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annotate chrome/memory.js @ 208:3f290bcae11a

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wtf
author Jeff Hammel <jhammel@mozilla.com>
date Mon, 13 Feb 2012 16:24:06 -0800
parents beca399c3a16
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 var gChildProcess = true;
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3 var gMemCallback = null;
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6 /*
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7 * Initialize memory collector. Determine if we have a child process.
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8 */
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9 function initializeMemoryCollector(callback, args) {
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10 gMemCallback = function() { return callback(args); };
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12 var os = Components.classes["@mozilla.org/observer-service;1"].
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13 getService(Components.interfaces.nsIObserverService);
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14
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15 os.addObserver(function () {
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16 var os = Components.classes["@mozilla.org/observer-service;1"].
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17 getService(Components.interfaces.nsIObserverService);
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19 memTimer.cancel();
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20 memTimer = null;
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22 os.removeObserver(arguments.callee, "child-memory-reporter-update", false);
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23 os.addObserver(collectAndReport, "child-memory-reporter-update", false);
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24 gMemCallback();
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25 }, "child-memory-reporter-update", false);
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27 /*
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28 * Assume we have a child process, but if timer fires before we call the observer
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29 * we will assume there is no child process.
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30 */
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31 var event = {
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32 notify: function(timer) {
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33 memTimer = null;
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34 gChildProcess = false;
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35 gMemCallback();
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36 }
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37 }
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39 memTimer = Components.classes["@mozilla.org/timer;1"].createInstance(Components.interfaces.nsITimer);
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40 memTimer.initWithCallback(event, 10000, Components.interfaces.nsITimer.TYPE_ONE_SHOT);
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42 os.notifyObservers(null, "child-memory-reporter-request", null);
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43 }
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45 /*
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46 * Collect memory from all processes and callback when done collecting.
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47 */
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48 function collectMemory(callback, args) {
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49 gMemCallback = function() { return callback(args); };
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50
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51 if (gChildProcess) {
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52 var os = Components.classes["@mozilla.org/observer-service;1"].
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53 getService(Components.interfaces.nsIObserverService);
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54
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55 os.notifyObservers(null, "child-memory-reporter-request", null);
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56 } else {
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57 collectAndReport(null, null, null);
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58 }
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59 }
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60
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61 function collectAndReport(aSubject, aTopic, aData) {
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62 dumpLine(collectRSS());
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63 gMemCallback();
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64 }
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65
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66 function collectRSS() {
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67 var mgr = Components.classes["@mozilla.org/memory-reporter-manager;1"].
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68 getService(Components.interfaces.nsIMemoryReporterManager);
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69 var e = mgr.enumerateReporters();
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70 text = "";
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71 while (e.hasMoreElements()) {
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72 var reporter = e.getNext().QueryInterface(Components.interfaces.nsIMemoryReporter);
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73 if (reporter.path == 'resident') {
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74 procName = reporter.process;
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75 if (procName == '')
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76 procName = "Main";
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77
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78 //For content process it is in the format "Content (<PID>)", we just want Content
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79 procName = procName.split(' ')[0];
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80 text += "RSS: " + procName + ": " + reporter.amount + "\n";
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81 }
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82 }
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83 return text;
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84 }
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85
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86 /*
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87 * Cleanup and stop memory collector.
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88 */
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89 function stopMemCollector() {
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90 if (gChildProcess) {
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91 var os = Cc["@mozilla.org/observer-service;1"].
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92 getService(Ci.nsIObserverService);
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93 os.removeObserver(collectAndReport, "child-memory-reporter-update");
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94 }
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95 }