| <!DOCTYPE html> |
| <!-- |
| Copyright 2020 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| |
| <link rel="import" href="/tracing/metrics/metric_registry.html"> |
| <link rel="import" href="/tracing/metrics/system_health/utils.html"> |
| <link rel="import" href="/tracing/value/histogram.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tr.exportTo('tr.metrics.sh', function() { |
| function weblayerStartupMetric(histograms, model) { |
| const startupWallHist = new tr.v.Histogram('weblayer_startup_wall_time', |
| tr.b.Unit.byName.timeDurationInMs_smallerIsBetter); |
| startupWallHist.description = 'WebLayer startup wall time'; |
| const loadWallHist = new tr.v.Histogram('weblayer_url_load_wall_time', |
| tr.b.Unit.byName.timeDurationInMs_smallerIsBetter); |
| loadWallHist.description = 'WebLayer blank URL load wall time'; |
| |
| // TODO(alexandermont): Only iterate over the processes and threads that |
| // could contain these events. |
| for (const slice of model.getDescendantEvents()) { |
| if (!(slice instanceof tr.model.ThreadSlice)) continue; |
| |
| // WebLayerStartupInterval is the title of the section of code that is |
| // entered (via android.os.Trace.beginSection) when WebLayer is started |
| // up. This value is defined in TelemetryActivity.java. |
| if (slice.title === 'WebLayerStartupInterval') { |
| startupWallHist.addSample(slice.duration); |
| } |
| |
| // WebLayerBlankUrlLoadInterval is the title of the section of code |
| // that is entered (via android.os.Trace.beginSection) when WebLayer |
| // is started up. This value is defined in TelemetryActivity.java. |
| if (slice.title === 'WebLayerBlankUrlLoadInterval') { |
| loadWallHist.addSample(slice.duration); |
| } |
| } |
| |
| histograms.addHistogram(startupWallHist); |
| histograms.addHistogram(loadWallHist); |
| } |
| |
| tr.metrics.MetricRegistry.register(weblayerStartupMetric); |
| |
| return { |
| weblayerStartupMetric, |
| }; |
| }); |
| </script> |
