blob: 706224ce08b811f458316c07b681d6566764cfda [file] [log] [blame]
/*
* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "test/pc/e2e/stats_based_network_quality_metrics_reporter.h"
#include <cstdint>
#include <map>
#include <memory>
#include <set>
#include <string>
#include <type_traits>
#include <utility>
#include <vector>
#include "absl/strings/string_view.h"
#include "api/array_view.h"
#include "api/scoped_refptr.h"
#include "api/sequence_checker.h"
#include "api/stats/rtc_stats.h"
#include "api/stats/rtcstats_objects.h"
#include "api/test/metrics/metric.h"
#include "api/test/network_emulation/network_emulation_interfaces.h"
#include "api/test/network_emulation_manager.h"
#include "api/units/data_rate.h"
#include "api/units/timestamp.h"
#include "rtc_base/checks.h"
#include "rtc_base/event.h"
#include "rtc_base/ip_address.h"
#include "rtc_base/strings/string_builder.h"
#include "rtc_base/synchronization/mutex.h"
#include "rtc_base/system/no_unique_address.h"
#include "system_wrappers/include/field_trial.h"
#include "test/pc/e2e/metric_metadata_keys.h"
namespace webrtc {
namespace webrtc_pc_e2e {
namespace {
using ::webrtc::test::ImprovementDirection;
using ::webrtc::test::Unit;
using NetworkLayerStats =
StatsBasedNetworkQualityMetricsReporter::NetworkLayerStats;
constexpr TimeDelta kStatsWaitTimeout = TimeDelta::Seconds(1);
EmulatedNetworkStats PopulateStats(std::vector<EmulatedEndpoint*> endpoints,
NetworkEmulationManager* network_emulation) {
rtc::Event stats_loaded;
EmulatedNetworkStats stats;
network_emulation->GetStats(endpoints, [&](EmulatedNetworkStats s) {
stats = std::move(s);
stats_loaded.Set();
});
bool stats_received = stats_loaded.Wait(kStatsWaitTimeout);
RTC_CHECK(stats_received);
return stats;
}
std::map<rtc::IPAddress, std::string> PopulateIpToPeer(
const std::map<std::string, std::vector<EmulatedEndpoint*>>&
peer_endpoints) {
std::map<rtc::IPAddress, std::string> out;
for (const auto& entry : peer_endpoints) {
for (const EmulatedEndpoint* const endpoint : entry.second) {
RTC_CHECK(out.find(endpoint->GetPeerLocalAddress()) == out.end())
<< "Two peers can't share the same endpoint";
out.emplace(endpoint->GetPeerLocalAddress(), entry.first);
}
}
return out;
}
// Accumulates emulated network stats being executed on the network thread.
// When all stats are collected stores it in thread safe variable.
class EmulatedNetworkStatsAccumulator {
public:
// `expected_stats_count` - the number of calls to
// AddEndpointStats/AddUplinkStats/AddDownlinkStats the accumulator is going
// to wait. If called more than expected, the program will crash.
explicit EmulatedNetworkStatsAccumulator(size_t expected_stats_count)
: not_collected_stats_count_(expected_stats_count) {
RTC_DCHECK_GE(not_collected_stats_count_, 0);
if (not_collected_stats_count_ == 0) {
all_stats_collected_.Set();
}
sequence_checker_.Detach();
}
// Has to be executed on network thread.
void AddEndpointStats(std::string peer_name, EmulatedNetworkStats stats) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
n_stats_[peer_name].endpoints_stats = std::move(stats);
DecrementNotCollectedStatsCount();
}
// Has to be executed on network thread.
void AddUplinkStats(std::string peer_name, EmulatedNetworkNodeStats stats) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
n_stats_[peer_name].uplink_stats = std::move(stats);
DecrementNotCollectedStatsCount();
}
// Has to be executed on network thread.
void AddDownlinkStats(std::string peer_name, EmulatedNetworkNodeStats stats) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
n_stats_[peer_name].downlink_stats = std::move(stats);
DecrementNotCollectedStatsCount();
}
// Can be executed on any thread.
