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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
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+<!DOCTYPE HTML>
+<html>
+<!--
+Bug 1068171 - Test controlling the memory actor's allocation sampling probability.
+-->
+<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() {
+ for (var i = 0; i < 100; i++) {
+ allocs.push({});
+ }
+ }
+
+ var testProbability = Task.async(function* (p, expected) {
+ info("probability = " + p);
+ yield memory.startRecordingAllocations({
+ probability: p
+ });
+ allocator();
+ var response = yield memory.getAllocations();
+ yield memory.stopRecordingAllocations();
+ return response.allocations.length;
+ });
+
+ is((yield testProbability(0.0)), 0,
+ "With probability = 0.0, we shouldn't get any allocations.");
+
+ ok((yield testProbability(1.0)) >= 100,
+ "With probability = 1.0, we should get all 100 allocations (plus "
+ + "whatever allocations the actor and SpiderMonkey make).");
+
+ // We don't test any other probabilities because the test would be
+ // non-deterministic. We don't have a way to control the PRNG like we do in
+ // jit-tests
+ // (js/src/jit-test/tests/debug/Memory-allocationsSamplingProbability-*.js).
+
+ yield memory.detach();
+ destroyServerAndFinish(client);
+ });
+};
+</script>
+</pre>
+</body>
+</html>