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content / browser / preloading / prerender / prerender_metrics.cc [blame]
// Copyright 2021 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/prerender/prerender_metrics.h"
#include <cmath>
#include <memory>
#include <optional>
#include "base/check_op.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/metrics_hashes.h"
#include "base/strings/string_util.h"
#include "content/browser/devtools/devtools_instrumentation.h"
#include "content/browser/preloading/preloading_trigger_type_impl.h"
#include "content/browser/preloading/prerender/prerender_final_status.h"
#include "content/browser/preloading/prerender/prerender_host.h"
#include "content/public/browser/preloading_trigger_type.h"
#include "services/metrics/public/cpp/ukm_builders.h"
#include "services/metrics/public/cpp/ukm_recorder.h"
namespace content {
namespace {
// Do not add new value.
// These values are used to persists sparse metrics to logs.
enum HeaderMismatchType : uint32_t {
kMatch = 0,
kMissingInPrerendering = 1,
kMissingInActivation = 2,
kValueMismatch = 3,
kMaxValue = kValueMismatch
};
PrerenderCancelledInterface GetCancelledInterfaceType(
const std::string& interface_name) {
if (interface_name == "device.mojom.GamepadHapticsManager")
return PrerenderCancelledInterface::kGamepadHapticsManager;
else if (interface_name == "device.mojom.GamepadMonitor")
return PrerenderCancelledInterface::kGamepadMonitor;
else if (interface_name ==
"chrome.mojom.TrustedVaultEncryptionKeysExtension") {
return PrerenderCancelledInterface::kTrustedVaultEncryptionKeys;
}
return PrerenderCancelledInterface::kUnknown;
}
int32_t InterfaceNameHasher(const std::string& interface_name) {
return static_cast<int32_t>(base::HashMetricNameAs32Bits(interface_name));
}
int32_t HeaderMismatchHasher(const std::string& header,
HeaderMismatchType mismatch_type) {
// Throw two bits away to encode the mismatch type.
// {0---30} bits are the encoded hash number.
// {31, 32} bits encode the mismatch type.
static_assert(HeaderMismatchType::kMaxValue == 3u,
"HeaderMismatchType should use 2 bits at most.");
return static_cast<int32_t>(base::HashMetricNameAs32Bits(header) << 2 |
mismatch_type);
}
std::string GenerateHistogramName(const std::string& histogram_base_name,
PreloadingTriggerType trigger_type,
const std::string& embedder_suffix) {
return histogram_base_name +
GeneratePrerenderHistogramSuffix(trigger_type, embedder_suffix);
}
void ReportHeaderMismatch(const std::string& key,
HeaderMismatchType mismatch_type,
const std::string& histogram_suffix) {
base::UmaHistogramSparse(
"Prerender.Experimental.ActivationHeadersMismatch" + histogram_suffix,
HeaderMismatchHasher(base::ToLowerASCII(key), mismatch_type));
}
void ReportAllPrerenderMismatchedHeaders(
const std::vector<PrerenderMismatchedHeaders>& mismatched_headers,
const std::string& histogram_suffix) {
for (const auto& mismatched_header : mismatched_headers) {
if (mismatched_header.initial_value.has_value() &&
mismatched_header.activation_value.has_value()) {
ReportHeaderMismatch(mismatched_header.header_name,
HeaderMismatchType::kValueMismatch,
histogram_suffix);
} else if (mismatched_header.initial_value.has_value()) {
ReportHeaderMismatch(mismatched_header.header_name,
HeaderMismatchType::kMissingInActivation,
histogram_suffix);
} else {
ReportHeaderMismatch(mismatched_header.header_name,
HeaderMismatchType::kMissingInPrerendering,
histogram_suffix);
}
}
}
// Called by MojoBinderPolicyApplier. This function records the Mojo interface
// that causes MojoBinderPolicyApplier to cancel prerendering.
void RecordPrerenderCancelledInterface(const std::string& interface_name,
const std::string& histogram_suffix) {
const PrerenderCancelledInterface interface_type =
GetCancelledInterfaceType(interface_name);
base::UmaHistogramEnumeration(
"Prerender.Experimental.PrerenderCancelledInterface" + histogram_suffix,
interface_type);
if (interface_type == PrerenderCancelledInterface::kUnknown) {
// These interfaces can be required by embedders, or not set to kCancel
// expclitly, e.g., channel-associated interfaces. Record these interfaces
// with the sparse histogram to ensure all of them are tracked.