// Returns true if count down was completed and false if timeout elapsed
// before.
bool Wait(TimeDelta timeout) { return all_stats_collected_.Wait(timeout); }
// Can be called once. Returns all collected stats by moving underlying
// object.
std::map<std::string, NetworkLayerStats> ReleaseStats() {
RTC_DCHECK(!stats_released_);
stats_released_ = true;
MutexLock lock(&mutex_);
return std::move(stats_);
}
private:
void DecrementNotCollectedStatsCount() {
RTC_DCHECK_RUN_ON(&sequence_checker_);
RTC_CHECK_GT(not_collected_stats_count_, 0)
<< "All stats are already collected";
not_collected_stats_count_--;
if (not_collected_stats_count_ == 0) {
MutexLock lock(&mutex_);
stats_ = std::move(n_stats_);
all_stats_collected_.Set();
}
}
RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_;
size_t not_collected_stats_count_ RTC_GUARDED_BY(sequence_checker_);
// Collected on the network thread. Moved into `stats_` after all stats are
// collected.
std::map<std::string, NetworkLayerStats> n_stats_
RTC_GUARDED_BY(sequence_checker_);
rtc::Event all_stats_collected_;
Mutex mutex_;
std::map<std::string, NetworkLayerStats> stats_ RTC_GUARDED_BY(mutex_);
bool stats_released_ = false;
};
} // namespace
StatsBasedNetworkQualityMetricsReporter::
StatsBasedNetworkQualityMetricsReporter(
std::map<std::string, std::vector<EmulatedEndpoint*>> peer_endpoints,
NetworkEmulationManager* network_emulation,
test::MetricsLogger* metrics_logger)
: collector_(std::move(peer_endpoints), network_emulation),
clock_(network_emulation->time_controller()->GetClock()),
metrics_logger_(metrics_logger) {
RTC_CHECK(metrics_logger_);
}
StatsBasedNetworkQualityMetricsReporter::NetworkLayerStatsCollector::
NetworkLayerStatsCollector(
std::map<std::string, std::vector<EmulatedEndpoint*>> peer_endpoints,
NetworkEmulationManager* network_emulation)
: peer_endpoints_(std::move(peer_endpoints)),
ip_to_peer_(PopulateIpToPeer(peer_endpoints_)),
network_emulation_(network_emulation) {}
void StatsBasedNetworkQualityMetricsReporter::NetworkLayerStatsCollector::
Start() {
MutexLock lock(&mutex_);
// Check that network stats are clean before test execution.
for (const auto& entry : peer_endpoints_) {
EmulatedNetworkStats stats =
PopulateStats(entry.second, network_emulation_);
RTC_CHECK_EQ(stats.overall_outgoing_stats.packets_sent, 0);
RTC_CHECK_EQ(stats.overall_incoming_stats.packets_received, 0);
}
}
void StatsBasedNetworkQualityMetricsReporter::NetworkLayerStatsCollector::
AddPeer(absl::string_view peer_name,
std::vector<EmulatedEndpoint*> endpoints,
std::vector<EmulatedNetworkNode*> uplink,
std::vector<EmulatedNetworkNode*> downlink) {
MutexLock lock(&mutex_);
// When new peer is added not in the constructor, don't check if it has empty
// stats, because their endpoint could be used for traffic before.
