Debug Counters Implementation - Clean History

Major Features:
- Debug counter infrastructure for Refill Stage tracking
- Free Pipeline counters (ss_local, ss_remote, tls_sll)
- Diagnostic counters for early return analysis
- Unified larson.sh benchmark runner with profiles
- Phase 6-3 regression analysis documentation

Bug Fixes:
- Fix SuperSlab disabled by default (HAKMEM_TINY_USE_SUPERSLAB)
- Fix profile variable naming consistency
- Add .gitignore patterns for large files

Performance:
- Phase 6-3: 4.79 M ops/s (has OOM risk)
- With SuperSlab: 3.13 M ops/s (+19% improvement)

This is a clean repository without large log files.

🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>

archive/experimental_scripts/sweep_ultra_params.sh

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Sweep Ultra params for 16/32/64B: per-class batch and sll cap
+# Usage: scripts/sweep_ultra_params.sh [cycles] [batch]
+
+ROOT_DIR=$(cd "$(dirname "$0")/.." && pwd)
+cd "$ROOT_DIR"
+
+cycles=${1:-60000}
+batch=${2:-200}
+
+make -s bench_fast >/dev/null
+
+TS=$(date +%Y%m%d_%H%M%S)
+OUTDIR="bench_results/ultra_param_${TS}"
+mkdir -p "$OUTDIR"
+CSV="$OUTDIR/results.csv"
+echo "size,class,batch_size,sll_cap,bench_batch,cycles,throughput_mops" > "$CSV"
+
+size_to_class() {
+  case "$1" in
+    16) echo 1;;
+    32) echo 2;;
+    64) echo 3;;
+    *) echo -1;;
+  esac
+}
+
+run_case() {
+  local size="$1"; shift
+  local ubatch="$1"; shift
+  local cap="$1"; shift
+  local cls=$(size_to_class "$size")
+  local log="$OUTDIR/u_${size}_b=${ubatch}_cap=${cap}.log"
+  local BVAR="HAKMEM_TINY_ULTRA_BATCH_C${cls}=${ubatch}"
+  local CVAR="HAKMEM_TINY_ULTRA_SLL_CAP_C${cls}=${cap}"
+  env HAKMEM_TINY_ULTRA=1 HAKMEM_TINY_ULTRA_VALIDATE=0 HAKMEM_TINY_MAG_CAP=128 \
+      "$BVAR" "$CVAR" \
+      ./bench_tiny_hot_hakmem "$size" "$batch" "$cycles" >"$log" 2>&1 || true
+  thr=$(sed -n 's/^Throughput: \([0-9.][0-9.]*\) M ops.*/\1/p' "$log" | tail -n1)
+  if [[ -n "$thr" ]]; then
+    echo "$size,$cls,$ubatch,$cap,$batch,$cycles,$thr" >> "$CSV"
+  fi
+}
+
+# Modest sweep ranges for speed
+b16=(64 80 96)
+c16=(256 384)
+b32=(96 112 128)
+c32=(256 384)
+b64=(192 224 256)
+c64=(768 1024)
+
+for bb in "${b16[@]}"; do
+  for cc in "${c16[@]}"; do run_case 16 "$bb" "$cc"; done
+done
+for bb in "${b32[@]}"; do
+  for cc in "${c32[@]}"; do run_case 32 "$bb" "$cc"; done
+done
+for bb in "${b64[@]}"; do
+  for cc in "${c64[@]}"; do run_case 64 "$bb" "$cc"; done
+done
+
+echo "[done] CSV: $CSV"
+sed -n '1,40p' "$CSV" || true