bring over scripts

old-commit-hash: d4d57ed7fe

scripts/waste.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+from multiprocessing import Process
+from setproctitle import setproctitle
+import os
+import numpy as np
+from common.realtime import sec_since_boot
+
+def waste(pid):
+  # set affinity
+  os.system("taskset -p %d %d" % (1 << pid, os.getpid()))
+
+  m1 = np.zeros((200,200)) + 0.8
+  m2 = np.zeros((200,200)) + 1.2
+
+  i = 1
+  st = sec_since_boot()
+  j = 0
+  while 1:
+    if (i % 100) == 0:
+      setproctitle("%3d: %8d" % (pid, i))
+      lt = sec_since_boot()
+      print("%3d: %8d %f  %.2f" % (pid, i, lt-st, j))
+      st = lt
+    i += 1
+    j = np.sum(np.matmul(m1, m2))
+
+def main(gctx=None):
+  print("1-2 seconds is baseline")
+  for i in range(4):
+    p = Process(target=waste, args=(i,))
+    p.start()
+
+if __name__ == "__main__":
+  main()
+