The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/c5e14be9b5a38349bb10c3ea7625353aae62da38

commit c5e14be9b5a38349bb10c3ea7625353aae62da38
Author: Ilja H. Friedel <ihf@chromium.org>
Date: Tue Jan 24 07:04:18 2017

glbench: add temperature sensor paths for kevin/elm.

This is a workaround. A better fix will consist in calling
a helper python script which calls
autotest/bin/site_utils.py:def get_current_temperature_max()

BUG= chromium:684189 
TEST=None

Change-Id: I7f61b4f6b3c18c721716021ba9a9f08df53b8b5b
Reviewed-on: https://chromium-review.googlesource.com/430859
Commit-Ready: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Ilja H. Friedel <ihf@chromium.org>
Reviewed-by: Haixia Shi <hshi@chromium.org>

[modify] https://crrev.com/c5e14be9b5a38349bb10c3ea7625353aae62da38/client/deps/glbench/src/utils.cc

We had one good run.
https://wmatrix.googleplex.com/testrun/unfiltered?test_ids=421505011

The machine came in fairly hot, so it didn't try to cool too much. But it did wait 1-2s between each subtests and never. No higher temperature than 46'C was observed (before 62'C). Should be better now.

Bench: Cooled down to 45.1'C (initial=40.0'C) after waiting 1.0s.
@RESULT: texture_upload_luminance_teximage2d_2048      =    5151.53 mtexel_sec      [none]
Bench: Cooled down to 42.7'C (initial=40.0'C) after waiting 2.0s.
@RESULT: texture_upload_luminance_texsubimage2d_32     =     645.18 mtexel_sec      [none]

I should still unify both measurement paths. So not closing.

I am currently OOO for graduation in May/5. Would try to find a way to unify once I am back. 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/6dadbab63a63cce477b7dab505fa852a97903b05

commit 6dadbab63a63cce477b7dab505fa852a97903b05
Author: Po-Hsien Wang <pwang@chromium.org>
Date: Fri Jun 02 06:49:34 2017

temperature.py: unify temperature measurement

Unify measurement of temperature in autotest and GLBench
Now GLBench calls autotest/bin/temperature.py to get the
temperature measurement from autotest utils.py

1) Add temperature.py to client/bin
   Usage: temperature.py [-h] [-m | -c] [-v]
2) Modify glbench/utils.cc to use temperature.py for
   temperature measurement

BUG= chromium:684189 
TEST=test_that graphics_GLBench, glbench

Change-Id: Icbba61d783cd530817a1049805969866326bdda8
Reviewed-on: https://chromium-review.googlesource.com/499155
Commit-Ready: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Ilja H. Friedel <ihf@chromium.org>
Reviewed-by: Ilja H. Friedel <ihf@chromium.org>

[modify] https://crrev.com/6dadbab63a63cce477b7dab505fa852a97903b05/client/site_tests/graphics_GLBench/graphics_GLBench.py
[modify] https://crrev.com/6dadbab63a63cce477b7dab505fa852a97903b05/client/deps/glbench/src/utils.cc
[add] https://crrev.com/6dadbab63a63cce477b7dab505fa852a97903b05/client/bin/temperature.py

Based on https://pantheon.corp.google.com/storage/browser/chromeos-autotest-results/122280488-chromeos-test/chromeos6-row21-rack2-host17/graphics_GLBench/ 
The temperature seems reasonable to me.

06/08 21:50:57.397 DEBUG|             utils:0298| [stdout] Bench: Cooled down to 59.0'C (initial=54.0'C) after waiting 4.8s.
06/08 21:50:57.397 DEBUG|             utils:0298| [stdout] @RESULT: texture_update_rgba_teximage2d_256            =    2866.77 mtexel_sec      [texture_update_rgba_teximage2d_256.pixmd5-20b8faaa96217834f4d7e7afce992b45.png]
06/08 21:50:57.397 DEBUG|             utils:0298| [stdout] Bench: Cooled down to 59.0'C (initial=54.0'C) after waiting 27.3s.
06/08 21:50:57.398 DEBUG|             utils:0298| [stdout] @RESULT: texture_update_rgba_teximage2d_512            =    3800.75 mtexel_sec      [texture_update_rgba_teximage2d_512.pixmd5-20b8faaa96217834f4d7e7afce992b45.png]
06/08 21:50:57.398 DEBUG|             utils:0298| [stdout] Bench: Cooled down to 59.0'C (initial=54.0'C) after waiting 7.1s.
06/08 21:50:57.398 DEBUG|             utils:0298| [stdout] @RESULT: texture_update_rgba_teximage2d_768            =    3380.47 mtexel_sec      [texture_update_rgba_teximage2d_768.pixmd5-20b8faaa96217834f4d7e7afce992b45.png]
06/08 21:50:57.398 DEBUG|             utils:0298| [stdout] Bench: Cooled down to 59.0'C (initial=54.0'C) after waiting 3.6s.
06/08 21:50:57.823 INFO |              perf:0110| PerfControl CPU temperature = 60.0
06/08 21:50:58.888 INFO |              perf:0110| PerfControl CPU temperature = 59.0
06/08 21:50:59.976 INFO |              perf:0110| PerfControl CPU temperature = 62.0
06/08 21:51:01.054 INFO |              perf:0110| PerfControl CPU temperature = 61.0
06/08 21:51:02.118 INFO |              perf:0110| PerfControl CPU temperature = 59.0
06/08 21:51:03.211 INFO |              perf:0110| PerfControl CPU temperature = 63.0

Pretty hot (lab is warm these days), but reasonable. Thanks!