mirror of
https://github.com/klzgrad/naiveproxy.git
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566 lines
24 KiB
C++
566 lines
24 KiB
C++
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/nqe/network_quality_estimator_params.h"
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#include <stdint.h>
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#include "base/strings/string_number_conversions.h"
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#include "base/time/time.h"
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namespace net {
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const char kForceEffectiveConnectionType[] = "force_effective_connection_type";
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namespace {
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// Minimum valid value of the variation parameter that holds RTT (in
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// milliseconds) values.
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static const int kMinimumRTTVariationParameterMsec = 1;
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// Minimum valid value of the variation parameter that holds throughput (in
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// kilobits per second) values.
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static const int kMinimumThroughputVariationParameterKbps = 1;
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// Returns the value of |parameter_name| read from |params|. If the
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// value is unavailable from |params|, then |default_value| is returned.
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int64_t GetValueForVariationParam(
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const std::map<std::string, std::string>& params,
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const std::string& parameter_name,
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int64_t default_value) {
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const auto it = params.find(parameter_name);
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int64_t variations_value = default_value;
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if (it != params.end() &&
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base::StringToInt64(it->second, &variations_value)) {
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return variations_value;
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}
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return default_value;
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}
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// Returns the variation value for |parameter_name|. If the value is
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// unavailable, |default_value| is returned.
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double GetDoubleValueForVariationParamWithDefaultValue(
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const std::map<std::string, std::string>& params,
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const std::string& parameter_name,
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double default_value) {
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const auto it = params.find(parameter_name);
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if (it == params.end())
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return default_value;
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double variations_value = default_value;
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if (!base::StringToDouble(it->second, &variations_value))
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return default_value;
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return variations_value;
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}
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// Returns the variation value for |parameter_name|. If the value is
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// unavailable, |default_value| is returned.
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std::string GetStringValueForVariationParamWithDefaultValue(
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const std::map<std::string, std::string>& params,
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const std::string& parameter_name,
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const std::string& default_value) {
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const auto it = params.find(parameter_name);
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if (it == params.end())
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return default_value;
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return it->second;
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}
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double GetWeightMultiplierPerSecond(
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const std::map<std::string, std::string>& params) {
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// Default value of the half life (in seconds) for computing time weighted
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// percentiles. Every half life, the weight of all observations reduces by
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// half. Lowering the half life would reduce the weight of older values
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// faster.
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int half_life_seconds = 60;
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int32_t variations_value = 0;
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auto it = params.find("HalfLifeSeconds");
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if (it != params.end() && base::StringToInt(it->second, &variations_value) &&
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variations_value >= 1) {
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half_life_seconds = variations_value;
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}
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DCHECK_GT(half_life_seconds, 0);
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return pow(0.5, 1.0 / half_life_seconds);
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}
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bool GetPersistentCacheReadingEnabled(
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const std::map<std::string, std::string>& params) {
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if (GetStringValueForVariationParamWithDefaultValue(
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params, "persistent_cache_reading_enabled", "true") != "true") {
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return false;
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}
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return true;
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}
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base::TimeDelta GetMinSocketWatcherNotificationInterval(
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const std::map<std::string, std::string>& params) {
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// Use 1000 milliseconds as the default value.
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return base::TimeDelta::FromMilliseconds(GetValueForVariationParam(
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params, "min_socket_watcher_notification_interval_msec", 1000));
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}
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// static
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const char* GetNameForConnectionTypeInternal(
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NetworkChangeNotifier::ConnectionType connection_type) {
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switch (connection_type) {
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case NetworkChangeNotifier::CONNECTION_UNKNOWN:
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return "Unknown";
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case NetworkChangeNotifier::CONNECTION_ETHERNET:
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return "Ethernet";
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case NetworkChangeNotifier::CONNECTION_WIFI:
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return "WiFi";
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case NetworkChangeNotifier::CONNECTION_2G:
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return "2G";
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case NetworkChangeNotifier::CONNECTION_3G:
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return "3G";
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case NetworkChangeNotifier::CONNECTION_4G:
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return "4G";
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case NetworkChangeNotifier::CONNECTION_NONE:
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return "None";
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case NetworkChangeNotifier::CONNECTION_BLUETOOTH:
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return "Bluetooth";
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}
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return "";
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}
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// Sets the default observation for different connection types in
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// |default_observations|. The default observations are different for
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// different connection types (e.g., 2G, 3G, 4G, WiFi). The default
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// observations may be used to determine the network quality in absence of any
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// other information.