base::UmaHistogramSparse(
"Prerender.Experimental.PrerenderCancelledUnknownInterface" +
histogram_suffix,
InterfaceNameHasher(interface_name));
}
}
void RecordPrerenderFinalStatusUma(
PrerenderFinalStatus final_status,
PreloadingTriggerType trigger_type,
const std::string& embedder_histogram_suffix) {
base::UmaHistogramEnumeration(
GenerateHistogramName("Prerender.Experimental.PrerenderHostFinalStatus",
trigger_type, embedder_histogram_suffix),
final_status);
}
void RecordDidFailLoadErrorType(int32_t error_code,
const std::string& histogram_suffix) {
base::UmaHistogramSparse(
"Prerender.Experimental.PrerenderLoadingFailureError" + histogram_suffix,
std::abs(error_code));
}
} // namespace
// static
PrerenderCancellationReason
PrerenderCancellationReason::BuildForDisallowActivationState(
uint64_t disallow_activation_reason) {
return PrerenderCancellationReason(
PrerenderFinalStatus::kInactivePageRestriction,
disallow_activation_reason);
}
// static
PrerenderCancellationReason
PrerenderCancellationReason::BuildForMojoBinderPolicy(
const std::string& interface_name) {
return PrerenderCancellationReason(PrerenderFinalStatus::kMojoBinderPolicy,
interface_name);
}
const std::vector<PrerenderMismatchedHeaders>*
PrerenderCancellationReason::GetPrerenderMismatchedHeaders() const {
return absl::get_if<std::vector<PrerenderMismatchedHeaders>>(&explanation_);
}
// static
PrerenderCancellationReason PrerenderCancellationReason::
CreateCandidateReasonForActivationParameterMismatch() {
return PrerenderCancellationReason(
PrerenderFinalStatus::kActivationNavigationParameterMismatch);
}
void PrerenderCancellationReason::SetPrerenderMismatchedHeaders(
std::unique_ptr<std::vector<PrerenderMismatchedHeaders>>
mismatched_headers) {
explanation_ = std::move(*mismatched_headers);
}
// static
PrerenderCancellationReason PrerenderCancellationReason::BuildForLoadingError(
int32_t error_code) {
return PrerenderCancellationReason(PrerenderFinalStatus::kDidFailLoad,
error_code);
}
PrerenderCancellationReason::PrerenderCancellationReason(
PrerenderFinalStatus final_status)
: PrerenderCancellationReason(final_status, DetailedReasonVariant()) {}
PrerenderCancellationReason::PrerenderCancellationReason(
PrerenderCancellationReason&& reason) = default;
PrerenderCancellationReason::~PrerenderCancellationReason() = default;
PrerenderCancellationReason::PrerenderCancellationReason(
PrerenderFinalStatus final_status,
DetailedReasonVariant explanation)
: final_status_(final_status), explanation_(std::move(explanation)) {}
void PrerenderCancellationReason::ReportMetrics(
const std::string& histogram_suffix) const {
switch (final_status_) {
case PrerenderFinalStatus::kInactivePageRestriction:
CHECK(absl::holds_alternative<uint64_t>(explanation_));
base::UmaHistogramSparse(
"Prerender.CanceledForInactivePageRestriction."
"DisallowActivationReason" +
histogram_suffix,
absl::get<uint64_t>(explanation_));
break;
case PrerenderFinalStatus::kMojoBinderPolicy:
CHECK(absl::holds_alternative<std::string>(explanation_));
RecordPrerenderCancelledInterface(absl::get<std::string>(explanation_),
histogram_suffix);
break;
case PrerenderFinalStatus::kDidFailLoad:
CHECK(absl::holds_alternative<int32_t>(explanation_));
RecordDidFailLoadErrorType(absl::get<int32_t>(explanation_),
histogram_suffix);
break;
case PrerenderFinalStatus::kActivationNavigationParameterMismatch:
CHECK(absl::holds_alternative<std::vector<PrerenderMismatchedHeaders>>(
explanation_) ||
absl::holds_alternative<absl::monostate>(explanation_));
if (auto* mismatched_headers =
absl::get_if<std::vector<PrerenderMismatchedHeaders>>(
&explanation_)) {
ReportAllPrerenderMismatchedHeaders(*mismatched_headers,
histogram_suffix);
}
break;
default:
CHECK(absl::holds_alternative<absl::monostate>(explanation_));
// Other types need not to report.
