mirror of
https://github.com/ton-blockchain/ton
synced 2025-02-12 11:12:16 +00:00
71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/*
|
|
This file is part of TON Blockchain Library.
|
|
|
|
TON Blockchain Library is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
TON Blockchain Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
Copyright 2017-2020 Telegram Systems LLP
|
|
*/
|
|
|
|
#include "RttStats.h"
|
|
#include "rldp.hpp"
|
|
#include <cmath>
|
|
|
|
namespace ton {
|
|
namespace rldp2 {
|
|
void RttStats::on_rtt_sample(double rtt_sample, double ack_delay, td::Timestamp now) {
|
|
if (rtt_sample < 0.001 || rtt_sample > 10) {
|
|
VLOG(RLDP_INFO) << "Suspicious rtt sample " << rtt_sample;
|
|
return;
|
|
}
|
|
if (ack_delay < -1e-9 || ack_delay > 10) {
|
|
VLOG(RLDP_INFO) << "Suspicious ack_delay " << ack_delay;
|
|
return;
|
|
}
|
|
rtt_sample = td::max(0.01, rtt_sample);
|
|
|
|
last_rtt = rtt_sample;
|
|
|
|
windowed_min_rtt_stat.add_event(rtt_sample, now.at());
|
|
auto windowed_min_rtt_sample = windowed_min_rtt_stat.get_stat(now.at()).get_stat();
|
|
if (windowed_min_rtt_sample) {
|
|
windowed_min_rtt = windowed_min_rtt_sample.value();
|
|
}
|
|
|
|
if (smoothed_rtt < 0) {
|
|
// ignore ack_delay just because
|
|
min_rtt = last_rtt;
|
|
smoothed_rtt = last_rtt;
|
|
rtt_var = last_rtt / 2;
|
|
} else {
|
|
if (rtt_sample < min_rtt) {
|
|
min_rtt = rtt_sample;
|
|
}
|
|
|
|
double adjusted_rtt = rtt_sample;
|
|
if (adjusted_rtt - ack_delay > min_rtt) {
|
|
adjusted_rtt -= ack_delay;
|
|
}
|
|
|
|
smoothed_rtt += (adjusted_rtt - smoothed_rtt) / 8;
|
|
double var = fabs(smoothed_rtt - adjusted_rtt);
|
|
rtt_var += (var - rtt_var) / 4;
|
|
}
|
|
|
|
if (td::Timestamp::in(smoothed_rtt, rtt_round_at).is_in_past(now)) {
|
|
rtt_round_at = now;
|
|
rtt_round++;
|
|
}
|
|
}
|
|
} // namespace rldp2
|
|
} // namespace ton
|