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void ObtainDefaultObservations(
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const std::map<std::string, std::string>& params,
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nqe::internal::NetworkQuality default_observations[]) {
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for (size_t i = 0; i < NetworkChangeNotifier::CONNECTION_LAST; ++i) {
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DCHECK_EQ(nqe::internal::InvalidRTT(), default_observations[i].http_rtt());
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DCHECK_EQ(nqe::internal::InvalidRTT(),
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default_observations[i].transport_rtt());
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DCHECK_EQ(nqe::internal::INVALID_RTT_THROUGHPUT,
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default_observations[i].downstream_throughput_kbps());
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}
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// Default observations for HTTP RTT, transport RTT, and downstream throughput
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// Kbps for the various connection types. These may be overridden by
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// variations params. The default observation for a connection type
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// corresponds to typical network quality for that connection type.
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default_observations[NetworkChangeNotifier::CONNECTION_UNKNOWN] =
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nqe::internal::NetworkQuality(base::TimeDelta::FromMilliseconds(115),
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base::TimeDelta::FromMilliseconds(55),
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1961);
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default_observations[NetworkChangeNotifier::CONNECTION_ETHERNET] =
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nqe::internal::NetworkQuality(base::TimeDelta::FromMilliseconds(90),
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base::TimeDelta::FromMilliseconds(33),
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1456);
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default_observations[NetworkChangeNotifier::CONNECTION_WIFI] =
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nqe::internal::NetworkQuality(base::TimeDelta::FromMilliseconds(116),
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base::TimeDelta::FromMilliseconds(66),
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2658);
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default_observations[NetworkChangeNotifier::CONNECTION_2G] =
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nqe::internal::NetworkQuality(base::TimeDelta::FromMilliseconds(1726),
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base::TimeDelta::FromMilliseconds(1531),
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74);
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default_observations[NetworkChangeNotifier::CONNECTION_3G] =
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nqe::internal::NetworkQuality(base::TimeDelta::FromMilliseconds(272),
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base::TimeDelta::FromMilliseconds(209),
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749);
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default_observations[NetworkChangeNotifier::CONNECTION_4G] =
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nqe::internal::NetworkQuality(base::TimeDelta::FromMilliseconds(137),
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base::TimeDelta::FromMilliseconds(80),
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1708);
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default_observations[NetworkChangeNotifier::CONNECTION_NONE] =
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nqe::internal::NetworkQuality(base::TimeDelta::FromMilliseconds(163),
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base::TimeDelta::FromMilliseconds(83), 575);
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default_observations[NetworkChangeNotifier::CONNECTION_BLUETOOTH] =
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nqe::internal::NetworkQuality(base::TimeDelta::FromMilliseconds(385),
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base::TimeDelta::FromMilliseconds(318),
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476);
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// Override using the values provided via variation params.
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for (size_t i = 0; i <= NetworkChangeNotifier::CONNECTION_LAST; ++i) {
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NetworkChangeNotifier::ConnectionType type =
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static_cast<NetworkChangeNotifier::ConnectionType>(i);
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int32_t variations_value = kMinimumRTTVariationParameterMsec - 1;
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std::string parameter_name =
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std::string(GetNameForConnectionTypeInternal(type))
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.append(".DefaultMedianRTTMsec");
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auto it = params.find(parameter_name);
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if (it != params.end() &&
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base::StringToInt(it->second, &variations_value) &&
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variations_value >= kMinimumRTTVariationParameterMsec) {
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default_observations[i] = nqe::internal::NetworkQuality(
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base::TimeDelta::FromMilliseconds(variations_value),
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default_observations[i].transport_rtt(),
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default_observations[i].downstream_throughput_kbps());
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}
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variations_value = kMinimumRTTVariationParameterMsec - 1;
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parameter_name = std::string(GetNameForConnectionTypeInternal(type))
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.append(".DefaultMedianTransportRTTMsec");
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it = params.find(parameter_name);
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if (it != params.end() &&
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base::StringToInt(it->second, &variations_value) &&
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variations_value >= kMinimumRTTVariationParameterMsec) {
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default_observations[i] = nqe::internal::NetworkQuality(
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default_observations[i].http_rtt(),
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base::TimeDelta::FromMilliseconds(variations_value),
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default_observations[i].downstream_throughput_kbps());
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}
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variations_value = kMinimumThroughputVariationParameterKbps - 1;
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parameter_name = std::string(GetNameForConnectionTypeInternal(type))
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.append(".DefaultMedianKbps");
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it = params.find(parameter_name);
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if (it != params.end() &&
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base::StringToInt(it->second, &variations_value) &&
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variations_value >= kMinimumThroughputVariationParameterKbps) {
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default_observations[i] = nqe::internal::NetworkQuality(
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default_observations[i].http_rtt(),
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default_observations[i].transport_rtt(), variations_value);
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}
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}
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}
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// Sets |typical_network_quality| to typical network quality for different
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// effective connection types.
