| # Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """ |
| This is a profiler class for the perf profiler in ChromeOS. It differs from |
| the existing perf profiler in autotset by directly substituting the options |
| passed to the initialize function into the "perf record" command line. It also |
| does not produce a perf report on the client (where there are no debug |
| symbols) but instead copies the perf.data file back to the server for |
| analysis. |
| """ |
| |
| import os, signal, subprocess |
| from autotest_lib.client.bin import profiler, os_dep |
| from autotest_lib.client.common_lib import error |
| |
| |
| class cros_perf(profiler.profiler): |
| version = 1 |
| |
| def initialize(self, options='-e cycles'): |
| self.options = options |
| self.perf_bin = os_dep.command('perf') |
| |
| |
| def start(self, test): |
| self.logfile = os.path.join(test.profdir, 'perf.data') |
| cmd = ('exec %s record -a -o %s %s' % |
| (self.perf_bin, self.logfile, self.options)) |
| |
| self._process = subprocess.Popen(cmd, shell=True, |
| stderr=subprocess.STDOUT) |
| |
| |
| def stop(self, test): |
| ret_code = self._process.poll() |
| if ret_code is not None: |
| raise error.AutotestError('perf terminated early with return code: ' |
| '%d. Please check your logs.' % ret_code) |
| |
| self._process.send_signal(signal.SIGINT) |
| self._process.wait() |
| |
