Add a simple 8x benchmark script

Signed-off-by: David Shah <davey1576@gmail.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/ice40/picorv32_benchmark.py b/ice40/picorv32_benchmark.py
new file mode 100755
index 00000000..9544db50
--- /dev/null
+++ b/ice40/picorv32_benchmark.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+import os, sys, threading
+from os import path
+import subprocess
+import re
+
+num_runs = 8
+
+if not path.exists("picorv32.json"):
+    os.remove("picorv32.json")
+    subprocess.run(["wget", "https://raw.githubusercontent.com/cliffordwolf/picorv32/master/picorv32.v"], check=True)
+    subprocess.run(["yosys", "-q", "-p", "synth_ice40 -json picorv32.json -top top", "picorv32.v", "picorv32_top.v"], check=True)
+
+fmax = {}
+
+if not path.exists("picorv32_work"):
+    os.mkdir("picorv32_work")
+
+threads = []
+
+for i in range(num_runs):
+    def runner(run):
+        ascfile = "picorv32_work/picorv32_s{}.asc".format(run)
+        if path.exists(ascfile):
+            os.remove(ascfile)
+        result = subprocess.run(["../nextpnr-ice40", "--hx8k", "--seed", str(run), "--json", "picorv32.json", "--asc", ascfile], stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL)
+        if result.returncode != 0:
+            print("Run {} failed!".format(run))
+        else:
+            icetime_res = subprocess.check_output(["icetime", "-d", "hx8k", ascfile])
+            fmax_m = re.search(r'\(([0-9.]+) MHz\)', icetime_res.decode('utf-8'))
+            fmax[run] = float(fmax_m.group(1))
+    threads.append(threading.Thread(target=runner, args=[i+1]))
+
+for t in threads: t.start()
+for t in threads: t.join()
+
+fmax_min = min(fmax.values())
+fmax_max = max(fmax.values())
+fmax_avg = sum(fmax.values()) / len(fmax)
+
+print("{}/{} runs passed".format(len(fmax), num_runs))
+print("icetime: min = {} MHz, avg = {} MHz, max = {} MHz".format(fmax_min, fmax_avg, fmax_max))