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void ObtainTypicalNetworkQualities(
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const std::map<std::string, std::string>& params,
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nqe::internal::NetworkQuality typical_network_quality[]) {
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for (size_t i = 0; i < EFFECTIVE_CONNECTION_TYPE_LAST; ++i) {
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DCHECK_EQ(nqe::internal::InvalidRTT(),
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typical_network_quality[i].http_rtt());
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DCHECK_EQ(nqe::internal::InvalidRTT(),
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typical_network_quality[i].transport_rtt());
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DCHECK_EQ(nqe::internal::INVALID_RTT_THROUGHPUT,
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typical_network_quality[i].downstream_throughput_kbps());
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}
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typical_network_quality[EFFECTIVE_CONNECTION_TYPE_SLOW_2G] =
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nqe::internal::NetworkQuality(
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// Set to the 77.5th percentile of 2G RTT observations on Android.
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// This corresponds to the median RTT observation when effective
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// connection type is Slow 2G.
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base::TimeDelta::FromMilliseconds(3600),
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base::TimeDelta::FromMilliseconds(3000), 40);
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typical_network_quality[EFFECTIVE_CONNECTION_TYPE_2G] =
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nqe::internal::NetworkQuality(
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// Set to the 58th percentile of 2G RTT observations on Android. This
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// corresponds to the median RTT observation when effective connection
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// type is 2G.
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base::TimeDelta::FromMilliseconds(1800),
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base::TimeDelta::FromMilliseconds(1500), 75);
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typical_network_quality[EFFECTIVE_CONNECTION_TYPE_3G] =
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nqe::internal::NetworkQuality(
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// Set to the 75th percentile of 3G RTT observations on Android. This
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// corresponds to the median RTT observation when effective connection
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// type is 3G.
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base::TimeDelta::FromMilliseconds(450),
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base::TimeDelta::FromMilliseconds(400), 400);
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// Set to the 25th percentile of 3G RTT observations on Android.
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typical_network_quality[EFFECTIVE_CONNECTION_TYPE_4G] =
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nqe::internal::NetworkQuality(base::TimeDelta::FromMilliseconds(175),
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base::TimeDelta::FromMilliseconds(125),
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1600);
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static_assert(
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EFFECTIVE_CONNECTION_TYPE_4G + 1 == EFFECTIVE_CONNECTION_TYPE_LAST,
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"Missing effective connection type");
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}
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// Sets the thresholds for different effective connection types in
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// |connection_thresholds|.
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void ObtainConnectionThresholds(
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const std::map<std::string, std::string>& params,
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nqe::internal::NetworkQuality connection_thresholds[]) {
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// First set the default thresholds.
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nqe::internal::NetworkQuality default_effective_connection_type_thresholds
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[EffectiveConnectionType::EFFECTIVE_CONNECTION_TYPE_LAST];
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default_effective_connection_type_thresholds
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[EFFECTIVE_CONNECTION_TYPE_SLOW_2G] = nqe::internal::NetworkQuality(
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// Set to the 66th percentile of 2G RTT observations on Android.
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base::TimeDelta::FromMilliseconds(2010),
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base::TimeDelta::FromMilliseconds(1870),
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nqe::internal::INVALID_RTT_THROUGHPUT);
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default_effective_connection_type_thresholds[EFFECTIVE_CONNECTION_TYPE_2G] =
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nqe::internal::NetworkQuality(
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// Set to the 50th percentile of RTT observations on Android.
