Simple script to measure SurfaceFlinger fps

Bug: skia:
Change-Id: I063c832f6d292e5e9f615c881e3325eb4ab9cdfa
Reviewed-on: https://skia-review.googlesource.com/44681
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/tools/android/measure_fps.py b/tools/android/measure_fps.py
new file mode 100644
index 0000000000..7ec80dcc56
--- /dev/null
+++ b/tools/android/measure_fps.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+
+# Copyright 2017 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import optparse
+import re
+import subprocess
+import time
+
+
+def query_surfaceflinger_frame_count():
+  parcel = subprocess.Popen("adb shell service call SurfaceFlinger 1013",
+                            stdout=subprocess.PIPE, stderr=subprocess.PIPE,
+                            shell=True).communicate()[0]
+  if not parcel:
+    raise Exception("FAILED: adb shell service call SurfaceFlinger 1013")
+
+  framecount = re.search("Result: Parcel\(([a-f0-9]+) ", parcel)
+  if not framecount:
+    raise Exception("Unexpected result from SurfaceFlinger: " + parcel)
+
+  return int(framecount.group(1), 16)
+
+
+def main(interval):
+  startframe = query_surfaceflinger_frame_count()
+  starttime = time.time()
+
+  while True:
+    time.sleep(interval)
+
+    endframe = query_surfaceflinger_frame_count()
+    endtime = time.time()
+    fps = (endframe - startframe) / (endtime - starttime)
+    print "%.2f" % fps
+
+    startframe = endframe
+    starttime = endtime
+
+
+if __name__ == '__main__':
+  parser = optparse.OptionParser()
+  parser.add_option("-i", "--interval", type="int", default="2",
+                    help="Number of seconds to count frames.")
+  options, args = parser.parse_args()
+  main(options.interval)
+