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| 1 <!DOCTYPE html> | 1 <!DOCTYPE html> |
| 2 <!-- | 2 <!-- |
| 3 Copyright (c) 2012 The Chromium Authors. All rights reserved. | 3 Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 4 Use of this source code is governed by a BSD-style license that can be | 4 Use of this source code is governed by a BSD-style license that can be |
| 5 found in the LICENSE file. | 5 found in the LICENSE file. |
| 6 --> | 6 --> |
| 7 | 7 |
| 8 <link rel="import" href="/tracing/base/base.html"> | 8 <link rel="import" href="/tracing/base/base.html"> |
| 9 <link rel="import" href="/tracing/base/event.html"> | 9 <link rel="import" href="/tracing/base/event.html"> |
| 10 <link rel="import" href="/tracing/base/interval_tree.html"> | 10 <link rel="import" href="/tracing/base/interval_tree.html"> |
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| 97 this.userFriendlyCategoryDrivers_ = []; | 97 this.userFriendlyCategoryDrivers_ = []; |
| 98 | 98 |
| 99 this.annotationsByGuid_ = {}; | 99 this.annotationsByGuid_ = {}; |
| 100 this.modelIndices = undefined; | 100 this.modelIndices = undefined; |
| 101 | 101 |
| 102 this.stats = new tr.model.ModelStats(); | 102 this.stats = new tr.model.ModelStats(); |
| 103 | 103 |
| 104 this.importWarnings_ = []; | 104 this.importWarnings_ = []; |
| 105 this.reportedImportWarnings_ = {}; | 105 this.reportedImportWarnings_ = {}; |
| 106 | 106 |
| 107 this.isTimeHighResolution_ = undefined; | 107 this.isTimeHighResolution_ = true; |
| 108 | 108 |
| 109 this.patchupsToApply_ = []; | 109 this.patchupsToApply_ = []; |
| 110 | 110 |
| 111 this.doesHelperGUIDSupportThisModel_ = {}; | 111 this.doesHelperGUIDSupportThisModel_ = {}; |
| 112 this.helpersByConstructorGUID_ = {}; | 112 this.helpersByConstructorGUID_ = {}; |
| 113 } | 113 } |
| 114 | 114 |
| 115 Model.prototype = { | 115 Model.prototype = { |
| 116 __proto__: tr.model.EventContainer.prototype, | 116 __proto__: tr.model.EventContainer.prototype, |
| 117 | 117 |
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| 386 | 386 |
| 387 set intrinsicTimeUnit(value) { | 387 set intrinsicTimeUnit(value) { |
| 388 if (this.intrinsicTimeUnit_ === value) | 388 if (this.intrinsicTimeUnit_ === value) |
| 389 return; | 389 return; |
| 390 if (this.intrinsicTimeUnit_ !== undefined) | 390 if (this.intrinsicTimeUnit_ !== undefined) |
| 391 throw new Error('Intrinsic time unit already set'); | 391 throw new Error('Intrinsic time unit already set'); |
| 392 this.intrinsicTimeUnit_ = value; | 392 this.intrinsicTimeUnit_ = value; |
| 393 }, | 393 }, |
| 394 | 394 |
| 395 get isTimeHighResolution() { | 395 get isTimeHighResolution() { |
| 396 if (this.isTimeHighResolution_ === undefined) | |
| 397 this.isTimeHighResolution_ = this.isTimeHighResolutionHeuristic_(); | |
| 398 return this.isTimeHighResolution_; | 396 return this.isTimeHighResolution_; |
| 399 }, | 397 }, |
| 400 | 398 |
| 401 set isTimeHighResolution(value) { | 399 set isTimeHighResolution(value) { |
| 402 if (this.isTimeHighResolution_ === value) | |
| 403 return; | |
| 404 if (this.isTimeHighResolution_ !== undefined) | |
| 405 throw new Error('isTimeHighResolution already set'); | |
| 406 this.isTimeHighResolution_ = value; | 400 this.isTimeHighResolution_ = value; |
| 407 }, | 401 }, |
| 408 | 402 |
| 409 /** | 403 /** |
| 410 * Returns a link to a trace data file that this model was imported from. | 404 * Returns a link to a trace data file that this model was imported from. |