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base::TimeDelta::FromMilliseconds(1420),
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base::TimeDelta::FromMilliseconds(1280),
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nqe::internal::INVALID_RTT_THROUGHPUT);
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default_effective_connection_type_thresholds[EFFECTIVE_CONNECTION_TYPE_3G] =
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nqe::internal::NetworkQuality(
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// Set to the 50th percentile of 3G RTT observations on Android.
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base::TimeDelta::FromMilliseconds(273),
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base::TimeDelta::FromMilliseconds(204),
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nqe::internal::INVALID_RTT_THROUGHPUT);
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// Connection threshold should not be set for 4G effective connection type
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// since it is the fastest.
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static_assert(
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EFFECTIVE_CONNECTION_TYPE_3G + 1 == EFFECTIVE_CONNECTION_TYPE_4G,
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"Missing effective connection type");
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static_assert(
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EFFECTIVE_CONNECTION_TYPE_4G + 1 == EFFECTIVE_CONNECTION_TYPE_LAST,
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"Missing effective connection type");
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for (size_t i = 0; i <= EFFECTIVE_CONNECTION_TYPE_3G; ++i) {
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EffectiveConnectionType effective_connection_type =
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static_cast<EffectiveConnectionType>(i);
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DCHECK_EQ(nqe::internal::InvalidRTT(), connection_thresholds[i].http_rtt());
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DCHECK_EQ(nqe::internal::InvalidRTT(),
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connection_thresholds[i].transport_rtt());
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DCHECK_EQ(nqe::internal::INVALID_RTT_THROUGHPUT,
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connection_thresholds[i].downstream_throughput_kbps());
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if (effective_connection_type == EFFECTIVE_CONNECTION_TYPE_UNKNOWN)
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continue;
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std::string connection_type_name = std::string(
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DeprecatedGetNameForEffectiveConnectionType(effective_connection_type));
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connection_thresholds[i].set_http_rtt(
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base::TimeDelta::FromMilliseconds(GetValueForVariationParam(
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params, connection_type_name + ".ThresholdMedianHttpRTTMsec",
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default_effective_connection_type_thresholds[i]
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.http_rtt()
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.InMilliseconds())));
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connection_thresholds[i].set_transport_rtt(
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base::TimeDelta::FromMilliseconds(GetValueForVariationParam(
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params, connection_type_name + ".ThresholdMedianTransportRTTMsec",
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default_effective_connection_type_thresholds[i]
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.transport_rtt()
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.InMilliseconds())));
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connection_thresholds[i].set_downstream_throughput_kbps(
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GetValueForVariationParam(
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params, connection_type_name + ".ThresholdMedianKbps",
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default_effective_connection_type_thresholds[i]
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.downstream_throughput_kbps()));
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DCHECK(i == 0 ||
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connection_thresholds[i].IsFaster(connection_thresholds[i - 1]));
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}
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}
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base::Optional<EffectiveConnectionType> GetForcedEffectiveConnectionType(
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const std::map<std::string, std::string>& params) {
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std::string forced_value = GetStringValueForVariationParamWithDefaultValue(
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params, kForceEffectiveConnectionType, "");
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base::Optional<EffectiveConnectionType> ect =
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GetEffectiveConnectionTypeForName(forced_value);
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DCHECK(forced_value.empty() || ect);
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return ect;
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}
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} // namespace
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NetworkQualityEstimatorParams::NetworkQualityEstimatorParams(
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const std::map<std::string, std::string>& params)
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: params_(params),
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throughput_min_requests_in_flight_(
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GetValueForVariationParam(params_,
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"throughput_min_requests_in_flight",
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5)),
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throughput_min_transfer_size_kilobytes_(
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GetValueForVariationParam(params_,
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"throughput_min_transfer_size_kilobytes",
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32)),
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weight_multiplier_per_second_(GetWeightMultiplierPerSecond(params_)),
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weight_multiplier_per_signal_strength_level_(
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GetDoubleValueForVariationParamWithDefaultValue(
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params_,
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"rssi_weight_per_signal_strength_level",
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1.0)),
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correlation_uma_logging_probability_(
