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