peer_endpoints_.emplace(peer_name, std::move(endpoints));
peer_uplinks_.emplace(peer_name, std::move(uplink));
peer_downlinks_.emplace(peer_name, std::move(downlink));
for (const EmulatedEndpoint* const endpoint : endpoints) {
RTC_CHECK(ip_to_peer_.find(endpoint->GetPeerLocalAddress()) ==
ip_to_peer_.end())
<< "Two peers can't share the same endpoint";
ip_to_peer_.emplace(endpoint->GetPeerLocalAddress(), peer_name);
}
}
std::map<std::string, NetworkLayerStats>
StatsBasedNetworkQualityMetricsReporter::NetworkLayerStatsCollector::
GetStats() {
MutexLock lock(&mutex_);
EmulatedNetworkStatsAccumulator stats_accumulator(
peer_endpoints_.size() + peer_uplinks_.size() + peer_downlinks_.size());
for (const auto& entry : peer_endpoints_) {
network_emulation_->GetStats(
entry.second, [&stats_accumulator,
peer = entry.first](EmulatedNetworkStats s) mutable {
stats_accumulator.AddEndpointStats(std::move(peer), std::move(s));
});
}
for (const auto& entry : peer_uplinks_) {
network_emulation_->GetStats(
entry.second, [&stats_accumulator,
peer = entry.first](EmulatedNetworkNodeStats s) mutable {
stats_accumulator.AddUplinkStats(std::move(peer), std::move(s));
});
}
for (const auto& entry : peer_downlinks_) {
network_emulation_->GetStats(
entry.second, [&stats_accumulator,
peer = entry.first](EmulatedNetworkNodeStats s) mutable {
stats_accumulator.AddDownlinkStats(std::move(peer), std::move(s));
});
}
bool stats_collected = stats_accumulator.Wait(kStatsWaitTimeout);
RTC_CHECK(stats_collected);
std::map<std::string, NetworkLayerStats> peer_to_stats =
stats_accumulator.ReleaseStats();
std::map<std::string, std::vector<std::string>> sender_to_receivers;
for (const auto& entry : peer_endpoints_) {
const std::string& peer_name = entry.first;
const NetworkLayerStats& stats = peer_to_stats[peer_name];
for (const auto& income_stats_entry :
stats.endpoints_stats.incoming_stats_per_source) {
const rtc::IPAddress& source_ip = income_stats_entry.first;
auto it = ip_to_peer_.find(source_ip);
if (it == ip_to_peer_.end()) {
// Source IP is unknown for this collector, so will be skipped.
continue;
}
sender_to_receivers[it->second].push_back(peer_name);
}
}
for (auto& entry : peer_to_stats) {
const std::vector<std::string>& receivers =
sender_to_receivers[entry.first];
entry.second.receivers =
std::set<std::string>(receivers.begin(), receivers.end());
}
return peer_to_stats;
}
void StatsBasedNetworkQualityMetricsReporter::AddPeer(
absl::string_view peer_name,
std::vector<EmulatedEndpoint*> endpoints) {
collector_.AddPeer(peer_name, std::move(endpoints), /*uplink=*/{},
/*downlink=*/{});
}
void StatsBasedNetworkQualityMetricsReporter::AddPeer(
absl::string_view peer_name,
std::vector<EmulatedEndpoint*> endpoints,
std::vector<EmulatedNetworkNode*> uplink,
std::vector<EmulatedNetworkNode*> downlink) {
collector_.AddPeer(peer_name, std::move(endpoints), std::move(uplink),
std::move(downlink));
}
void StatsBasedNetworkQualityMetricsReporter::Start(
absl::string_view test_case_name,
const TrackIdStreamInfoMap* reporter_helper) {
test_case_name_ = std::string(test_case_name);
collector_.Start();
start_time_ = clock_->CurrentTime();
}
void StatsBasedNetworkQualityMetricsReporter::OnStatsReports(
absl::string_view pc_label,
const rtc::scoped_refptr<const RTCStatsReport>& report) {
PCStats cur_stats;
auto inbound_stats = report->GetStatsOfType<RTCInboundRtpStreamStats>();
for (const auto& stat : inbound_stats) {
cur_stats.payload_received +=
DataSize::Bytes(stat->bytes_received.value_or(0ul) +
stat->header_bytes_received.value_or(0ul));
}
auto outbound_stats = report->GetStatsOfType<RTCOutboundRtpStreamStats>();
for (const auto& stat : outbound_stats) {
cur_stats.payload_sent += DataSize::Bytes(
stat->bytes_sent.value_or(0ul) + stat->header_bytes_sent.value_or(0ul));