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GetDoubleValueForVariationParamWithDefaultValue(
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params_,
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"correlation_logging_probability",
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0.01)),
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forced_effective_connection_type_(
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GetForcedEffectiveConnectionType(params_)),
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persistent_cache_reading_enabled_(
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GetPersistentCacheReadingEnabled(params_)),
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min_socket_watcher_notification_interval_(
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GetMinSocketWatcherNotificationInterval(params_)),
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lower_bound_http_rtt_transport_rtt_multiplier_(
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GetDoubleValueForVariationParamWithDefaultValue(
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params_,
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"lower_bound_http_rtt_transport_rtt_multiplier",
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-1)),
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upper_bound_http_rtt_transport_rtt_multiplier_(
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GetDoubleValueForVariationParamWithDefaultValue(
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params_,
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"upper_bound_http_rtt_transport_rtt_multiplier",
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-1)),
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http_rtt_transport_rtt_min_count_(
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GetValueForVariationParam(params_,
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"http_rtt_transport_rtt_min_count",
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5)),
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increase_in_transport_rtt_logging_interval_(
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base::TimeDelta::FromMillisecondsD(
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GetDoubleValueForVariationParamWithDefaultValue(
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params_,
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"increase_in_transport_rtt_logging_interval",
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10000))),
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recent_time_threshold_(base::TimeDelta::FromMillisecondsD(
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GetDoubleValueForVariationParamWithDefaultValue(
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params_,
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"recent_time_threshold",
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5000))),
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historical_time_threshold_(base::TimeDelta::FromMillisecondsD(
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GetDoubleValueForVariationParamWithDefaultValue(
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params_,
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"historical_time_threshold",
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60000))),
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hanging_request_duration_http_rtt_multiplier_(GetValueForVariationParam(
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params_,
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"hanging_request_duration_http_rtt_multiplier",
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5)),
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hanging_request_min_duration_(base::TimeDelta::FromMilliseconds(
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GetValueForVariationParam(params_,
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"hanging_request_min_duration_msec",
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3000))),
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add_default_platform_observations_(
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GetStringValueForVariationParamWithDefaultValue(
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params_,
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"add_default_platform_observations",
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"true") == "true"),
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socket_watchers_min_notification_interval_(
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base::TimeDelta::FromMilliseconds(GetValueForVariationParam(
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params_,
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"socket_watchers_min_notification_interval_msec",
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200))),
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use_small_responses_(false) {
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DCHECK_LE(0.0, correlation_uma_logging_probability_);
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DCHECK_GE(1.0, correlation_uma_logging_probability_);
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DCHECK(lower_bound_http_rtt_transport_rtt_multiplier_ == -1 ||
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lower_bound_http_rtt_transport_rtt_multiplier_ > 0);
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DCHECK(upper_bound_http_rtt_transport_rtt_multiplier_ == -1 ||
|
|
upper_bound_http_rtt_transport_rtt_multiplier_ > 0);
|
|
DCHECK(lower_bound_http_rtt_transport_rtt_multiplier_ == -1 ||
|
|
upper_bound_http_rtt_transport_rtt_multiplier_ == -1 ||
|
|
lower_bound_http_rtt_transport_rtt_multiplier_ <
|
|
upper_bound_http_rtt_transport_rtt_multiplier_);
|
|
|
|
const auto algorithm_it = params_.find("effective_connection_type_algorithm");
|
|
effective_connection_type_algorithm_ =
|
|
GetEffectiveConnectionTypeAlgorithmFromString(
|
|
algorithm_it == params_.end() ? std::string() : algorithm_it->second);
|
|
|
|
DCHECK_NE(EffectiveConnectionTypeAlgorithm::
|
|
EFFECTIVE_CONNECTION_TYPE_ALGORITHM_LAST,
|
|
effective_connection_type_algorithm_);
|
|
|
|
ObtainDefaultObservations(params_, default_observations_);
|
|
ObtainTypicalNetworkQualities(params_, typical_network_quality_);
|
|
ObtainConnectionThresholds(params_, connection_thresholds_);
|
|
}
|
|
|
|
NetworkQualityEstimatorParams::~NetworkQualityEstimatorParams() = default;
|
|
|
|
void NetworkQualityEstimatorParams::SetUseSmallResponsesForTesting(
|
|
bool use_small_responses) {
|
|
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
|
|
use_small_responses_ = use_small_responses;
|
|
}
|
|
|
|
bool NetworkQualityEstimatorParams::use_small_responses() const {
|
|
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
|
|
return use_small_responses_;
|
|
};
|
|
|
|
// static
|
|
NetworkQualityEstimatorParams::EffectiveConnectionTypeAlgorithm
|
|
NetworkQualityEstimatorParams::GetEffectiveConnectionTypeAlgorithmFromString(
|
|
const std::string& algorithm_param_value) {
|
|
// The default algorithm to be used if the algorithm value is not available
|
|
// through field trial parameters.
