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<!DOCTYPE HTML>
<html>
<!--
Bug 1068144 - Test getting the timestamps for allocations.
-->
<head>
<meta charset="utf-8">
<title>Memory monitoring actor test</title>
<script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
</head>
<body>
<pre id="test">
<script src="memory-helpers.js" type="application/javascript;version=1.8"></script>
<script>
window.onload = function() {
SimpleTest.waitForExplicitFinish();
Task.spawn(function* () {
var { memory, client } = yield startServerAndGetSelectedTabMemory();
yield memory.attach();
var allocs = [];
function allocator() {
allocs.push(new Object);
}
// Using setTimeout results in wildly varying delays that make it hard to
// test our timestamps and results in intermittent failures. Instead, we
// actually spin an empty loop for a whole millisecond.
function actuallyWaitOneWholeMillisecond() {
var start = window.performance.now();
while (window.performance.now() - start < 1.000) ;
}
yield memory.startRecordingAllocations();
allocator();
actuallyWaitOneWholeMillisecond();
allocator();
actuallyWaitOneWholeMillisecond();
allocator();
var response = yield memory.getAllocations();
yield memory.stopRecordingAllocations();
ok(response.allocationsTimestamps, "The response should have timestamps.");
is(response.allocationsTimestamps.length, response.allocations.length,
"There should be a timestamp for every allocation.");
var allocatorIndices = response.allocations
.map(function (a, idx) {
var frame = response.frames[a];
if (frame && frame.functionDisplayName === "allocator") {
return idx;
}
})
.filter(function (idx) {
return idx !== undefined;
});
is(allocatorIndices.length, 3, "Should have our 3 allocations from the `allocator` timeouts.");
var lastTimestamp;
for (var i = 0; i < 3; i++) {
var timestamp = response.allocationsTimestamps[allocatorIndices[i]];
info("timestamp", timestamp);
ok(timestamp, "We should have a timestamp for the `allocator` allocation.");
if (lastTimestamp) {
var delta = timestamp - lastTimestamp;
info("delta since last timestamp", delta);
// If we're unlucky, we might have rounded down to 0ms
// ok(delta >= 1 /* ms */,
// "The timestamp should be about 1 ms after the last timestamp.");
}
lastTimestamp = timestamp;
}
yield memory.detach();
destroyServerAndFinish(client);
});
};
</script>
</pre>
</body>
</html>
|
