1 # Copyright (c) 2010 The Chromium OS 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 6 import logging, random, os 7 from autotest_lib.client.bin import test, utils 8 from autotest_lib.client.common_lib import error 9 10 SUSPEND_START = '/tmp/power_state_cycle_begin' 11 SUSPEND_END = '/tmp/power_state_cycle_end' 12 CRYPTOHOMESTRESS_START = '/tmp/cryptohomestress_begin' 13 CRYPTOHOMESTRESS_END = '/tmp/cryptohomestress_end' 14 15 class platform_CryptohomeStress(test.test): 16 """This is a stress test of the file system in Chromium OS. 17 While performing the test, we will cycle through power 18 states, and interrupt disk activity. 19 """ 20 version = 1 21 22 def initialize(self): 23 for signal_file in [SUSPEND_END]: 24 if os.path.exists(signal_file): 25 logging.warning('removing existing stop file %s', signal_file) 26 os.unlink(signal_file) 27 self.d_ratio = utils.system_output('cat /proc/sys/vm/dirty_ratio') 28 utils.system('echo 1 > /proc/sys/vm/dirty_ratio') 29 random.seed() # System time is fine. 30 31 32 def run_once(self, runtime=300): 33 # check that fio has started, waiting for up to TIMEOUT 34 utils.poll_for_condition( 35 lambda: os.path.exists(CRYPTOHOMESTRESS_START), 36 error.TestFail('fiostress not triggered.'), 37 timeout=30, sleep_interval=1) 38 open(SUSPEND_START, 'w').close() 39 # Pad disk stress runtime for safety. 40 runtime = runtime*3 41 utils.poll_for_condition( 42 lambda: os.path.exists(CRYPTOHOMESTRESS_END), 43 error.TestFail('fiostress runtime exceeded.'), 44 timeout=runtime, sleep_interval=10) 45 46 47 def cleanup(self): 48 open(SUSPEND_END, 'w').close() 49 command = 'echo %s > /proc/sys/vm/dirty_ratio' % self.d_ratio 50 utils.system(command) 51 52