}
auto candidate_pairs_stats = report->GetStatsOfType<RTCTransportStats>();
for (const auto& stat : candidate_pairs_stats) {
cur_stats.total_received +=
DataSize::Bytes(stat->bytes_received.value_or(0ul));
cur_stats.total_sent += DataSize::Bytes(stat->bytes_sent.value_or(0ul));
cur_stats.packets_received += stat->packets_received.value_or(0ul);
cur_stats.packets_sent += stat->packets_sent.value_or(0ul);
}
MutexLock lock(&mutex_);
pc_stats_[std::string(pc_label)] = cur_stats;
}
void StatsBasedNetworkQualityMetricsReporter::StopAndReportResults() {
Timestamp end_time = clock_->CurrentTime();
std::map<std::string, NetworkLayerStats> stats = collector_.GetStats();
for (const auto& entry : stats) {
LogNetworkLayerStats(entry.first, entry.second);
}
MutexLock lock(&mutex_);
for (const auto& pair : pc_stats_) {
auto it = stats.find(pair.first);
RTC_CHECK(it != stats.end())
<< "Peer name used for PeerConnection stats collection and peer name "
"used for endpoints naming doesn't match. No endpoints found for "
"peer "
<< pair.first;
const NetworkLayerStats& network_layer_stats = it->second;
int64_t total_packets_received = 0;
bool found = false;
for (const auto& dest_peer : network_layer_stats.receivers) {
auto pc_stats_it = pc_stats_.find(dest_peer);
if (pc_stats_it == pc_stats_.end()) {
continue;
}
found = true;
total_packets_received += pc_stats_it->second.packets_received;
}
int64_t packet_loss = -1;
if (found) {
packet_loss = pair.second.packets_sent - total_packets_received;
}
ReportStats(pair.first, pair.second, network_layer_stats, packet_loss,
end_time);
}
}
void StatsBasedNetworkQualityMetricsReporter::ReportStats(
const std::string& pc_label,
const PCStats& pc_stats,
const NetworkLayerStats& network_layer_stats,
int64_t packet_loss,
const Timestamp& end_time) {
// TODO(bugs.webrtc.org/14757): Remove kExperimentalTestNameMetadataKey.
std::map<std::string, std::string> metric_metadata{
{MetricMetadataKey::kPeerMetadataKey, pc_label},
{MetricMetadataKey::kExperimentalTestNameMetadataKey, test_case_name_}};
metrics_logger_->LogSingleValueMetric(
"bytes_discarded_no_receiver", GetTestCaseName(pc_label),
network_layer_stats.endpoints_stats.overall_incoming_stats
.bytes_discarded_no_receiver.bytes(),
Unit::kBytes, ImprovementDirection::kNeitherIsBetter, metric_metadata);
metrics_logger_->LogSingleValueMetric(
"packets_discarded_no_receiver", GetTestCaseName(pc_label),
network_layer_stats.endpoints_stats.overall_incoming_stats
.packets_discarded_no_receiver,
Unit::kUnitless, ImprovementDirection::kNeitherIsBetter, metric_metadata);
metrics_logger_->LogSingleValueMetric(
"payload_bytes_received", GetTestCaseName(pc_label),
pc_stats.payload_received.bytes(), Unit::kBytes,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
metrics_logger_->LogSingleValueMetric(
"payload_bytes_sent", GetTestCaseName(pc_label),
pc_stats.payload_sent.bytes(), Unit::kBytes,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
metrics_logger_->LogSingleValueMetric(
"bytes_sent", GetTestCaseName(pc_label), pc_stats.total_sent.bytes(),
Unit::kBytes, ImprovementDirection::kNeitherIsBetter, metric_metadata);
metrics_logger_->LogSingleValueMetric(
"packets_sent", GetTestCaseName(pc_label), pc_stats.packets_sent,
Unit::kUnitless, ImprovementDirection::kNeitherIsBetter, metric_metadata);
metrics_logger_->LogSingleValueMetric(
"average_send_rate", GetTestCaseName(pc_label),
(pc_stats.total_sent / (end_time - start_time_)).kbps<double>(),
Unit::kKilobitsPerSecond, ImprovementDirection::kNeitherIsBetter,
metric_metadata);
metrics_logger_->LogSingleValueMetric(
"bytes_received", GetTestCaseName(pc_label),
pc_stats.total_received.bytes(), Unit::kBytes,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
metrics_logger_->LogSingleValueMetric(
