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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
from mozdevice import ADBError
def tune_performance(device, log=None, timeout=None):
"""Set various performance-oriented parameters, to reduce jitter.
This includes some device-specific kernel tweaks.
"""
PerformanceTuner(device, log=log, timeout=timeout).tune_performance()
class PerformanceTuner(object):
def __init__(self, device, log=None, timeout=None):
self.device = device
self.log = log or self.device._logger
self.timeout = timeout
def tune_performance(self):
self.log.info("tuning android device performance")
self.set_svc_power_stayon()
if self.device.is_rooted:
device_name = self.device.shell_output(
"getprop ro.product.model", timeout=self.timeout
)
# all commands require root shell from here on
self.set_scheduler()
self.set_virtual_memory_parameters()
self.turn_off_services()
self.set_cpu_performance_parameters(device_name)
self.set_gpu_performance_parameters(device_name)
self.set_kernel_performance_parameters()
self.device.clear_logcat(timeout=self.timeout)
self.log.info("android device performance tuning complete")
def _set_value_and_check_exitcode(self, file_name, value):
self.log.info("setting {} to {}".format(file_name, value))
try:
self.device.shell_output(
" ".join(["echo", str(value), ">", str(file_name)]),
timeout=self.timeout,
)
self.log.info("successfully set {} to {}".format(file_name, value))
except ADBError as e:
self.log.info(
"Ignoring failure to set value {} to {}. {}".format(file_name, value, e)
)
def set_svc_power_stayon(self):
self.log.info("set device to stay awake on usb")
self.device.shell_bool("svc power stayon usb", timeout=self.timeout)
def set_scheduler(self):
self.log.info("setting scheduler to noop")
scheduler_location = "/sys/block/sda/queue/scheduler"
self._set_value_and_check_exitcode(scheduler_location, "noop")
def turn_off_services(self):
services = [
"mpdecision",
"thermal-engine",
"thermald",
]
for service in services:
try:
self.log.info(" ".join(["turning off service:", service]))
self.device.shell_bool(
" ".join(["stop", service]), timeout=self.timeout
)
except ADBError as e:
self.log.info(
"Ignoring failure to stop service {}. Error: {}: {}".format(
service, e.__class__.__name__, e
)
)
services_list_output = self.device.shell_output(
"service list", timeout=self.timeout
)
for service in services:
if service not in services_list_output:
self.log.info(" ".join(["successfully terminated:", service]))
else:
self.log.warning(" ".join(["failed to terminate:", service]))
def disable_animations(self):
self.log.info("disabling animations")
commands = {
"animator_duration_scale": 0.0,
"transition_animation_scale": 0.0,
"window_animation_scale": 0.0,
}
for key, value in commands.items():
command = " ".join(["settings", "put", "global", key, str(value)])
self.log.info("setting {} to {}".format(key, value))
self.device.shell_bool(command, timeout=self.timeout)
def restore_animations(self):
# animation settings are not restored to default by reboot
self.log.info("restoring animations")
commands = {
"animator_duration_scale": 1.0,
"transition_animation_scale": 1.0,
"window_animation_scale": 1.0,
}
for key, value in commands.items():
command = " ".join(["settings", "put", "global", key, str(value)])
self.device.shell_bool(command, timeout=self.timeout)
def set_virtual_memory_parameters(self):
self.log.info("setting virtual memory parameters")
commands = {
"/proc/sys/vm/swappiness": 0,
"/proc/sys/vm/dirty_ratio": 85,
"/proc/sys/vm/dirty_background_ratio": 70,
}
for key, value in commands.items():
self._set_value_and_check_exitcode(key, value)
def set_cpu_performance_parameters(self, device_name=None):
self.log.info("setting cpu performance parameters")
commands = {}
if not device_name:
device_name = self.device.shell_output(
"getprop ro.product.model", timeout=self.timeout
)
if device_name == "SM-A515F":
commands.update(
{
"/sys/devices/system/cpu/cpufreq/policy0/scaling_governor": "performance",
"/sys/devices/system/cpu/cpufreq/policy4/scaling_governor": "performance",
"/sys/devices/system/cpu/cpufreq/policy0/scaling_min_freq": "1742000",
"/sys/devices/system/cpu/cpufreq/policy4/scaling_min_freq": "2314000",
}
)
else:
self.log.info(
"CPU for device with ro.product.model '{}' unknown, not scaling_governor".format(
device_name
)
)
for key, value in commands.items():
self._set_value_and_check_exitcode(key, value)
def set_gpu_performance_parameters(self, device_name=None):
self.log.info("setting gpu performance parameters")
commands = {
"/sys/class/kgsl/kgsl-3d0/bus_split": "0",
"/sys/class/kgsl/kgsl-3d0/force_bus_on": "1",
"/sys/class/kgsl/kgsl-3d0/force_rail_on": "1",
"/sys/class/kgsl/kgsl-3d0/force_clk_on": "1",
"/sys/class/kgsl/kgsl-3d0/force_no_nap": "1",
"/sys/class/kgsl/kgsl-3d0/idle_timer": "1000000",
}
if not device_name:
device_name = self.device.shell_output(
"getprop ro.product.model", timeout=self.timeout
)
self.log.info(
"GPU for device with ro.product.model '{}' unknown, not setting devfreq".format(
device_name
)
)
for key, value in commands.items():
self._set_value_and_check_exitcode(key, value)
def set_kernel_performance_parameters(self):
self.log.info("setting kernel performance parameters")
commands = {
"/sys/kernel/debug/msm-bus-dbg/shell-client/update_request": "1",
"/sys/kernel/debug/msm-bus-dbg/shell-client/mas": "1",
"/sys/kernel/debug/msm-bus-dbg/shell-client/ab": "0",
"/sys/kernel/debug/msm-bus-dbg/shell-client/slv": "512",
}
for key, value in commands.items():
self._set_value_and_check_exitcode(key, value)