break;
}
}
std::optional<std::string>
PrerenderCancellationReason::DisallowedMojoInterface() const {
switch (final_status_) {
case PrerenderFinalStatus::kMojoBinderPolicy:
return absl::get<std::string>(explanation_);
default:
return std::nullopt;
}
}
PrerenderMismatchedHeaders::PrerenderMismatchedHeaders(
const std::string& header_name,
std::optional<std::string> initial_value,
std::optional<std::string> activation_value)
: header_name(header_name),
initial_value(std::move(initial_value)),
activation_value(std::move(activation_value)) {}
PrerenderMismatchedHeaders::~PrerenderMismatchedHeaders() = default;
PrerenderMismatchedHeaders::PrerenderMismatchedHeaders(
const PrerenderMismatchedHeaders& other) = default;
PrerenderMismatchedHeaders::PrerenderMismatchedHeaders(
PrerenderMismatchedHeaders&& other) = default;
PrerenderMismatchedHeaders& PrerenderMismatchedHeaders::operator=(
const PrerenderMismatchedHeaders& other) = default;
PrerenderMismatchedHeaders& PrerenderMismatchedHeaders::operator=(
PrerenderMismatchedHeaders&& other) = default;
std::string GeneratePrerenderHistogramSuffix(
PreloadingTriggerType trigger_type,
const std::string& embedder_suffix) {
CHECK(embedder_suffix.empty() ||
trigger_type == PreloadingTriggerType::kEmbedder);
switch (trigger_type) {
case PreloadingTriggerType::kSpeculationRule:
return ".SpeculationRule";
case PreloadingTriggerType::kSpeculationRuleFromIsolatedWorld:
return ".SpeculationRuleFromIsolatedWorld";
case PreloadingTriggerType::kSpeculationRuleFromAutoSpeculationRules:
return ".SpeculationRuleFromAutoSpeculationRules";
case PreloadingTriggerType::kEmbedder:
return ".Embedder_" + embedder_suffix;
}
NOTREACHED();
}
void RecordPrerenderTriggered(ukm::SourceId ukm_id) {
ukm::builders::PrerenderPageLoad(ukm_id).SetTriggeredPrerender(true).Record(
ukm::UkmRecorder::Get());
}
void RecordPrerenderActivationTime(
base::TimeDelta delta,
PreloadingTriggerType trigger_type,
const std::string& embedder_histogram_suffix) {
base::UmaHistogramTimes(
GenerateHistogramName("Navigation.TimeToActivatePrerender", trigger_type,
embedder_histogram_suffix),
delta);
}
void RecordFailedPrerenderFinalStatus(
const PrerenderCancellationReason& cancellation_reason,
const PrerenderAttributes& attributes) {
CHECK_NE(cancellation_reason.final_status(),
PrerenderFinalStatus::kActivated);
RecordPrerenderFinalStatusUma(cancellation_reason.final_status(),
attributes.trigger_type,
attributes.embedder_histogram_suffix);
if (cancellation_reason.final_status() ==
PrerenderFinalStatus::kPrerenderFailedDuringPrefetch) {
const std::optional<PrefetchStatus>& prefetch_status =
attributes.preload_pipeline_info->prefetch_status();
if (prefetch_status.has_value()) {
base::UmaHistogramEnumeration(
GenerateHistogramName("Prerender.Experimental."
"PrefetchAheadOfPrerenderFailed.PrefetchStatus",
attributes.trigger_type,
attributes.embedder_histogram_suffix),
prefetch_status.value());
}
}
if (attributes.initiator_ukm_id != ukm::kInvalidSourceId) {
// `initiator_ukm_id` must be valid for the speculation rules.