|
|
static const EffectiveConnectionTypeAlgorithm
|
|
kDefaultEffectiveConnectionTypeAlgorithm =
|
|
EffectiveConnectionTypeAlgorithm::HTTP_RTT_AND_DOWNSTREAM_THROUGHOUT;
|
|
|
|
if (algorithm_param_value.empty())
|
|
return kDefaultEffectiveConnectionTypeAlgorithm;
|
|
|
|
if (algorithm_param_value == "HttpRTTAndDownstreamThroughput") {
|
|
return EffectiveConnectionTypeAlgorithm::HTTP_RTT_AND_DOWNSTREAM_THROUGHOUT;
|
|
}
|
|
if (algorithm_param_value == "TransportRTTOrDownstreamThroughput") {
|
|
return EffectiveConnectionTypeAlgorithm::
|
|
TRANSPORT_RTT_OR_DOWNSTREAM_THROUGHOUT;
|
|
}
|
|
static_assert(
|
|
static_cast<int>(EffectiveConnectionTypeAlgorithm::
|
|
TRANSPORT_RTT_OR_DOWNSTREAM_THROUGHOUT) +
|
|
1 ==
|
|
static_cast<int>(EffectiveConnectionTypeAlgorithm::
|
|
EFFECTIVE_CONNECTION_TYPE_ALGORITHM_LAST),
|
|
"Not all algorithms are accounted for.");
|
|
|
|
NOTREACHED();
|
|
return kDefaultEffectiveConnectionTypeAlgorithm;
|
|
}
|
|
|
|
size_t NetworkQualityEstimatorParams::throughput_min_requests_in_flight()
|
|
const {
|
|
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
|
|
|
|
// If |use_small_responses_| is set to true for testing, then consider one
|
|
// request as sufficient for taking throughput sample.
|
|
return use_small_responses_ ? 1 : throughput_min_requests_in_flight_;
|
|
}
|
|
|
|
int64_t NetworkQualityEstimatorParams::GetThroughputMinTransferSizeBits()
|
|
const {
|
|
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
|
|
return static_cast<int64_t>(throughput_min_transfer_size_kilobytes_) * 8 *
|
|
1000;
|
|
}
|
|
|
|
// static
|
|
const char* NetworkQualityEstimatorParams::GetNameForConnectionType(
|
|
NetworkChangeNotifier::ConnectionType connection_type) {
|
|
return GetNameForConnectionTypeInternal(connection_type);
|
|
}
|
|
|
|
const nqe::internal::NetworkQuality&
|
|
NetworkQualityEstimatorParams::DefaultObservation(
|
|
NetworkChangeNotifier::ConnectionType type) const {
|
|
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
|
|
return default_observations_[type];
|
|
}
|
|
|
|
const nqe::internal::NetworkQuality&
|
|
NetworkQualityEstimatorParams::TypicalNetworkQuality(
|
|
EffectiveConnectionType type) const {
|
|
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
|
|
return typical_network_quality_[type];
|
|
}
|
|
|
|
const nqe::internal::NetworkQuality&
|
|
NetworkQualityEstimatorParams::ConnectionThreshold(
|
|
EffectiveConnectionType type) const {
|
|
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
|
|
return connection_thresholds_[type];
|
|
}
|
|
|
|
NetworkQualityEstimatorParams::EffectiveConnectionTypeAlgorithm
|
|
NetworkQualityEstimatorParams::GetEffectiveConnectionTypeAlgorithm() const {
|
|
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
|
|
return effective_connection_type_algorithm_;
|
|
}
|
|
|
|
} // namespace net
|