Adding scripts, commands, and logging scaffolding

scripts/plot_epi.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+import csv
+import os
+from collections import defaultdict
+
+import matplotlib.pyplot as plt
+
+ROOT = "/home/carlos/projects/gem5"
+OUT_DATA = os.path.join(ROOT, "gem5-data", "SmartEdgeAI", "results")
+OUT_IOT = os.path.join(ROOT, "iot", "results")
+src = os.path.join(OUT_DATA, "summary_energy.csv")
+out_data = os.path.join(OUT_DATA, "fig_epi_across_workloads.png")
+out_iot = os.path.join(OUT_IOT, "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_data)
+plt.savefig(out_iot)
+print(f"[plot] wrote {out_data} and mirrored to {out_iot}")