test_watchdog_hibernate.js (2710B)
1 /* This Source Code Form is subject to the terms of the Mozilla Public 2 * License, v. 2.0. If a copy of the MPL was not distributed with this 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5 async function testBody() { 6 7 setWatchdogEnabled(true); 8 9 // It's unlikely that we've ever hibernated at this point, but the timestamps 10 // default to 0, so this should always be true. 11 var now = Date.now() * 1000; 12 var startHibernation = Cu.getWatchdogTimestamp("WatchdogHibernateStart"); 13 var stopHibernation = Cu.getWatchdogTimestamp("WatchdogHibernateStop"); 14 do_log_info("Pre-hibernation statistics:"); 15 do_log_info("now: " + now / 1000000); 16 do_log_info("startHibernation: " + startHibernation / 1000000); 17 do_log_info("stopHibernation: " + stopHibernation / 1000000); 18 Assert.less(startHibernation, now, "startHibernation ok"); 19 Assert.less(stopHibernation, now, "stopHibernation ok"); 20 21 // When the watchdog runs, it hibernates if there's been no activity for the 22 // last 2 seconds, otherwise it sleeps for 1 second. As such, given perfect 23 // scheduling, we should never have more than 3 seconds of inactivity without 24 // hibernating. To add some padding for automation, we mandate that hibernation 25 // must begin between 2 and 5 seconds from now. 26 27 // Sleep for 10 seconds. Note: we don't use nsITimer here because then we may run 28 // arbitrary (idle) events involving script before it fires. 29 simulateNoScriptActivity(10); 30 31 busyWait(1000); // Give the watchdog time to wake up on the condvar. 32 var stateChange = Cu.getWatchdogTimestamp("ContextStateChange"); 33 startHibernation = Cu.getWatchdogTimestamp("WatchdogHibernateStart"); 34 stopHibernation = Cu.getWatchdogTimestamp("WatchdogHibernateStop"); 35 do_log_info("Post-hibernation statistics:"); 36 do_log_info("stateChange: " + stateChange / 1000000); 37 do_log_info("startHibernation: " + startHibernation / 1000000); 38 do_log_info("stopHibernation: " + stopHibernation / 1000000); 39 // XPCOM timers, JS times, and PR_Now() are apparently not directly 40 // comparable, as evidenced by certain seemingly-impossible timing values 41 // that occasionally get logged in windows automation. We're really just 42 // making sure this behavior is roughly as expected on the macro scale, 43 // so we add a 1 second fuzz factor here. 44 const FUZZ_FACTOR = 1 * 1000 * 1000; 45 Assert.greater(stateChange, now + 10*1000*1000 - FUZZ_FACTOR, "stateChange ok"); 46 Assert.greater(startHibernation, now + 2*1000*1000 - FUZZ_FACTOR, "startHibernation ok"); 47 Assert.less(startHibernation, now + 5*1000*1000 + FUZZ_FACTOR, "startHibernation ok"); 48 Assert.greater(stopHibernation, now + 10*1000*1000 - FUZZ_FACTOR, "stopHibernation ok"); 49 }