forked from mirrors/gecko-dev
7b53fcdbb6
MozReview-Commit-ID: BFaOv5i5Tun --HG-- extra : rebase_source : 5c2b5d1867eb5b48c56725b87d71dae72a83eb34
93 lines
2.7 KiB
HTML
93 lines
2.7 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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Bug 1068144 - Test getting the timestamps for allocations.
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-->
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<head>
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<meta charset="utf-8">
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<title>Memory monitoring actor test</title>
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<script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
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</head>
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<body>
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<pre id="test">
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<script src="memory-helpers.js" type="application/javascript"></script>
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<script>
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"use strict";
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window.onload = function () {
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SimpleTest.waitForExplicitFinish();
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Task.spawn(function* () {
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let { memory, client } = yield startServerAndGetSelectedTabMemory();
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yield memory.attach();
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let allocs = [];
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function allocator() {
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allocs.push(new Object());
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}
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// Using setTimeout results in wildly varying delays that make it hard to
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// test our timestamps and results in intermittent failures. Instead, we
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// actually spin an empty loop for a whole millisecond.
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function actuallyWaitOneWholeMillisecond() {
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let start = window.performance.now();
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// eslint-disable-next-line curly
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while (window.performance.now() - start < 1.000);
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}
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yield memory.startRecordingAllocations();
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allocator();
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actuallyWaitOneWholeMillisecond();
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allocator();
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actuallyWaitOneWholeMillisecond();
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allocator();
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let response = yield memory.getAllocations();
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yield memory.stopRecordingAllocations();
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ok(response.allocationsTimestamps, "The response should have timestamps.");
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is(response.allocationsTimestamps.length, response.allocations.length,
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"There should be a timestamp for every allocation.");
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let allocatorIndices = response.allocations
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.map(function (a, idx) {
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let frame = response.frames[a];
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if (frame && frame.functionDisplayName === "allocator") {
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return idx;
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}
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return null;
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})
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.filter(function (idx) {
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return idx !== null;
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});
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is(allocatorIndices.length, 3,
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"Should have our 3 allocations from the `allocator` timeouts.");
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let lastTimestamp;
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for (let i = 0; i < 3; i++) {
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let timestamp = response.allocationsTimestamps[allocatorIndices[i]];
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info("timestamp", timestamp);
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ok(timestamp, "We should have a timestamp for the `allocator` allocation.");
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if (lastTimestamp) {
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let delta = timestamp - lastTimestamp;
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info("delta since last timestamp", delta);
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// ms
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ok(delta >= 1,
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"The timestamp should be about 1 ms after the last timestamp.");
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}
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lastTimestamp = timestamp;
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}
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yield memory.detach();
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destroyServerAndFinish(client);
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});
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};
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</script>
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</pre>
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</body>
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</html>
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