Module variance_analysis 

Variance Source Analysis Module (PMAT-027)

Analyzes sources of performance variance to identify and mitigate benchmark instability per PERF-003 (CV 5-8% vs target <5%).

Motivation

F605 (Results reproducible) is PARTIAL with CV 5-8%. Need systematic variance attribution to identify and mitigate sources.

Components

Component	Detection Method	Mitigation
Frequency Variance	std_dev(CPU MHz samples)	Pin frequency
Thermal Drift	Correlation(temp, latency)	Cooldown periods
Cache Noise	First-run vs warm-run delta	Warmup iterations
System Noise	Residual after above	Isolation/shielding

Structs

VarianceAnalysis

Variance analysis result

VarianceInput

Input data for variance analysis

Enums

VarianceSource

Source of performance variance