peach-pit-chrome-pfq builds failed HWTest consistently starting from 12/07, see the starting build:  https://uberchromegw.corp.google.com/i/chromeos/builders/peach_pit-chrome-pfq/builds/4484 

Selected error messages:
Triggered task: peach_pit-chrome-pfq/R65-10196.0.0-rc2-sanity
chromeos-golo-server2-19: 3a4fae4f5e0bcb10 3
  Autotest instance created: cautotest-prod
  TestLabException: Not enough DUTs for board: peach_pit, pool: bvt; required: 1, found: 0
  Traceback (most recent call last):
    File "/usr/local/autotest/site_utils/run_suite.py", line 2015, in _run_task
      return _run_suite(options)
    File "/usr/local/autotest/site_utils/run_suite.py", line 1756, in _run_suite
      options.skip_duts_check)
    File "/usr/local/autotest/site_utils/diagnosis_utils.py", line 330, in check_dut_availability
      hosts=hosts)
  NotEnoughDutsError: Not enough DUTs for board: peach_pit, pool: bvt; required: 1, found: 0
  Will return from run_suite with status: INFRA_FAILURE
cmd=['/b/c/cbuild/repository/chromite/third_party/swarming.client/swarming.py', 'run', '--swarming', 'chromeos-proxy.appspot.com', '--task-summary-json', '/tmp/cbuildbot-tmpqU8VoE/tmpOFFW2s/temp_summary.json', '--raw-cmd', '--task-name', u'peach_pit-chrome-pfq/R65-10196.0.0-rc2-sanity', '--dimension', 'os', 'Ubuntu-14.04', '--dimension', 'pool', 'default', '--print-status-updates', '--timeout', '14400', '--io-timeout', '14400', '--hard-timeout', '14400', '--expiration', '1200', u'--tags=priority:PFQ', u'--tags=suite:sanity', u'--tags=build:peach_pit-chrome-pfq/R65-10196.0.0-rc2', u'--tags=task_name:peach_pit-chrome-pfq/R65-10196.0.0-rc2-sanity', u'--tags=board:peach_pit', '--', '/usr/local/autotest/site_utils/run_suite.py', '--build', u'peach_pit-chrome-pfq/R65-10196.0.0-rc2', '--board', u'peach_pit', '--suite_name', u'sanity', '--pool', u'bvt', '--file_bugs', 'True', '--priority', 'PFQ', '--timeout_mins', '180', '--retry', 'True', '--max_retries', '5', '--minimum_duts', '1', '--suite_min_duts', '1', '--offload_failures_only', 'False', '--job_keyvals', "{'cidb_build_stage_id': 64565677L, 'cidb_build_id': 2111870, 'datastore_parent_key': ('Build', 2111870, 'BuildStage', 64565677L)}", '-c']
Autotest instance created: cautotest-prod
TestLabException: Not enough DUTs for board: peach_pit, pool: bvt; required: 1, found: 0
Traceback (most recent call last):
  File "/usr/local/autotest/site_utils/run_suite.py", line 2015, in _run_task
    return _run_suite(options)
  File "/usr/local/autotest/site_utils/run_suite.py", line 1756, in _run_suite
    options.skip_duts_check)
  File "/usr/local/autotest/site_utils/diagnosis_utils.py", line 330, in check_dut_availability
    hosts=hosts)
NotEnoughDutsError: Not enough DUTs for board: peach_pit, pool: bvt; required: 1, found: 0