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1174ad2f82
Depends on D10564 Differential Revision: https://phabricator.services.mozilla.com/D11293 --HG-- extra : moz-landing-system : lando
63 lines
2.2 KiB
JavaScript
63 lines
2.2 KiB
JavaScript
/* Any copyright is dedicated to the Public Domain.
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http://creativecommons.org/publicdomain/zero/1.0/ */
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/**
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* Tests if the retrieved profiler data samples are correctly filtered and
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* normalized before passed to consumers.
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*/
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"use strict";
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// time in ms
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const WAIT_TIME = 1000;
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add_task(async function() {
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await SpecialPowers.pushPrefEnv({"set": [["privacy.reduceTimerPrecision", false]]});
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const target = await addTabTarget(MAIN_DOMAIN + "doc_perf.html");
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const front = await target.getFront("performance");
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// Perform the first recording...
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const firstRecording = await front.startRecording();
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const firstRecordingStartTime = firstRecording._startTime;
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info("Started profiling at: " + firstRecordingStartTime);
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// allow the profiler module to sample some cpu activity
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busyWait(WAIT_TIME);
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await front.stopRecording(firstRecording);
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ok(firstRecording.getDuration() >= WAIT_TIME,
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"The first recording duration is correct.");
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// Perform the second recording...
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const secondRecording = await front.startRecording();
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const secondRecordingStartTime = secondRecording._startTime;
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info("Started profiling at: " + secondRecordingStartTime);
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// allow the profiler module to sample more cpu activity
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busyWait(WAIT_TIME);
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await front.stopRecording(secondRecording);
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const secondRecordingProfile = secondRecording.getProfile();
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const secondRecordingSamples = secondRecordingProfile.threads[0].samples.data;
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ok(secondRecording.getDuration() >= WAIT_TIME,
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"The second recording duration is correct.");
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const TIME_SLOT = secondRecordingProfile.threads[0].samples.schema.time;
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ok(secondRecordingSamples[0][TIME_SLOT] < secondRecordingStartTime,
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"The second recorded sample times were normalized.");
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ok(secondRecordingSamples[0][TIME_SLOT] > 0,
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"The second recorded sample times were normalized correctly.");
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ok(!secondRecordingSamples.find(
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e => e[TIME_SLOT] + secondRecordingStartTime <= firstRecording.getDuration()
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),
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"There should be no samples from the first recording in the second one, " +
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"even though the total number of frames did not overflow.");
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await target.destroy();
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gBrowser.removeCurrentTab();
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});
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