"packets_received", GetTestCaseName(pc_label), pc_stats.packets_received,
Unit::kUnitless, ImprovementDirection::kNeitherIsBetter, metric_metadata);
metrics_logger_->LogSingleValueMetric(
"average_receive_rate", GetTestCaseName(pc_label),
(pc_stats.total_received / (end_time - start_time_)).kbps<double>(),
Unit::kKilobitsPerSecond, ImprovementDirection::kNeitherIsBetter,
metric_metadata);
metrics_logger_->LogSingleValueMetric(
"sent_packets_loss", GetTestCaseName(pc_label), packet_loss,
Unit::kUnitless, ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
std::string StatsBasedNetworkQualityMetricsReporter::GetTestCaseName(
absl::string_view network_label) const {
rtc::StringBuilder builder;
builder << test_case_name_ << "/" << network_label.data();
return builder.str();
}
void StatsBasedNetworkQualityMetricsReporter::LogNetworkLayerStats(
const std::string& peer_name,
const NetworkLayerStats& stats) const {
DataRate average_send_rate =
stats.endpoints_stats.overall_outgoing_stats.packets_sent >= 2
? stats.endpoints_stats.overall_outgoing_stats.AverageSendRate()
: DataRate::Zero();
DataRate average_receive_rate =
stats.endpoints_stats.overall_incoming_stats.packets_received >= 2
? stats.endpoints_stats.overall_incoming_stats.AverageReceiveRate()
: DataRate::Zero();
// TODO(bugs.webrtc.org/14757): Remove kExperimentalTestNameMetadataKey.
std::map<std::string, std::string> metric_metadata{
{MetricMetadataKey::kPeerMetadataKey, peer_name},
{MetricMetadataKey::kExperimentalTestNameMetadataKey, test_case_name_}};
rtc::StringBuilder log;
log << "Raw network layer statistic for [" << peer_name << "]:\n"
<< "Local IPs:\n";
for (size_t i = 0; i < stats.endpoints_stats.local_addresses.size(); ++i) {
log << " " << stats.endpoints_stats.local_addresses[i].ToString() << "\n";
}
if (!stats.endpoints_stats.overall_outgoing_stats.sent_packets_size
.IsEmpty()) {
metrics_logger_->LogMetric(
"sent_packets_size", GetTestCaseName(peer_name),
stats.endpoints_stats.overall_outgoing_stats.sent_packets_size,
Unit::kBytes, ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
if (!stats.endpoints_stats.overall_incoming_stats.received_packets_size
.IsEmpty()) {
metrics_logger_->LogMetric(
"received_packets_size", GetTestCaseName(peer_name),
stats.endpoints_stats.overall_incoming_stats.received_packets_size,
Unit::kBytes, ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
if (!stats.endpoints_stats.overall_incoming_stats
.packets_discarded_no_receiver_size.IsEmpty()) {
metrics_logger_->LogMetric(
"packets_discarded_no_receiver_size", GetTestCaseName(peer_name),
stats.endpoints_stats.overall_incoming_stats
.packets_discarded_no_receiver_size,
Unit::kBytes, ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
if (!stats.endpoints_stats.sent_packets_queue_wait_time_us.IsEmpty()) {
metrics_logger_->LogMetric(
"sent_packets_queue_wait_time_us", GetTestCaseName(peer_name),
stats.endpoints_stats.sent_packets_queue_wait_time_us, Unit::kUnitless,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
log << "Send statistic:\n"
<< " packets: "
<< stats.endpoints_stats.overall_outgoing_stats.packets_sent << " bytes: "
<< stats.endpoints_stats.overall_outgoing_stats.bytes_sent.bytes()
<< " avg_rate (bytes/sec): " << average_send_rate.bytes_per_sec()
<< " avg_rate (bps): " << average_send_rate.bps() << "\n"
<< "Send statistic per destination:\n";
for (const auto& entry :
stats.endpoints_stats.outgoing_stats_per_destination) {
DataRate source_average_send_rate = entry.second.packets_sent >= 2
? entry.second.AverageSendRate()
: DataRate::Zero();
log << "(" << entry.first.ToString() << "):\n"
<< " packets: " << entry.second.packets_sent
<< " bytes: " << entry.second.bytes_sent.bytes()
<< " avg_rate (bytes/sec): " << source_average_send_rate.bytes_per_sec()
