Fix scaling issues for some devices (e.g. Pixel)

Bug: skia:
NOTRY=true
Change-Id: Ia6a80ecb97b5d30197932ec7d340163624e315bd
Reviewed-on: https://skia-review.googlesource.com/82682
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>

9 files changed, 180 insertions, 36 deletions

diff --git a/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus5-GPU-Adreno330-arm-Debug-All-Android.json b/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus5-GPU-Adreno330-arm-Debug-All-Android.json
index d071f15843..c01913d479 100644
--- a/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus5-GPU-Adreno330-arm-Debug-All-Android.json
+++ b/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus5-GPU-Adreno330-arm-Debug-All-Android.json
@@ -540,7 +540,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "Nexus5",
       "0.6"
@@ -565,6 +565,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -579,6 +580,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -604,11 +613,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
diff --git a/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus5x-GPU-Adreno418-arm64-Release-All-Android.json b/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus5x-GPU-Adreno418-arm64-Release-All-Android.json
index d062256767..a1b6466b94 100644
--- a/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus5x-GPU-Adreno418-arm64-Release-All-Android.json
+++ b/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus5x-GPU-Adreno418-arm64-Release-All-Android.json
@@ -576,7 +576,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/opt/infra-android/tools/adb",
       "Nexus5x",
       "0.6"
@@ -601,6 +601,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -615,6 +616,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -640,11 +649,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
diff --git a/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus7-CPU-Tegra3-arm-Release-All-Android.json b/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus7-CPU-Tegra3-arm-Release-All-Android.json
index 724209825f..d31e0143a0 100644
--- a/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus7-CPU-Tegra3-arm-Release-All-Android.json
+++ b/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus7-CPU-Tegra3-arm-Release-All-Android.json
@@ -576,7 +576,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "Nexus7",
       "0.6"
@@ -601,6 +601,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -615,6 +616,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -640,11 +649,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
diff --git a/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus7-GPU-Tegra3-arm-Release-All-Android.json b/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus7-GPU-Tegra3-arm-Release-All-Android.json
index d71b006d84..a739e8f8da 100644
--- a/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus7-GPU-Tegra3-arm-Release-All-Android.json
+++ b/infra/bots/recipes/perf.expected/Perf-Android-Clang-Nexus7-GPU-Tegra3-arm-Release-All-Android.json
@@ -576,7 +576,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "Nexus7",
       "0.6"
@@ -601,6 +601,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -615,6 +616,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -640,11 +649,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
diff --git a/infra/bots/recipes/perf.expected/Perf-Android-Clang-NexusPlayer-GPU-PowerVR-x86-Release-All-Android.json b/infra/bots/recipes/perf.expected/Perf-Android-Clang-NexusPlayer-GPU-PowerVR-x86-Release-All-Android.json
index 0719286a23..51180ed4a7 100644
--- a/infra/bots/recipes/perf.expected/Perf-Android-Clang-NexusPlayer-GPU-PowerVR-x86-Release-All-Android.json
+++ b/infra/bots/recipes/perf.expected/Perf-Android-Clang-NexusPlayer-GPU-PowerVR-x86-Release-All-Android.json
@@ -576,7 +576,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "NexusPlayer",
       "0.6"
@@ -601,6 +601,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -615,6 +616,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -640,11 +649,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
diff --git a/infra/bots/recipes/perf.expected/Perf-Android-Clang-NexusPlayer-GPU-PowerVR-x86-Release-All-Android_Vulkan.json b/infra/bots/recipes/perf.expected/Perf-Android-Clang-NexusPlayer-GPU-PowerVR-x86-Release-All-Android_Vulkan.json
index 3867ca42a3..46987fe38c 100644
--- a/infra/bots/recipes/perf.expected/Perf-Android-Clang-NexusPlayer-GPU-PowerVR-x86-Release-All-Android_Vulkan.json
