sdk/platform-tools/systrace/catapult/telemetry/telemetry/internal/platform/linux_platform_backend.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 import logging
   6 import os
   7 import platform
   8 import subprocess
   9 import sys
  10
  11 from py_utils import cloud_storage  # pylint: disable=import-error
  12
  13 from telemetry.internal.util import binary_manager
  14 from telemetry.core import os_version
  15 from telemetry.core import util
  16 from telemetry import decorators
  17 from telemetry.internal.platform import linux_based_platform_backend
  18 from telemetry.internal.platform import posix_platform_backend
  19 from telemetry.internal.platform.power_monitor import msr_power_monitor
  20
  21
  22 _POSSIBLE_PERFHOST_APPLICATIONS = [
  23   'perfhost_precise',
  24   'perfhost_trusty',
  25 ]
  26
  27
  28 class LinuxPlatformBackend(
  29     posix_platform_backend.PosixPlatformBackend,
  30     linux_based_platform_backend.LinuxBasedPlatformBackend):
  31   def __init__(self):
  32     super(LinuxPlatformBackend, self).__init__()
  33     self._power_monitor = msr_power_monitor.MsrPowerMonitorLinux(self)
  34
  35   @classmethod
  36   def IsPlatformBackendForHost(cls):
  37     return sys.platform.startswith('linux') and not util.IsRunningOnCrosDevice()
  38
  39   def IsThermallyThrottled(self):
  40     raise NotImplementedError()
  41
  42   def HasBeenThermallyThrottled(self):
  43     raise NotImplementedError()
  44
  45   @decorators.Cache
  46   def GetArchName(self):
  47     return platform.machine()
  48
  49   def GetOSName(self):
  50     return 'linux'
  51
  52   @decorators.Cache
  53   def GetOSVersionName(self):
  54     if not os.path.exists('/etc/lsb-release'):
  55       raise NotImplementedError('Unknown Linux OS version')
  56
  57     codename = None
  58     version = None
  59     for line in self.GetFileContents('/etc/lsb-release').splitlines():
  60       key, _, value = line.partition('=')
  61       if key == 'DISTRIB_CODENAME':
  62         codename = value.strip()
  63       elif key == 'DISTRIB_RELEASE':
  64         try:
  65           version = float(value)
  66         except ValueError:
  67           version = 0
  68       if codename and version:
  69         break
  70     return os_version.OSVersion(codename, version)
  71
  72   def CanFlushIndividualFilesFromSystemCache(self):
  73     return True
  74
  75   def SupportFlushEntireSystemCache(self):
  76     return self.HasRootAccess()
  77
  78   def FlushEntireSystemCache(self):
  79     p = subprocess.Popen(['/sbin/sysctl', '-w', 'vm.drop_caches=3'])
  80     p.wait()
  81     assert p.returncode == 0, 'Failed to flush system cache'
  82
  83   def CanLaunchApplication(self, application):
  84     if application == 'ipfw' and not self._IsIpfwKernelModuleInstalled():
  85       return False
  86     return super(LinuxPlatformBackend, self).CanLaunchApplication(application)
  87
  88   def InstallApplication(self, application):
  89     if application == 'ipfw':
  90       self._InstallIpfw()
  91     elif application == 'avconv':
  92       self._InstallBinary(application)
  93     elif application in _POSSIBLE_PERFHOST_APPLICATIONS:
  94       self._InstallBinary(application)
  95     else:
  96       raise NotImplementedError(
  97           'Please teach Telemetry how to install ' + application)
  98
  99   def CanMonitorPower(self):
 100     return self._power_monitor.CanMonitorPower()
 101
 102   def CanMeasurePerApplicationPower(self):
 103     return self._power_monitor.CanMeasurePerApplicationPower()
 104
 105   def StartMonitoringPower(self, browser):
 106     self._power_monitor.StartMonitoringPower(browser)
 107
 108   def StopMonitoringPower(self):
 109     return self._power_monitor.StopMonitoringPower()
 110
 111   def ReadMsr(self, msr_number, start=0, length=64):
 112     cmd = ['rdmsr', '-d', str(msr_number)]
 113     (out, err) = subprocess.Popen(cmd,
 114                                   stdout=subprocess.PIPE,
 115                                   stderr=subprocess.PIPE).communicate()
 116     if err:
 117       raise OSError(err)
 118     try:
 119       result = int(out)
 120     except ValueError:
 121       raise OSError('Cannot interpret rdmsr output: %s' % out)
 122     return result >> start & ((1 << length) - 1)
 123
 124   def _IsIpfwKernelModuleInstalled(self):
 125     return 'ipfw_mod' in subprocess.Popen(
 126         ['lsmod'], stdout=subprocess.PIPE).communicate()[0]
 127
 128   def _InstallIpfw(self):
 129     ipfw_bin = binary_manager.FindPath(
 130         'ipfw', self.GetArchName(), self.GetOSName())
 131     ipfw_mod = binary_manager.FindPath(
 132         'ipfw_mod.ko', self.GetArchName(), self.GetOSName())
 133
 134     try:
 135       changed = cloud_storage.GetIfChanged(
 136           ipfw_bin, cloud_storage.INTERNAL_BUCKET)
 137       changed |= cloud_storage.GetIfChanged(
 138           ipfw_mod, cloud_storage.INTERNAL_BUCKET)
 139     except cloud_storage.CloudStorageError, e:
 140       logging.error(str(e))
 141       logging.error('You may proceed by manually building and installing'
 142                     'dummynet for your kernel. See: '
 143                     'http://info.iet.unipi.it/~luigi/dummynet/')
 144       sys.exit(1)
 145
 146     if changed or not self.CanLaunchApplication('ipfw'):
 147       if not self._IsIpfwKernelModuleInstalled():
 148         subprocess.check_call(['/usr/bin/sudo', 'insmod', ipfw_mod])
 149       os.chmod(ipfw_bin, 0755)
 150       subprocess.check_call(
 151           ['/usr/bin/sudo', 'cp', ipfw_bin, '/usr/local/sbin'])
 152
 153     assert self.CanLaunchApplication('ipfw'), 'Failed to install ipfw. ' \
 154         'ipfw provided binaries are not supported for linux kernel < 3.13. ' \
 155         'You may proceed by manually building and installing dummynet for ' \
 156         'your kernel. See: http://info.iet.unipi.it/~luigi/dummynet/'
 157
 158   def _InstallBinary(self, bin_name):
 159     bin_path = binary_manager.FetchPath(
 160         bin_name, self.GetArchName(), self.GetOSName())
 161     os.environ['PATH'] += os.pathsep + os.path.dirname(bin_path)
 162     assert self.CanLaunchApplication(bin_name), 'Failed to install ' + bin_name