<< " avg_rate (bps): " << source_average_send_rate.bps() << "\n";
if (!entry.second.sent_packets_size.IsEmpty()) {
metrics_logger_->LogMetric(
"sent_packets_size",
GetTestCaseName(peer_name + "/" + entry.first.ToString()),
entry.second.sent_packets_size, Unit::kBytes,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
}
if (!stats.uplink_stats.packet_transport_time.IsEmpty()) {
log << "[Debug stats] packet_transport_time=("
<< stats.uplink_stats.packet_transport_time.GetAverage() << ", "
<< stats.uplink_stats.packet_transport_time.GetStandardDeviation()
<< ")\n";
metrics_logger_->LogMetric(
"uplink_packet_transport_time", GetTestCaseName(peer_name),
stats.uplink_stats.packet_transport_time, Unit::kMilliseconds,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
if (!stats.uplink_stats.size_to_packet_transport_time.IsEmpty()) {
log << "[Debug stats] size_to_packet_transport_time=("
<< stats.uplink_stats.size_to_packet_transport_time.GetAverage() << ", "
<< stats.uplink_stats.size_to_packet_transport_time
.GetStandardDeviation()
<< ")\n";
metrics_logger_->LogMetric(
"uplink_size_to_packet_transport_time", GetTestCaseName(peer_name),
stats.uplink_stats.size_to_packet_transport_time, Unit::kUnitless,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
log << "Receive statistic:\n"
<< " packets: "
<< stats.endpoints_stats.overall_incoming_stats.packets_received
<< " bytes: "
<< stats.endpoints_stats.overall_incoming_stats.bytes_received.bytes()
<< " avg_rate (bytes/sec): " << average_receive_rate.bytes_per_sec()
<< " avg_rate (bps): " << average_receive_rate.bps() << "\n"
<< "Receive statistic per source:\n";
for (const auto& entry : stats.endpoints_stats.incoming_stats_per_source) {
DataRate source_average_receive_rate =
entry.second.packets_received >= 2 ? entry.second.AverageReceiveRate()
: DataRate::Zero();
log << "(" << entry.first.ToString() << "):\n"
<< " packets: " << entry.second.packets_received
<< " bytes: " << entry.second.bytes_received.bytes()
<< " avg_rate (bytes/sec): "
<< source_average_receive_rate.bytes_per_sec()
<< " avg_rate (bps): " << source_average_receive_rate.bps() << "\n";
if (!entry.second.received_packets_size.IsEmpty()) {
metrics_logger_->LogMetric(
"received_packets_size",
GetTestCaseName(peer_name + "/" + entry.first.ToString()),
entry.second.received_packets_size, Unit::kBytes,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
if (!entry.second.packets_discarded_no_receiver_size.IsEmpty()) {
metrics_logger_->LogMetric(
"packets_discarded_no_receiver_size",
GetTestCaseName(peer_name + "/" + entry.first.ToString()),
entry.second.packets_discarded_no_receiver_size, Unit::kBytes,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
}
if (!stats.downlink_stats.packet_transport_time.IsEmpty()) {
log << "[Debug stats] packet_transport_time=("
<< stats.downlink_stats.packet_transport_time.GetAverage() << ", "
<< stats.downlink_stats.packet_transport_time.GetStandardDeviation()
<< ")\n";
metrics_logger_->LogMetric(
"downlink_packet_transport_time", GetTestCaseName(peer_name),
stats.downlink_stats.packet_transport_time, Unit::kMilliseconds,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
if (!stats.downlink_stats.size_to_packet_transport_time.IsEmpty()) {
log << "[Debug stats] size_to_packet_transport_time=("
<< stats.downlink_stats.size_to_packet_transport_time.GetAverage()
<< ", "
<< stats.downlink_stats.size_to_packet_transport_time
.GetStandardDeviation()
<< ")\n";
metrics_logger_->LogMetric(
"downlink_size_to_packet_transport_time", GetTestCaseName(peer_name),
stats.downlink_stats.size_to_packet_transport_time, Unit::kUnitless,
ImprovementDirection::kNeitherIsBetter, metric_metadata);
}
RTC_LOG(LS_INFO) << log.str();
}
} // namespace webrtc_pc_e2e
} // namespace webrtc