blob: 378dae7b45d771db6dd1d2e71aaa948fc74288f5 [file] [log] [blame]
# Copyright (c) 2010 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.
import logging, random, os
from autotest_lib.client.bin import test, utils
from autotest_lib.client.common_lib import error
SUSPEND_START = '/tmp/power_state_cycle_begin'
SUSPEND_END = '/tmp/power_state_cycle_end'
CRYPTOHOMESTRESS_START = '/tmp/cryptohomestress_begin'
CRYPTOHOMESTRESS_END = '/tmp/cryptohomestress_end'
class platform_CryptohomeStress(test.test):
"""This is a stress test of the file system in Chromium OS.
While performing the test, we will cycle through power
states, and interrupt disk activity.
version = 1
def initialize(self):
for signal_file in [SUSPEND_END]:
if os.path.exists(signal_file):
logging.warning('removing existing stop file %s', signal_file)
self.d_ratio = utils.system_output('cat /proc/sys/vm/dirty_ratio')
utils.system('echo 1 > /proc/sys/vm/dirty_ratio')
random.seed() # System time is fine.
def run_once(self, runtime=300):
# check that fio has started, waiting for up to TIMEOUT
lambda: os.path.exists(CRYPTOHOMESTRESS_START),
error.TestFail('fiostress not triggered.'),
timeout=30, sleep_interval=1)
open(SUSPEND_START, 'w').close()
# Pad disk stress runtime for safety.
runtime = runtime*3
lambda: os.path.exists(CRYPTOHOMESTRESS_END),
error.TestFail('fiostress runtime exceeded.'),
timeout=runtime, sleep_interval=10)
def cleanup(self):
open(SUSPEND_END, 'w').close()
command = 'echo %s > /proc/sys/vm/dirty_ratio' % self.d_ratio