| 411 * This is NOT the URL of a site being traced, but instead an indicator of | 405 * This is NOT the URL of a site being traced, but instead an indicator of |
| 412 * where the data is stored. | 406 * where the data is stored. |
| 413 */ | 407 */ |
| 414 get canonicalUrl() { | 408 get canonicalUrl() { |
| 415 return this.canonicalUrl_; | 409 return this.canonicalUrl_; |
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| 566 this.patchupsToApply_ = unresolved; | 560 this.patchupsToApply_ = unresolved; |
| 567 }, | 561 }, |
| 568 | 562 |
| 569 replacePIDRefsInPatchups: function(old_pid_ref, new_pid_ref) { | 563 replacePIDRefsInPatchups: function(old_pid_ref, new_pid_ref) { |
| 570 this.patchupsToApply_.forEach(function(patchup) { | 564 this.patchupsToApply_.forEach(function(patchup) { |
| 571 if (patchup.pidRef === old_pid_ref) | 565 if (patchup.pidRef === old_pid_ref) |
| 572 patchup.pidRef = new_pid_ref; | 566 patchup.pidRef = new_pid_ref; |
| 573 }); | 567 }); |
| 574 }, | 568 }, |
| 575 | 569 |
| 576 isTimeHighResolutionHeuristic_: function() { | |
| 577 if (this.intrinsicTimeUnit !== tr.v.TimeDisplayModes.ms) | |
| 578 return false; | |
| 579 // If the timer is only precise to the millisecond, then almost all event | |
| 580 // will be precisely X ms apart. We check that by looking at the | |
| 581 // decimal part of each event's start time. We create 100 bins for | |
| 582 // these fractions. If at least 90% of the events are in the same bin then | |
| 583 // the timer is deemed to be low resolution. | |
| 584 var nbEvents = 0; | |
| 585 var nbPerBin = []; | |
| 586 var maxEvents = 0; | |
| 587 for (var i = 0; i < 100; ++i) | |
| 588 nbPerBin.push(0); | |
| 589 this.iterateAllEvents(function(event) { | |
| 590 nbEvents++; | |
| 591 if (event.start !== undefined) { | |
| 592 // Compute | |
| 593 var remainder = Math.floor( | |
| 594 (event.start - Math.floor(event.start)) * 100); | |
| 595 nbPerBin[remainder]++; | |
| 596 maxEvents = Math.max(maxEvents, nbPerBin[remainder]); | |
| 597 } | |
| 598 }); | |
| 599 // If there are too few events our heuristic is not very good, assume the | |
| 600 // timer is high resolution. | |
| 601 if (nbEvents < 100) | |
| 602 return true; | |
| 603 // If more than 90% of the events are snapped precisely on milliseconds | |
| 604 // boundary we got a trace with a low resolution timer. | |
| 605 return (maxEvents / nbEvents) < 0.9; | |
| 606 }, | |
| 607 | |
| 608 /** | 570 /** |
| 609 * Called by the model to join references between objects, after final model | 571 * Called by the model to join references between objects, after final model |
| 610 * bounds have been computed. | 572 * bounds have been computed. |
| 611 */ | 573 */ |
| 612 joinRefs: function() { | 574 joinRefs: function() { |
| 613 this.joinObjectRefs_(); | 575 this.joinObjectRefs_(); |
| 614 this.applyObjectRefPatchups(); | 576 this.applyObjectRefPatchups(); |
| 615 }, | 577 }, |
| 616 | 578 |
| 617 joinObjectRefs_: function() { | 579 joinObjectRefs_: function() { |
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| 687 | 649 |
| 688 iterObjectFieldsRecursively(item.args); | 650 iterObjectFieldsRecursively(item.args); |
| 689 } | 651 } |
| 690 }; | 652 }; |
| 691 | 653 |
| 692 return { | 654 return { |
| 693 Model: Model | 655 Model: Model |
| 694 }; | 656 }; |
| 695 }); | 657 }); |
| 696 </script> | 658 </script> |
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Chromium Code Reviews
Issue 2016863004:
Removed the isTimeHighResolutionHeuristic_ heuristic. (Closed)
Base URL: https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git@master