A couple of these failures, might be worth digging into.

https://luci-milo.appspot.com/buildbot/chromeos/elm-paladin/6244
https://luci-milo.appspot.com/buildbot/chromeos/elm-paladin/6135


--------------------------------- LOGS

05/13 21:38:57.888 DEBUG|              test:0410| Test failed due to Failed: Did not see the min DVFS clock. . Exception log follows the after_iteration_hooks.
05/13 21:38:57.888 DEBUG|              test:0415| Starting after_iteration_hooks for graphics_Idle
05/13 21:38:57.889 DEBUG|      base_sysinfo:0124| Loggable saves logs to /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1/interrupts.after
05/13 21:38:57.890 DEBUG|             utils:0214| Running 'mkdir -p /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1/var/spool'
05/13 21:38:57.891 DEBUG|      global_hooks:0056| 'mkdir -p /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1/var/spool'
05/13 21:38:57.901 DEBUG|             utils:0214| Running 'rsync --no-perms --chmod=ugo+r -a --safe-links --exclude=/crash/**autoserv* --exclude=/crash/*.core /var/spool/crash /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1/var/spool'
05/13 21:38:57.901 DEBUG|      global_hooks:0056| 'rsync --no-perms --chmod=ugo+r -a --safe-links --exclude=/crash/**autoserv* --exclude=/crash/*.core /var/spool/crash /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1/var/spool'
05/13 21:38:57.913 DEBUG|             utils:0214| Running 'rm -rf /var/spool/crash/*'
05/13 21:38:57.914 DEBUG|      global_hooks:0056| 'rm -rf /var/spool/crash/*'
05/13 21:38:57.924 DEBUG|      base_sysinfo:0124| Loggable saves logs to /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1/meminfo.after
05/13 21:38:57.925 DEBUG|      base_sysinfo:0124| Loggable saves logs to /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1/slabinfo.after
05/13 21:38:57.926 DEBUG|      base_sysinfo:0124| Loggable saves logs to /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1/schedstat.after
05/13 21:38:57.927 DEBUG|             utils:0214| Running 'logger "autotest finished iteration /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1"'
05/13 21:38:57.927 DEBUG|      global_hooks:0056| 'logger "autotest finished iteration /usr/local/autotest/results/default/graphics_Idle/sysinfo/iteration.1"'
05/13 21:38:57.936 DEBUG|              test:0420| after_iteration_hooks completed
05/13 21:38:57.936 WARNI|              test:0637| The test failed with the following exception
Traceback (most recent call last):
  File "/usr/local/autotest/common_lib/test.py", line 631, in _exec
    _call_test_function(self.execute, *p_args, **p_dargs)
  File "/usr/local/autotest/common_lib/test.py", line 831, in _call_test_function
    return func(*args, **dargs)
  File "/usr/local/autotest/common_lib/test.py", line 495, in execute
    dargs)
  File "/usr/local/autotest/common_lib/test.py", line 362, in _call_run_once_with_retry
    postprocess_profiled_run, args, dargs)
  File "/usr/local/autotest/common_lib/test.py", line 400, in _call_run_once
    self.run_once(*args, **dargs)
  File "/usr/local/autotest/tests/graphics_Idle/graphics_Idle.py", line 63, in run_once
    raise error.TestFail('Failed: %s' % errors)
TestFail: Failed: Did not see the min DVFS clock.