41 lines
1.2 KiB
Python
41 lines
1.2 KiB
Python
"""
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What's eating the battery life of my laptop? Why isn't it many more
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hours? Which software component causes the most power to be burned?
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These are important questions without a good answer... until now.
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"""
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import time, os
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from autotest_lib.client.bin import utils, profiler
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class powertop(profiler.profiler):
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version = 1
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preserve_srcdir = True
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# filenames: list of filenames to cat
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def setup(self, *args, **dargs):
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os.chdir(self.srcdir)
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utils.make()
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def start(self, test):
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self.child_pid = os.fork()
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if self.child_pid: # parent
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return None
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else: # child
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powertop = os.path.join(self.srcdir, 'powertop') + ' -d'
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outputfile = os.path.join(test.profdir, 'powertop')
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while True:
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output = open(outputfile, 'a')
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output.write(time.asctime() + '\n')
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data = utils.system_output('%s >> %s' % (powertop, outputfile))
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output.write(data)
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output.write('\n=========================\n')
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output.close()
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def stop(self, test):
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os.kill(self.child_pid, 15)
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def report(self, test):
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return None
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