Adding scripts, commands, and logging scaffolding"

scripts/50_plot_epi.py

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+#!/usr/bin/env python3
+import csv, os
+import matplotlib.pyplot as plt
+from collections import defaultdict
+
+root = os.path.dirname(os.path.dirname(__file__))
+src = os.path.join(root, "results", "phase3_summary_energy.csv")
+out = os.path.join(root, "results", "fig_epi_across_workloads.png")
+
+epi_by_core = defaultdict(list)
+with open(src) as f:
+    r=csv.DictReader(f)
+    for row in r:
+        insts=float(row['insts']); energy=float(row['energy_J'])
+        epi = 1e12*energy/insts if insts>0 else 0.0
+        epi_by_core[row['core']].append(epi)
+
+cores=['big','little','hybrid']
+vals=[sum(epi_by_core[c])/max(1,len(epi_by_core[c])) for c in cores]
+
+plt.figure()
+plt.bar(cores, vals)
+plt.ylabel('EPI (pJ/inst)')
+plt.title('Energy per Instruction across Workloads (avg by core mode)')
+plt.tight_layout()
+plt.savefig(out)
+print(f"[plot] wrote {out}")
+