Index: tools/perf/sample.py
===================================================================
--- tools/perf/sample.py	(revision 0a79fd946b29c1f2da2acb823cfd70fe1b61e1d2)
+++ tools/perf/sample.py	(revision 0a79fd946b29c1f2da2acb823cfd70fe1b61e1d2)
@@ -0,0 +1,29 @@
+#!/usr/bin/python3
+
+import argparse, json, random, sys
+
+parser = argparse.ArgumentParser()
+parser.add_argument('--infile', type=argparse.FileType('r'), default=sys.stdin)
+parser.add_argument('--outfile', type=argparse.FileType('w'), default=sys.stdout)
+
+args = parser.parse_args()
+
+data = json.load(args.infile)
+
+
+
+print(len(data['values']))
+print(int(len(data['values']) / 1000))
+
+sample = random.sample(data['values'], int(len(data['values']) / 1000))
+print(len(sample))
+
+# Sort by timestamp (the second element)
+# take second element for sort
+def takeSecond(elem):
+    return elem[1]
+
+sample.sort(key=takeSecond)
+
+data['values'] = sample
+json.dump(data, args.outfile)