def start(self, test):
"""
Start ftrace profiler
:param test: Autotest test in which the profiler will operate on.
"""
# Make sure debugfs is mounted and tracing disabled.
utils.system('%s reset' % self.trace_cmd)
output_dir = os.path.join(test.profdir, 'ftrace')
if not os.path.isdir(output_dir):
os.makedirs(output_dir)
self.output = os.path.join(output_dir, 'trace.dat')
cmd = [self.trace_cmd, 'record', '-o', self.output]
cmd += self.trace_cmd_args
self.record_job = utils.BgJob(self.join_command(cmd),
stderr_tee=utils.TEE_TO_LOGS)
# Wait for tracing to be enabled. If trace-cmd dies before enabling
# tracing, then there was a problem.
tracing_on = os.path.join(self.tracing_dir, 'tracing_on')
while (self.record_job.sp.poll() is None and
utils.read_file(tracing_on).strip() != '1'):
time.sleep(0.1)
if self.record_job.sp.poll() is not None:
utils.join_bg_jobs([self.record_job])
raise error.CmdError(self.record_job.command,
self.record_job.sp.returncode,
'trace-cmd exited early.')
def get_jeos_info():
"""
Gets the correct asset and variant information depending on host OS.
"""
jeos_info = {'asset': 'jeos-19-64', 'variant': 'JeOS.19'}
issue_contents = utils.read_file('/etc/issue')
if 'Fedora' in issue_contents and '20' in issue_contents:
jeos_info = {'asset': 'jeos-20-64', 'variant': 'JeOS.20'}
return jeos_info
def get_jeos_info():
"""
Gets the correct asset and variant information depending on host OS.
"""
jeos_info = {'asset': 'jeos-19-64', 'variant': 'JeOS.19'}
issue_contents = utils.read_file('/etc/issue')
if 'Fedora' in issue_contents and '20' in issue_contents:
jeos_info = {'asset': 'jeos-20-64', 'variant': 'JeOS.20'}
return jeos_info
def gather_stats(self, results):
per_cpu = os.path.join(self.tracing_dir, 'per_cpu')
for cpu in os.listdir(per_cpu):
cpu_stats = os.path.join(per_cpu, cpu, 'stats')
for line in utils.read_file(cpu_stats).splitlines():
key, val = line.split(': ')
key = key.replace(' ', '_')
val = int(val)
cpu_key = '%s_%s' % (cpu, key)
total_key = 'total_' + key
results[cpu_key] = val
results[total_key] = (results.get(total_key, 0) +
results[cpu_key])
def get_default_guest_os_info():
"""
Gets the default asset and variant information depending on host OS
"""
os_info = {'asset': 'jeos-19-64', 'variant': DEFAULT_GUEST_OS}
from autotest.client import utils
issue_contents = utils.read_file('/etc/issue')
if 'Fedora' in issue_contents and '20' in issue_contents:
os_info = {'asset': 'jeos-20-64', 'variant': 'JeOS.20'}
return os_info
def get_default_guest_os_info():
"""
Gets the default asset and variant information depending on host OS
"""
os_info = {'asset': 'jeos-19-64', 'variant': DEFAULT_GUEST_OS}
from autotest.client import utils
issue_contents = utils.read_file('/etc/issue')
if 'Fedora' in issue_contents and '20' in issue_contents:
os_info = {'asset': 'jeos-20-64', 'variant': 'JeOS.20'}
return os_info
def gather_stats(self, results):
per_cpu = os.path.join(self.tracing_dir, 'per_cpu')
for cpu in os.listdir(per_cpu):
cpu_stats = os.path.join(per_cpu, cpu, 'stats')
for line in utils.read_file(cpu_stats).splitlines():
key, val = line.split(': ')
key = key.replace(' ', '_')
val = int(val)
cpu_key = '%s_%s' % (cpu, key)
total_key = 'total_' + key
results[cpu_key] = val
results[total_key] = (results.get(total_key, 0) +
results[cpu_key])
def initialize(self):
# Store the setting if the system has CPUQuiet feature
if os.path.exists(SYSFS_CPUQUIET_ENABLE):
self.is_cpuquiet_enabled = utils.read_file(SYSFS_CPUQUIET_ENABLE)
utils.write_one_line(SYSFS_CPUQUIET_ENABLE, '0')
