forked from mirrors/gecko-dev
70 lines
2.3 KiB
JavaScript
70 lines
2.3 KiB
JavaScript
"use strict";
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var session = ChromeUtils.import("resource://gre/modules/TelemetrySession.jsm", {});
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const DUMMY_PAGE_DATA_URI = `data:text/html,
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<html>
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<head>
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<meta charset="utf-8"/>
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<title>Dummy</title>
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</head>
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<body>
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<h1 id='header'>Just a regular everyday normal page.</h1>
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</body>
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</html>`;
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/**
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* Tests the MEMORY_DISTRIBUTION_AMONG_CONTENT probe by opening a few tabs, then triggering
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* the memory probes and waiting for the "gather-memory-telemetry-finished" notification.
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*/
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add_task(async function test_memory_distribution() {
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waitForExplicitFinish();
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if (SpecialPowers.getIntPref("dom.ipc.processCount", 1) < 2) {
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ok(true, "Skip this test if e10s-multi is disabled.");
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finish();
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return;
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}
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Services.telemetry.canRecordExtended = true;
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let histogram = Services.telemetry.getKeyedHistogramById("MEMORY_DISTRIBUTION_AMONG_CONTENT");
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histogram.clear();
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let tab1 = await BrowserTestUtils.openNewForegroundTab(gBrowser, DUMMY_PAGE_DATA_URI);
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let tab2 = await BrowserTestUtils.openNewForegroundTab(gBrowser, DUMMY_PAGE_DATA_URI);
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let tab3 = await BrowserTestUtils.openNewForegroundTab(gBrowser, DUMMY_PAGE_DATA_URI);
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let finishedGathering = new Promise(resolve => {
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let obs = function () {
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Services.obs.removeObserver(obs, "gather-memory-telemetry-finished");
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resolve();
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}
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Services.obs.addObserver(obs, "gather-memory-telemetry-finished");
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});
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session.TelemetrySession.getPayload();
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await finishedGathering;
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let s = histogram.snapshot();
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ok("0 - 10 tabs" in s, "We should have some samples by now in this bucket.")
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for (var key in s) {
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is(key, "0 - 10 tabs");
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let fewTabsSnapshot = s[key];
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ok(fewTabsSnapshot.sum > 0, "Zero difference between all the content processes is unlikely, what happened?");
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ok(fewTabsSnapshot.sum < 80, "20 percentage difference on average is unlikely, what happened?");
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let c = fewTabsSnapshot.counts;
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for (let i = 10; i < c.length; i++) {
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// If this check fails it means that one of the content processes uses at least 20% more or 20% less than the mean.
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is(c[i], 0, "All the buckets above 10 should be empty");
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}
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}
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histogram.clear();
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BrowserTestUtils.removeTab(tab3);
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BrowserTestUtils.removeTab(tab2);
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BrowserTestUtils.removeTab(tab1);
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finish();
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});
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