Add Pixel C knobs to skpbench

tools/skpbench/_hardware_pixel_c.py

Index: tools/skpbench/_hardware_pixel_c.py
diff --git a/tools/skpbench/_hardware_pixel_c.py b/tools/skpbench/_hardware_pixel_c.py
new file mode 100644
index 0000000000000000000000000000000000000000..3ea74c1c03ea651c7c5ab9b2e026141fba38ac49
--- /dev/null
+++ b/tools/skpbench/_hardware_pixel_c.py
@@ -0,0 +1,94 @@
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from _hardware import HardwareException, Expectation
+from _hardware_android import HardwareAndroid
+
+CPU_CLOCK_RATE = 1836000
+GPU_EMC_PROFILE = '0c: core 921 MHz emc 1600 MHz a A d D *'
+GPU_EMC_PROFILE_ID = '0c'
+
+class HardwarePixelC(HardwareAndroid):
+  def __init__(self, adb):
+    HardwareAndroid.__init__(self, adb)
+
+  def __enter__(self):
+    self._lock_clocks()
+    return HardwareAndroid.__enter__(self)
+
+  def __exit__(self, exception_type, exception_value, exception_traceback):
+    HardwareAndroid.__exit__(self, exception_type,
+                             exception_value, exception_traceback)
+    self._unlock_clocks()
+
+  def _lock_clocks(self):
+    if not self._is_root:
+      return
+
+    # lock cpu clocks.
+    self._adb.shell('''\
+      for N in $(seq 0 3); do
+        echo userspace > /sys/devices/system/cpu/cpu$N/cpufreq/scaling_governor
+        echo %i > /sys/devices/system/cpu/cpu$N/cpufreq/scaling_setspeed
+      done''' % CPU_CLOCK_RATE)
+
+    # lock gpu/emc clocks.
+    self._adb.shell('''\
+      chown root:root /sys/devices/57000000.gpu/pstate
+      echo %s > /sys/devices/57000000.gpu/pstate''' % GPU_EMC_PROFILE_ID)
+
+  def _unlock_clocks(self):
+    if not self._is_root:
+      return
+
+    # unlock gpu/emc clocks.
+    self._adb.shell('''\
+      echo auto > /sys/devices/57000000.gpu/pstate
+      chown system:system /sys/devices/57000000.gpu/pstate''')
+
+    # unlock cpu clocks.
+    self._adb.shell('''\
+      for N in $(seq 0 3); do
+        echo 0 > /sys/devices/system/cpu/cpu$N/cpufreq/scaling_setspeed
+        echo interactive > /sys/devices/system/cpu/cpu$N/cpufreq/scaling_governor
+      done''')
+
+  def sanity_check(self):
+    HardwareAndroid.sanity_check(self)
+
+    if not self._is_root:
+      return
+
+    # only issue one shell command in an attempt to minimize interference.
+    result = self._adb.check_lines('''\
+      cat /sys/class/power_supply/bq27742-0/capacity \
+          /sys/class/thermal/thermal_zone7/temp \
+          /sys/class/thermal/thermal_zone0/temp \
+          /sys/class/thermal/thermal_zone1/temp \
+          /sys/class/thermal/thermal_zone7/cdev1/cur_state \
+          /sys/class/thermal/thermal_zone7/cdev0/cur_state
+      for N in $(seq 0 3); do
+        cat /sys/devices/system/cpu/cpu$N/cpufreq/scaling_cur_freq
+      done
+      cat /sys/devices/57000000.gpu/pstate | grep \*$''')
+
+    expectations = \
+      [Expectation(int, min_value=30, name='battery', sleeptime=30*60),
+       Expectation(int, max_value=40000, name='skin temperature'),
+       Expectation(int, max_value=86000, name='cpu temperature'),
+       Expectation(int, max_value=87000, name='gpu temperature'),
+       Expectation(int, exact_value=0, name='cpu throttle'),
+       Expectation(int, exact_value=0, name='gpu throttle')] + \
+      [Expectation(int, exact_value=CPU_CLOCK_RATE,
+                   name='cpu_%i clock rate' % i, sleeptime=30)
+       for i in range(4)] + \
+      [Expectation(str, exact_value=GPU_EMC_PROFILE, name='gpu/emc profile')]
+
+    Expectation.check_all(expectations, result)
+
+  def sleep(self, sleeptime):
+    self._unlock_clocks()
+    HardwareAndroid.sleep(self, sleeptime)
+    self._lock_clocks()