+++ b/infra/bots/recipes/perf.expected/Perf-Android-Clang-NexusPlayer-GPU-PowerVR-x86-Release-All-Android_Vulkan.json
@@ -576,7 +576,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "NexusPlayer",
       "0.6"
@@ -601,6 +601,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -615,6 +616,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -640,11 +649,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
diff --git a/infra/bots/recipes/perf.expected/Perf-Android-Clang-PixelC-GPU-TegraX1-arm64-Release-All-Android_Skpbench.json b/infra/bots/recipes/perf.expected/Perf-Android-Clang-PixelC-GPU-TegraX1-arm64-Release-All-Android_Skpbench.json
index 6eb5f97e79..a035f41df6 100644
--- a/infra/bots/recipes/perf.expected/Perf-Android-Clang-PixelC-GPU-TegraX1-arm64-Release-All-Android_Skpbench.json
+++ b/infra/bots/recipes/perf.expected/Perf-Android-Clang-PixelC-GPU-TegraX1-arm64-Release-All-Android_Skpbench.json
@@ -576,7 +576,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "PixelC",
       "0.6"
@@ -601,6 +601,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -615,6 +616,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -640,11 +649,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
diff --git a/infra/bots/recipes/perf.expected/cpu_scale_failed.json b/infra/bots/recipes/perf.expected/cpu_scale_failed.json
index 0e628a5f5b..e993389490 100644
--- a/infra/bots/recipes/perf.expected/cpu_scale_failed.json
+++ b/infra/bots/recipes/perf.expected/cpu_scale_failed.json
@@ -540,7 +540,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "NexusPlayer",
       "0.6"
@@ -566,6 +566,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -580,6 +581,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -605,11 +614,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
@@ -625,7 +637,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "NexusPlayer",
       "0.6"
@@ -651,6 +663,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -665,6 +678,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -690,11 +711,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
@@ -710,7 +734,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "NexusPlayer",
       "0.6"
@@ -736,6 +760,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -750,6 +775,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -775,11 +808,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
diff --git a/infra/bots/recipes/perf.expected/cpu_scale_failed_once.json b/infra/bots/recipes/perf.expected/cpu_scale_failed_once.json
index dd803e5670..21d479bb8b 100644
--- a/infra/bots/recipes/perf.expected/cpu_scale_failed_once.json
+++ b/infra/bots/recipes/perf.expected/cpu_scale_failed_once.json
@@ -540,7 +540,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "NexusPlayer",
       "0.6"
@@ -566,6 +566,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -580,6 +581,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -605,11 +614,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",
@@ -625,7 +637,7 @@
     "cmd": [
       "python",
       "-u",
-      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
+      "\nimport os\nimport subprocess\nimport sys\nimport time\nADB = sys.argv[1]\nmodel = sys.argv[2]\ntarget_percent = float(sys.argv[3])\nlog = subprocess.check_output([ADB, 'root'])\n# check for message like 'adbd cannot run as root in production builds'\nprint log\nif 'cannot' in log:\n  raise Exception('adb root failed')\n\nif model == 'Nexus10':\n  # Nexus10 doesn't list available frequencies, but it does give a\n  # min and a max and seems to round to the nearest 100khz, so a\n  # subset of those available are here.\n  available_freqs = [200000, 400000, 600000, 800000, 1000000, 1200000,\n                     1400000, 1700000]\nelif model == 'Nexus7':\n  # Nexus7 claims to support 1300000, but only really allows 1200000\n  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,\n                     860000, 1000000, 1100000, 1200000]\nelse:\n  # Temporary logging to get a sense of what devices have multiple cpus\n  try:\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])\n    print subprocess.check_output([ADB, 'shell', 'cat ',\n        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])\n  except Exception as e:\n    print e.output.strip()\n  # Most devices give a list of their available frequencies.