CHECK(IsSpeculationRuleType(attributes.trigger_type));
ukm::builders::PrerenderPageLoad(attributes.initiator_ukm_id)
.SetFinalStatus(static_cast<int>(cancellation_reason.final_status()))
.Record(ukm::UkmRecorder::Get());
}
}
void ReportSuccessActivation(const PrerenderAttributes& attributes,
ukm::SourceId prerendered_ukm_id) {
RecordPrerenderFinalStatusUma(PrerenderFinalStatus::kActivated,
attributes.trigger_type,
attributes.embedder_histogram_suffix);
if (attributes.initiator_ukm_id != ukm::kInvalidSourceId) {
// `initiator_ukm_id` must be valid only for the speculation rules.
CHECK(IsSpeculationRuleType(attributes.trigger_type));
ukm::builders::PrerenderPageLoad(attributes.initiator_ukm_id)
.SetFinalStatus(static_cast<int>(PrerenderFinalStatus::kActivated))
.Record(ukm::UkmRecorder::Get());
}
if (prerendered_ukm_id != ukm::kInvalidSourceId) {
ukm::builders::PrerenderPageLoad(prerendered_ukm_id)
.SetFinalStatus(static_cast<int>(PrerenderFinalStatus::kActivated))
.Record(ukm::UkmRecorder::Get());
}
}
void RecordPrerenderActivationNavigationParamsMatch(
PrerenderHost::ActivationNavigationParamsMatch result,
const std::string& histogram_suffix) {
base::UmaHistogramEnumeration(
"Prerender.Experimental.ActivationNavigationParamsMatch" +
histogram_suffix,
result);
}
void RecordPrerenderRedirectionMismatchType(
PrerenderCrossOriginRedirectionMismatch mismatch_type,
const std::string& histogram_suffix) {
base::UmaHistogramEnumeration(
"Prerender.Experimental.PrerenderCrossOriginRedirectionMismatch" +
histogram_suffix,
mismatch_type);
}
void RecordPrerenderRedirectionProtocolChange(
PrerenderCrossOriginRedirectionProtocolChange change_type,
const std::string& histogram_suffix) {
base::UmaHistogramEnumeration(
"Prerender.Experimental.CrossOriginRedirectionProtocolChange" +
histogram_suffix,
change_type);
}
void RecordPrerenderActivationTransition(
int32_t potential_activation_transition,
const std::string& histogram_suffix) {
base::UmaHistogramSparse(
"Prerender.Experimental.ActivationTransitionMismatch" + histogram_suffix,
potential_activation_transition);
}
static_assert(
static_cast<int>(PrerenderBackNavigationEligibility::kMaxValue) +
static_cast<int>(
PreloadingEligibility::kPreloadingEligibilityContentStart2) <
static_cast<int>(PreloadingEligibility::kPreloadingEligibilityContentEnd2));
PreloadingEligibility ToPreloadingEligibility(
PrerenderBackNavigationEligibility eligibility) {
if (eligibility == PrerenderBackNavigationEligibility::kEligible) {
return PreloadingEligibility::kEligible;
}
return static_cast<PreloadingEligibility>(
static_cast<int>(eligibility) +
static_cast<int>(
PreloadingEligibility::kPreloadingEligibilityContentStart2));
}
void RecordPrerenderBackNavigationEligibility(
PreloadingPredictor predictor,
PrerenderBackNavigationEligibility eligibility,
PreloadingAttempt* preloading_attempt) {
const std::string histogram_name =
std::string("Preloading.PrerenderBackNavigationEligibility.") +
std::string(predictor.name());
base::UmaHistogramEnumeration(histogram_name, eligibility);
if (preloading_attempt) {
preloading_attempt->SetEligibility(ToPreloadingEligibility(eligibility));
}
}
void RecordPrerenderActivationCommitDeferTime(
base::TimeDelta time_delta,
PreloadingTriggerType trigger_type,
const std::string& embedder_histogram_suffix) {
base::UmaHistogramTimes(
GenerateHistogramName("Navigation.Prerender.ActivationCommitDeferTime",
trigger_type, embedder_histogram_suffix),
time_delta);
}
void RecordReceivedPrerendersPerPrimaryPageChangedCount(
int number,
PreloadingTriggerType trigger_type,
const std::string& eagerness_category) {
base::UmaHistogramCounts100(
GenerateHistogramName("Prerender.Experimental."
"ReceivedPrerendersPerPrimaryPageChangedCount2",
trigger_type, /*embedder_suffix=*/"") +
"." + eagerness_category,
number);
}
} // namespace content