components/scheduling_metrics/total_duration_metric_reporter.cc

   1 // Copyright 2018 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/scheduling_metrics/total_duration_metric_reporter.h"
   6
   7 namespace scheduling_metrics {
   8
   9 namespace {
  10
  11 constexpr base::TimeDelta kMinimalValue = base::TimeDelta::FromSeconds(1);
  12 constexpr base::TimeDelta kMaximalValue = base::TimeDelta::FromHours(1);
  13 constexpr int kBucketCount = 50;
  14
  15 }  // namespace
  16
  17 TotalDurationMetricReporter::TotalDurationMetricReporter(
  18     const char* positive_histogram_name,
  19     const char* negative_histogram_name)
  20     : positive_histogram_(base::Histogram::FactoryGet(
  21           positive_histogram_name,
  22           kMinimalValue.InSeconds(),
  23           kMaximalValue.InSeconds(),
  24           kBucketCount,
  25           base::Histogram::kUmaTargetedHistogramFlag)),
  26       negative_histogram_(base::Histogram::FactoryGet(
  27           negative_histogram_name,
  28           kMinimalValue.InSeconds(),
  29           kMaximalValue.InSeconds(),
  30           kBucketCount,
  31           base::Histogram::kUmaTargetedHistogramFlag)) {}
  32
  33 void TotalDurationMetricReporter::RecordAdditionalDuration(
  34     base::TimeDelta duration) {
  35   if (reported_value_)
  36     negative_histogram_->Add(reported_value_->InSeconds());
  37   reported_value_ = reported_value_.value_or(base::TimeDelta()) + duration;
  38   positive_histogram_->Add(reported_value_->InSeconds());
  39 }
  40
  41 void TotalDurationMetricReporter::Reset() {
  42   reported_value_ = base::nullopt;
  43 }
  44
  45 }  // namespace scheduling_metrics