The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform/experimental/+/925176b619bbb1213ec73be61bddbc8f86002bb2

commit 925176b619bbb1213ec73be61bddbc8f86002bb2
Author: Vovo Yang <vovoy@google.com>
Date: Thu Jan 25 10:43:17 2018

fps_meter: measuring fps with ftrace

Sample output:
[111111111111111111111111111111111111111111111111111111111111] FPS: 60
[11111111111111 11111111111111111111 11111111 111111111111111] FPS: 57
[111111111111111111111111111111111    11111111111111111111111] FPS: 56

BUG= chromium:805780 
TEST=manual test

Change-Id: Id174a1027aca4e7d3365338331a64f16cf886f04
Reviewed-on: https://chromium-review.googlesource.com/880532
Commit-Ready: Vovo Yang <vovoy@chromium.org>
Tested-by: Vovo Yang <vovoy@chromium.org>
Reviewed-by: Cheng-Yu Lee <cylee@google.com>

[add] https://crrev.com/925176b619bbb1213ec73be61bddbc8f86002bb2/fps_meter/fps_meter.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/e6db97adfa753a163c2bd5a8760087c90fa86647

commit e6db97adfa753a163c2bd5a8760087c90fa86647
Author: Ben Cheng <bccheng@google.com>
Date: Sat Jan 27 16:25:38 2018

Add fps_meter to test image

BUG= chromium:805780 
TEST=emerge-${BOARD} fps_meter
CQ-DEPEND=CL:880532

Change-Id: I77dc48fbd978482692059bb935befdf843c5836a
Reviewed-on: https://chromium-review.googlesource.com/880534
Commit-Ready: Vovo Yang <vovoy@chromium.org>
Tested-by: Vovo Yang <vovoy@chromium.org>
Reviewed-by: Ben Cheng <bccheng@chromium.org>

[add] https://crrev.com/e6db97adfa753a163c2bd5a8760087c90fa86647/dev-util/fps_meter/fps_meter-9999.ebuild
[modify] https://crrev.com/e6db97adfa753a163c2bd5a8760087c90fa86647/virtual/target-chromium-os-test/target-chromium-os-test-1.ebuild
[rename] https://crrev.com/e6db97adfa753a163c2bd5a8760087c90fa86647/virtual/target-chromium-os-test/target-chromium-os-test-1-r60.ebuild

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform/experimental/+/ec36bcdf998aa98ff11dd476378255e38bb4a0c0

commit ec36bcdf998aa98ff11dd476378255e38bb4a0c0
Author: Kuo-Hsin Yang <vovoy@chromium.org>
Date: Wed Feb 14 01:40:39 2018

fps_meter: Add verbose mode to print detailed frame time

Sample output:
$ fps_meter.py -v
trace method: workq
[ 1   1  1                                                   ] FPS: 3
23.292, 23.346, 23.393

BUG= chromium:805780 
TEST=manually run verbose mode

Change-Id: I334bc597af6a0b655dd82460bc2b7667e077f6a3
Reviewed-on: https://chromium-review.googlesource.com/913629
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Vovo Yang <vovoy@chromium.org>
Reviewed-by: Cheng-Yu Lee <cylee@google.com>
Reviewed-by: Yury Khmel <khmel@google.com>

[modify] https://crrev.com/ec36bcdf998aa98ff11dd476378255e38bb4a0c0/fps_meter/fps_meter.py