Add an activity monitor which profiles IO and CPU utilization.

build/android/device_stats_monitor.py

Index: build/android/device_stats_monitor.py
diff --git a/build/android/device_stats_monitor.py b/build/android/device_stats_monitor.py
new file mode 100755
index 0000000000000000000000000000000000000000..1d4fba2bd23689f37ebe587ba31bd10ab39a937d
--- /dev/null
+++ b/build/android/device_stats_monitor.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Provides iotop/top style profiling for android.
+
+Usage:
+  ./device_stats_monitor.py --hz=20 --duration=5 --outfile=/tmp/foo
+"""
+
+import optparse
+import os
+import sys
+import time
+
+from pylib import android_commands
+from pylib import device_stats_monitor
+
+
+def main(argv):
+  option_parser = optparse.OptionParser()
+  option_parser.add_option('--hz', type='int', default=20,
+                           help='Number of samples/sec.')
+  option_parser.add_option('--duration', type='int', default=5,
+                           help='Seconds to monitor.')
+  option_parser.add_option('--outfile', default='/tmp/devicestatsmonitor',
+                           help='Location to start output file.')
+  options, args = option_parser.parse_args(argv)
+
+  monitor = device_stats_monitor.DeviceStatsMonitor(
+      android_commands.AndroidCommands(), options.hz)
+  monitor.Start()
+  print 'Waiting for %d seconds while profiling.' % options.duration
+  time.sleep(options.duration)
+  url = monitor.StopAndCollect(options.outfile)
+  print 'View results in browser at %s' % url
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))