,031 ops (C4+C5+C6 verified active)
POP TOTAL: 4,812,031 ops
PUSH FULL: 0 (0.00%)
POP EMPTY: 168 (0.003%)
LEGACY FALLBACK CALLS: 5,327,294
Judgment: ✓ [C] LEGACY used AND C4/C5/C6 INLINE SLOTS ACTIVE
Throughput (with telemetry): 51.52M ops/s

Step 2: Standard Build (Clean Performance Baseline)

Binary: ./bench_random_mixed_hakmem
Build Flags: RELEASE, no telemetry, standard optimization
Profile: MIXED_TINYV3_C7_SAFE
Iterations: 20,000,000
Working Set: 400
Runs: 10

10-Run Results:

Run	Throughput	Status
1	51.15M	OK
2	51.44M	OK
3	51.61M	OK
4	51.73M	Peak
5	50.74M	Low
6	51.34M	OK
7	50.74M	Low
8	51.37M	OK
9	51.39M	OK
10	51.31M	OK

Statistics:

Mean: 51.36M ops/s
Min: 50.74M ops/s
Max: 51.73M ops/s
Range: 0.99M ops/s
CV: ~0.7%

Step 3: FAST PGO Build (Optimized Performance Tracking)

Binary: ./bench_random_mixed_hakmem_minimal_pgo
Build Flags: RELEASE, PGO optimized, BENCH_MINIMAL=1
Profile: MIXED_TINYV3_C7_SAFE
Iterations: 20,000,000
Working Set: 400
Runs: 10

10-Run Results:

Run	Throughput	Status
1	55.13M	Peak
2	54.73M	High
3	53.81M	OK
4	54.60M	High
5	55.02M	Peak
6	52.89M	Low
7	53.61M	OK
8	53.53M	OK
9	55.08M	Peak
10	53.51M	OK

Statistics:

Mean: 54.16M ops/s
Min: 52.89M ops/s
Max: 55.13M ops/s
Range: 2.24M ops/s
CV: ~1.5%

Performance Delta Analysis

Standard vs FAST PGO:

Delta: 54.16M - 51.36M = 2.80M ops/s
Percentage Gain: (2.80M / 51.36M) × 100 = 5.45%

Interpretation:

FAST PGO is 5.45% faster than Standard build
This represents the optimization ceiling with current profile-guided configuration
SSOT baseline for bottleneck analysis: Standard 51.36M ops/s

Environment Configuration (SSOT Locked)

Key ENV variables (forced in scripts/run_mixed_10_cleanenv.sh):

HAKMEM_BENCH_MIN_SIZE=16 - SSOT: prevent size drift
HAKMEM_BENCH_MAX_SIZE=1040 - SSOT: prevent class filtering
HAKMEM_BENCH_C5_ONLY=0 - SSOT: no single-class mode
HAKMEM_BENCH_C6_ONLY=0 - SSOT: no single-class mode
HAKMEM_BENCH_C7_ONLY=0 - SSOT: no single-class mode
HAKMEM_WARM_POOL_SIZE=16 - Phase 69 winner
HAKMEM_TINY_C4_INLINE_SLOTS=1 - Phase 76-1 promoted
HAKMEM_TINY_C5_INLINE_SLOTS=1 - Phase 75-2 promoted
HAKMEM_TINY_C6_INLINE_SLOTS=1 - Phase 75-1 promoted
HAKMEM_TINY_INLINE_SLOTS_FIXED=1 - Phase 78-1 promoted
HAKMEM_TINY_INLINE_SLOTS_SWITCHDISPATCH=1 - Phase 80-1 promoted
HAKMEM_TINY_INLINE_SLOTS_SWITCHDISPATCH_FIXED=0 - Phase 83-1 NO-GO
HAKMEM_FASTLANE_DIRECT=1 - Phase 19-1b promoted
HAKMEM_FREE_TINY_FAST_MONO_DUALHOT=1 - Phase 9/10 promoted
HAKMEM_FREE_TINY_FAST_MONO_LEGACY_DIRECT=1 - Phase 10 promoted
HAKMEM_PROFILE=MIXED_TINYV3_C7_SAFE - default route

System Configuration

CPU: AMD Ryzen 7 5825U with Radeon Graphics
Cores: 16
Memory: MemTotal: 13166508 kB
Kernel: 6.8.0-87-generic

Next Steps (Phase 89 Step 5)

Objective: Identify top 3 bottleneck candidates using perf measurement

Run perf top during Mixed SSOT execution
Analyze top 50 functions by CPU time
Filter to high-frequency code paths (avoid 0.001% optimizations)
Prepare recommendations for Phase 90+

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