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%% SOURCE: docs/working/experiments/campaigns/l8_validation/README.md
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%% FITS: experiments/ch-l8-map
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\section{L8 Jacquard Mode Selector Validation Experiment}

This experiment validates the L8 Jacquard mode selector by comparing
dynamic adaptive mode switching against static optimal configurations across
five workload types. Its empirical basis is the $2^7$ factorial DoE
(38{,}400 runs), which identified L1 and L4 as harmful and established
workload-specific optimal configurations for L2, L3, L5, and L6.

%% PATENT: the L8 Jacquard dynamic mode selector is patent-adjacent.
%% Do not draft claims here.

\subsection{Experimental Design}

\textbf{Type:} $8 \times 5$ factorial design.
\textbf{Independent variables:} control strategy (8 levels) and workload
type (5 levels). \textbf{Primary dependent variables:} \texttt{ns\_per\_word}
and \texttt{cv}.

\subsubsection{Control Strategies}

\begin{center}
\begin{tabular}{llrrrrrrrl}
\toprule
Strategy & L1 & L2 & L3 & L4 & L5 & L6 & L7 & Description \\
\midrule
L8\_ADAPTIVE       & 0 & rt & rt & 0 & rt & rt & 1 & Dynamic switching \\
C0\_BASELINE       & 0 &  0 &  0 & 0 &  0 &  0 & 1 & Minimal \\
C4\_TEMPORAL       & 0 &  0 &  1 & 0 &  0 &  0 & 1 & Decay only \\
C7\_FULL\_INF      & 0 &  0 &  1 & 0 &  1 &  1 & 1 & Full inference \\
C9\_DIVERSE\_DECAY & 0 &  1 &  0 & 0 &  0 &  1 & 1 & Window + decay\_inf \\
C11\_DIVERSE\_INF  & 0 &  1 &  0 & 0 &  1 &  1 & 1 & Window + inference \\
C12\_DIVERSE\_TEMP & 0 &  1 &  1 & 0 &  0 &  0 & 1 & Window + decay \\
ALL\_ON            & 0 &  1 &  1 & 0 &  1 &  1 & 1 & All except L1/L4 \\
\bottomrule
\end{tabular}
\end{center}

(rt = runtime-selected by L8 mode selector)

\subsubsection{Workload Types}

\begin{center}
\begin{tabular}{lll}
\toprule
Workload    & Characteristics & Expected L8 Mode \\
\midrule
STABLE      & Predictable, repetitive            & C0 or C4 \\
DIVERSE     & High entropy, mixed operations     & C9, C11, or C12 \\
VOLATILE    & High CV, random branching          & C1 or C7 \\
TEMPORAL    & Strong locality, nested loops      & C4 or C12 \\
TRANSITION  & Phase shifts between workloads     & Adaptive \\
\bottomrule
\end{tabular}
\end{center}

\subsection{Hypotheses}

\begin{description}
  \item[H1 (Performance).] L8\_ADAPTIVE matches or exceeds the best static
        configuration per workload, within a 5\% margin.
  \item[H2 (Stability).] L8\_ADAPTIVE shows lower overall CV than any
        single static configuration across all workloads.
  \item[H3 (Adaptation).] The L8 mode distribution correlates with
        workload characteristics.
  \item[H4 (Generalization).] L8\_ADAPTIVE outperforms all static
        configurations on the TRANSITION workload.
\end{description}

\subsection{Running the Experiment}

\begin{lstlisting}[language=bash]
# Quick test (10 reps = 400 runs, ~8 minutes)
cd experiments/l8_validation
./run_l8_validation.sh 10

# Standard validation (50 reps = 2,000 runs, ~40 minutes)
./run_l8_validation.sh 50

# High precision (100 reps = 4,000 runs, ~80 minutes)
./run_l8_validation.sh 100
\end{lstlisting}

\subsection{Analysis}

\begin{lstlisting}[language=bash]
Rscript analyze_l8.R l8_validation_YYYYMMDD_HHMMSS
\end{lstlisting}

Expected plots: ANOVA interaction plot (strategy $\times$ workload), L8 mode
distribution per workload, Pareto frontier (speed vs.\ stability), and
convergence curves showing mode switches.

\subsection{Success Criteria}

\begin{enumerate}
  \item L8\_ADAPTIVE is at most 5\% slower than the best static
        configuration per workload.
  \item L8\_ADAPTIVE exhibits the lowest CV across all workloads.
  \item L8 mode selections align with expected workload-specific patterns.
  \item L8\_ADAPTIVE dominates all static configurations on TRANSITION.
\end{enumerate}