The goal of this experiment is to run benchmarks on a Nexus N5X running Android with an EAS kernel and collect results. The analysis phase will consist in comparing EAS with other schedulers, that is comparing sched governor with:
- interactive
- performance
- powersave
- ondemand
The benchmark we will be using is PCMark (https://www.futuremark.com/benchmarks/pcmark-android). You will need to manually install the app on the Android device in order to run this Notebook.
When opinening PCMark for the first time you will need to Install the work benchmark from inside the app.
In [1]:
import logging
reload(logging)
log_fmt = '%(asctime)-9s %(levelname)-8s: %(message)s'
logging.basicConfig(format=log_fmt)
# Change to info once the notebook runs ok
logging.getLogger().setLevel(logging.INFO)
In [2]:
%pylab inline
import copy
import os
from time import sleep
from subprocess import Popen
import pandas as pd
# Support to access the remote target
import devlib
from env import TestEnv
# Support for trace events analysis
from trace import Trace
# Suport for FTrace events parsing and visualization
import trappy
In case more than one Android device are conencted to the host, you must specify the ID of the device you want to target in my_target_conf. Run adb devices on your host to get the ID.
In [3]:
# Setup a target configuration
my_target_conf = {
# Target platform and board
"platform" : 'android',
# Add target support
"board" : 'n5x',
# Device ID
#"device" : "00b1346f0878ccb1",
# Define devlib modules to load
"modules" : [
'cpufreq' # enable CPUFreq support
],
}
In [4]:
my_tests_conf = {
# Folder where all the results will be collected
"results_dir" : "Android_PCMark",
# Platform configurations to test
"confs" : [
{
"tag" : "pcmark",
"flags" : "ftrace", # Enable FTrace events
"sched_features" : "ENERGY_AWARE", # enable EAS
},
],
}
In [5]:
# Initialize a test environment using:
# the provided target configuration (my_target_conf)
# the provided test configuration (my_test_conf)
te = TestEnv(target_conf=my_target_conf, test_conf=my_tests_conf)
target = te.target
This set of support functions will help us running the benchmark using different CPUFreq governors.
In [6]:
def set_performance():
target.cpufreq.set_all_governors('performance')
def set_powersave():
target.cpufreq.set_all_governors('powersave')
def set_interactive():
target.cpufreq.set_all_governors('interactive')
def set_sched():
target.cpufreq.set_all_governors('sched')
def set_ondemand():
target.cpufreq.set_all_governors('ondemand')
for cpu in target.list_online_cpus():
tunables = target.cpufreq.get_governor_tunables(cpu)
target.cpufreq.set_governor_tunables(
cpu,
'ondemand',
**{'sampling_rate' : tunables['sampling_rate_min']}
)
In [7]:
# CPUFreq configurations to test
confs = {
'performance' : {
'label' : 'prf',
'set' : set_performance,
},
#'powersave' : {
# 'label' : 'pws',
# 'set' : set_powersave,
#},
'interactive' : {
'label' : 'int',
'set' : set_interactive,
},
#'sched' : {
# 'label' : 'sch',
# 'set' : set_sched,
#},
#'ondemand' : {
# 'label' : 'odm',
# 'set' : set_ondemand,
#}
}
# The set of results for each comparison test
results = {}
In [8]:
def check_packages(pkgname):
try:
output = target.execute('pm list packages -f | grep -i {}'.format(pkgname))
except Exception:
raise RuntimeError('Package: [{}] not availabe on target'.format(pkgname))
# Check for specified PKG name being available on target
check_packages('com.futuremark.pcmark.android.benchmark')
In [9]:
def pcmark_run(exp_dir):
# Unlock device screen (assume no password required)
target.execute('input keyevent 82')
# Start PCMark on the target device
target.execute('monkey -p com.futuremark.pcmark.android.benchmark -c android.intent.category.LAUNCHER 1')
# Wait few seconds to make sure the app is loaded
sleep(5)
# Flush entire log
target.clear_logcat()
# Run performance workload (assume screen is vertical)
target.execute('input tap 750 1450')
# Wait for completion (7 minutes in total) and collect log
log_file = os.path.join(exp_dir, 'log.txt')
# Wait 5 minutes
sleep(300)
# Start collecting the log
with open(log_file, 'w') as log:
logcat = Popen(['adb logcat', 'com.futuremark.pcmandroid.VirtualMachineState:*', '*:S'],
stdout=log,
shell=True)
# Wait additional two minutes for benchmark to complete
sleep(120)
# Terminate logcat
logcat.kill()
# Get scores from logcat
score_file = os.path.join(exp_dir, 'score.txt')
os.popen('grep -o "PCMA_.*_SCORE .*" {} | sed "s/ = / /g" | sort -u > {}'.format(log_file, score_file))
# Close application
target.execute('am force-stop com.futuremark.pcmark.android.benchmark')
return score_file
In [10]:
def experiment(governor, exp_dir):
os.system('mkdir -p {}'.format(exp_dir));
logging.info('------------------------')
logging.info('Run workload using %s governor', governor)
confs[governor]['set']()
### Run the benchmark ###
score_file = pcmark_run(exp_dir)
# Save the score as a dictionary
scores = dict()
with open(score_file, 'r') as f:
lines = f.readlines()
for l in lines:
info = l.split()
scores.update({info[0] : float(info[1])})
# return all the experiment data
return {
'dir' : exp_dir,
'scores' : scores,
}
In [11]:
# Run the benchmark in all the configured governors
for governor in confs:
test_dir = os.path.join(te.res_dir, governor)
res = experiment(governor, test_dir)
results[governor] = copy.deepcopy(res)
After running the benchmark for the specified governors we can show the scores
In [12]:
# Create results DataFrame
data = {}
for governor in confs:
data[governor] = {}
for score_name, score in results[governor]['scores'].iteritems():
data[governor][score_name] = score
df = pd.DataFrame.from_dict(data)
df
Out[12]:
In [13]:
df.plot(kind='bar', rot=45, figsize=(16,8),
title='PCMark scores vs SchedFreq governors');