\n  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '\n      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])\n\n  # Check for message like '/system/bin/sh: file not found'\n  if available_freqs and '/system/bin/sh' not in available_freqs:\n    available_freqs = sorted(\n        int(i) for i in available_freqs.strip().split())\n  else:\n    raise Exception('Could not get list of available frequencies: %s' %\n                    available_freqs)\n\nmaxfreq = available_freqs[-1]\ntarget = int(round(maxfreq * target_percent))\nfreq = maxfreq\nfor f in reversed(available_freqs):\n  if f <= target:\n    freq = f\n    break\n\nprint 'Setting frequency to %d' % freq\n\nsubprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])\n# If scaling_max_freq is lower than our attempted setting, it won't take.\n# We must set min first, because if we try to set max to be less than min\n# (which sometimes happens after certain devices reboot) it returns a\n# perplexing permissions error.\nsubprocess.check_output([ADB, 'shell', 'echo 0 > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])\nsubprocess.check_output([ADB, 'shell', 'echo %d > '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])\ntime.sleep(5)\nactual_freq = subprocess.check_output([ADB, 'shell', 'cat '\n    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq']).strip()\nif actual_freq != str(freq):\n  raise Exception('(actual, expected) (%s, %d)'\n                  % (actual_freq, freq))\n",
       "/usr/bin/adb.1.0.35",
       "NexusPlayer",
       "0.6"
@@ -650,6 +662,7 @@
       "@@@STEP_LOG_LINE@python.inline@target_percent = float(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@log = subprocess.check_output([ADB, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# check for message like 'adbd cannot run as root in production builds'@@@",
+      "@@@STEP_LOG_LINE@python.inline@print log@@@",
       "@@@STEP_LOG_LINE@python.inline@if 'cannot' in log:@@@",
       "@@@STEP_LOG_LINE@python.inline@  raise Exception('adb root failed')@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -664,6 +677,14 @@
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = [51000, 102000, 204000, 340000, 475000, 640000, 760000,@@@",
       "@@@STEP_LOG_LINE@python.inline@                     860000, 1000000, 1100000, 1200000]@@@",
       "@@@STEP_LOG_LINE@python.inline@else:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  # Temporary logging to get a sense of what devices have multiple cpus@@@",
+      "@@@STEP_LOG_LINE@python.inline@  try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/affected_cpus'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print subprocess.check_output([ADB, 'shell', 'cat ',@@@",
+      "@@@STEP_LOG_LINE@python.inline@        '/sys/devices/system/cpu/cpu?/cpufreq/scaling_available_frequencies'])@@@",
+      "@@@STEP_LOG_LINE@python.inline@  except Exception as e:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print e.output.strip()@@@",
       "@@@STEP_LOG_LINE@python.inline@  # Most devices give a list of their available frequencies.@@@",
       "@@@STEP_LOG_LINE@python.inline@  available_freqs = subprocess.check_output([ADB, 'shell', 'cat '@@@",
       "@@@STEP_LOG_LINE@python.inline@      '/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'])@@@",
@@ -689,11 +710,14 @@
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo \"userspace\" > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor'])@@@",
       "@@@STEP_LOG_LINE@python.inline@# If scaling_max_freq is lower than our attempted setting, it won't take.@@@",
-      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
-      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@# We must set min first, because if we try to set max to be less than min@@@",
+      "@@@STEP_LOG_LINE@python.inline@# (which sometimes happens after certain devices reboot) it returns a@@@",
+      "@@@STEP_LOG_LINE@python.inline@# perplexing permissions error.@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo 0 > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq'])@@@",
       "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
+      "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq' % freq])@@@",
+      "@@@STEP_LOG_LINE@python.inline@subprocess.check_output([ADB, 'shell', 'echo %d > '@@@",
       "@@@STEP_LOG_LINE@python.inline@    '/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed' % freq])@@@",
       "@@@STEP_LOG_LINE@python.inline@time.sleep(5)@@@",
       "@@@STEP_LOG_LINE@python.inline@actual_freq = subprocess.check_output([ADB, 'shell', 'cat '@@@",