Basis for cryptohome+power_SuspendResume stress test.

client/site_tests/platform_CryptohomeStress/platform_CryptohomeStress.py

+# 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 os, random, subprocess, time
+import commands, logging, random, time, utils
+from autotest_lib.client.bin import site_utils, test
+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):
+    version = 1
+    def initialize(self):
+        for signal_file in [SUSPEND_END, CRYPTOHOMESTRESS_END]:
+            if os.path.exists(signal_file):
+                logging.warning('removing existing stop file %s' % signal_file)
+                os.unlink(signal_file)
+    random.seed() # System time is fine.
+
+
+    def run_once(self, runtime=300):
+        # check that fio has started, waiting for up to TIMEOUT
+        site_utils.poll_for_condition(
+            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 by 60s for safety.
+        runtime = runtime + 60
+        site_utils.poll_for_condition(
+            lambda: os.path.exists(CRYPTOHOMESTRESS_END),
+            error.TestFail('fiostress runtime exceeded.'),
+            timeout=runtime, sleep_interval=10)
+
+    def cleanup(self):
+        open(SUSPEND_END, 'w').close()
+