1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
content / browser / preloading / preloading_prediction.cc [blame]
// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/preloading/preloading_prediction.h"
#include "base/metrics/histogram_functions.h"
#include "base/strings/strcat.h"
#include "content/public/browser/page.h"
#include "services/metrics/public/cpp/metrics_utils.h"
#include "services/metrics/public/cpp/ukm_builders.h"
#include "services/metrics/public/cpp/ukm_recorder.h"
namespace content {
PreloadingPrediction::PreloadingPrediction(
PreloadingPredictor predictor,
PreloadingConfidence confidence,
ukm::SourceId triggered_primary_page_source_id,
PreloadingURLMatchCallback url_match_predicate)
: predictor_type_(predictor),
triggered_primary_page_source_id_(triggered_primary_page_source_id),
url_match_predicate_(std::move(url_match_predicate)),
confidence_(confidence) {}
PreloadingPrediction::~PreloadingPrediction() = default;
PreloadingPrediction::PreloadingPrediction(PreloadingPrediction&&) = default;
PreloadingPrediction& PreloadingPrediction::operator=(PreloadingPrediction&&) =
default;
void PreloadingPrediction::RecordPreloadingPredictionUKMs(
ukm::SourceId navigated_page_source_id,
std::optional<double> sampling_likelihood) {
ukm::UkmRecorder* ukm_recorder = ukm::UkmRecorder::Get();
const int sampling_likelihood_per_million =
sampling_likelihood ? static_cast<int>(1'000'000 * *sampling_likelihood)
: 1'000'000;
constexpr double kBucketSpacing = 1.3;
const int sampling_amount_bucket = ukm::GetExponentialBucketMin(
1'000'000 - sampling_likelihood_per_million, kBucketSpacing);
// Don't log when the source id is invalid.
if (navigated_page_source_id != ukm::kInvalidSourceId) {
ukm::builders::Preloading_Prediction builder(navigated_page_source_id);
builder.SetPreloadingPredictor(predictor_type_.ukm_value())
.SetConfidence(static_cast<int>(confidence_))
.SetAccuratePrediction(is_accurate_prediction_)
.SetSamplingAmount(sampling_amount_bucket);
if (time_to_next_navigation_) {
builder.SetTimeToNextNavigation(ukm::GetExponentialBucketMinForCounts1000(
time_to_next_navigation_->InMilliseconds()));
}
builder.Record(ukm_recorder);
}
if (triggered_primary_page_source_id_ != ukm::kInvalidSourceId) {
ukm::builders::Preloading_Prediction_PreviousPrimaryPage builder(
triggered_primary_page_source_id_);
builder.SetPreloadingPredictor(predictor_type_.ukm_value())
.SetConfidence(static_cast<int>(confidence_))
.SetAccuratePrediction(is_accurate_prediction_)
.SetSamplingAmount(sampling_amount_bucket);
if (time_to_next_navigation_) {
builder.SetTimeToNextNavigation(ukm::GetExponentialBucketMinForCounts1000(
time_to_next_navigation_->InMilliseconds()));
}
builder.Record(ukm_recorder);
}
}
void PreloadingPrediction::SetIsAccuratePrediction(const GURL& navigated_url) {
DCHECK(url_match_predicate_);
// `PreloadingAttemptImpl::SetIsAccurateTriggering` is called during
// `WCO::DidStartNavigation`.
if (!time_to_next_navigation_) {
time_to_next_navigation_ = elapsed_timer_.Elapsed();
}
// Use the predicate to match the URLs as the matching logic varies for each
// predictor.
is_accurate_prediction_ |= url_match_predicate_.Run(navigated_url);
}
ExperimentalPreloadingPrediction::ExperimentalPreloadingPrediction(
std::string_view name,
PreloadingURLMatchCallback url_match_predicate,
float score,
float min_score,
float max_score,
size_t buckets)
: name_(name),
buckets_(buckets),
normalized_score_((score - min_score) / (max_score - min_score)),
url_match_predicate_(std::move(url_match_predicate)) {
CHECK_GT(max_score, min_score);
CHECK_LT(buckets, 101u);
}
void ExperimentalPreloadingPrediction::SetIsAccuratePrediction(
const GURL& navigated_url) {
is_accurate_prediction_ = url_match_predicate_.Run(navigated_url);
}
ExperimentalPreloadingPrediction::~ExperimentalPreloadingPrediction() = default;
ExperimentalPreloadingPrediction::ExperimentalPreloadingPrediction(
ExperimentalPreloadingPrediction&&) = default;
ExperimentalPreloadingPrediction& ExperimentalPreloadingPrediction::operator=(
ExperimentalPreloadingPrediction&&) = default;
void ExperimentalPreloadingPrediction::RecordToUMA() const {
const auto uma_experimental_prediction =
base::StrCat({"Preloading.Experimental.", PredictorName(), ".",
IsAccuratePrediction() ? "Positive" : "Negative"});
base::UmaHistogramExactLinear(uma_experimental_prediction,
normalized_score_ * buckets_, buckets_ + 1);
}
ModelPredictionTrainingData::ModelPredictionTrainingData(
OutcomeCallback on_record_outcome,
PreloadingURLMatchCallback url_match_predicate)
: on_record_outcome_(std::move(on_record_outcome)),
url_match_predicate_(std::move(url_match_predicate)) {}
ModelPredictionTrainingData::~ModelPredictionTrainingData() = default;
ModelPredictionTrainingData::ModelPredictionTrainingData(
ModelPredictionTrainingData&&) = default;
ModelPredictionTrainingData& ModelPredictionTrainingData::operator=(
ModelPredictionTrainingData&&) = default;
void ModelPredictionTrainingData::SetIsAccuratePrediction(
const GURL& navigated_url) {
is_accurate_prediction_ = url_match_predicate_.Run(navigated_url);
}
void ModelPredictionTrainingData::Record(
std::optional<double> sampling_likelihood) {
std::move(on_record_outcome_)
.Run(sampling_likelihood, is_accurate_prediction_);
}
} // namespace content