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
|
// 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 "components/permissions/prediction_service/prediction_model_handler.h"
#include <memory>
#include "base/feature_list.h"
#include "components/optimization_guide/core/delivery/optimization_guide_model_provider.h"
#include "components/permissions/features.h"
#include "components/permissions/prediction_service/prediction_signature_model_executor.h"
#include "components/version_info/version_info.h"
namespace permissions {
PredictionModelHandler::PredictionModelHandler(
optimization_guide::OptimizationGuideModelProvider* model_provider,
optimization_guide::proto::OptimizationTarget optimization_target)
: ModelHandler<GeneratePredictionsResponse,
const PredictionModelExecutorInput&>(
model_provider,
base::ThreadPool::CreateSequencedTaskRunner(
{base::MayBlock(), base::TaskPriority::USER_VISIBLE}),
GetExecutor(),
/*model_inference_timeout=*/std::nullopt,
optimization_target,
GetModelHandshakeProto()) {}
PredictionModelHandler::~PredictionModelHandler() = default;
void PredictionModelHandler::OnModelUpdated(
optimization_guide::proto::OptimizationTarget optimization_target,
base::optional_ref<const optimization_guide::ModelInfo> model_info) {
// First invoke parent to update internal status.
optimization_guide::ModelHandler<
GeneratePredictionsResponse,
const PredictionModelExecutorInput&>::OnModelUpdated(optimization_target,
model_info);
if (model_info.has_value()) {
// The parent class should always set the model availability to true after
// having received an updated model.
DCHECK(ModelAvailable());
prediction_model_metadata_ = ParsedSupportedFeaturesForLoadedModel<
WebPermissionPredictionsModelMetadata>();
}
model_load_run_loop_.Quit();
}
void PredictionModelHandler::ExecuteModelWithMetadata(
ExecutionCallback callback,
std::unique_ptr<GeneratePredictionsRequest> proto_request) {
// Check that the right model is served before execution. Only v2 models can
// be used with the Signature runner
const bool is_model_mismatch =
base::FeatureList::IsEnabled(features::kCpssUseTfliteSignatureRunner) &&
prediction_model_metadata_->version() != 2;
base::UmaHistogramBoolean(
"Permissions.PredictionService.SignatureModel.Mismatch",
is_model_mismatch);
if (is_model_mismatch) {
return;
}
PredictionModelExecutorInput input;
input.request = *proto_request;
input.metadata = prediction_model_metadata_;
ExecuteModelWithInput(std::move(callback), input);
}
void PredictionModelHandler::WaitForModelLoadForTesting() {
model_load_run_loop_.Run();
}
std::unique_ptr<
optimization_guide::ModelExecutor<GeneratePredictionsResponse,
const PredictionModelExecutorInput&>>
PredictionModelHandler::GetExecutor() {
if (base::FeatureList::IsEnabled(features::kCpssUseTfliteSignatureRunner)) {
return std::make_unique<PredictionSignatureModelExecutor>();
}
return std::make_unique<PredictionModelExecutor>();
}
std::optional<optimization_guide::proto::Any>
PredictionModelHandler::GetModelHandshakeProto() {
if (base::FeatureList::IsEnabled(features::kCpssUseTfliteSignatureRunner)) {
const char url[] =
"type.googleapis.com/"
"google.privacy.webpermissionpredictions.v1."
"WebPermissionPredictionsClientInfo";
optimization_guide::proto::Any any_metadata;
any_metadata.set_type_url(url);
WebPermissionPredictionsClientInfo model_handshake_info;
model_handshake_info.set_milestone(
version_info::GetMajorVersionNumberAsInt());
model_handshake_info.SerializeToString(any_metadata.mutable_value());
return any_metadata;
}
return std::nullopt;
}
std::optional<float> PredictionModelHandler::HoldBackProbability() {
if (!prediction_model_metadata_.has_value()) {
return std::nullopt;
}
return prediction_model_metadata_->holdback_probability();
}
} // namespace permissions
|
