mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#include "RttStats.h"
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#include <cmath>
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namespace ton {
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namespace rldp2 {
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void RttStats::on_rtt_sample(double rtt_sample, double ack_delay, td::Timestamp now) {
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if (rtt_sample < 0.001 || rtt_sample > 10) {
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LOG(WARNING) << "Suspicious rtt sample " << rtt_sample;
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return;
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}
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if (ack_delay < -1e-9 || ack_delay > 10) {
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LOG(WARNING) << "Suspicious ack_delay " << ack_delay;
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return;
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}
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rtt_sample = td::max(0.01, rtt_sample);
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last_rtt = rtt_sample;
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windowed_min_rtt_stat.add_event(rtt_sample, now.at());
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auto windowed_min_rtt_sample = windowed_min_rtt_stat.get_stat(now.at()).get_stat();
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if (windowed_min_rtt_sample) {
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windowed_min_rtt = windowed_min_rtt_sample.value();
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}
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if (smoothed_rtt < 0) {
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// ignore ack_delay just because
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min_rtt = last_rtt;
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smoothed_rtt = last_rtt;
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rtt_var = last_rtt / 2;
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} else {
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if (rtt_sample < min_rtt) {
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min_rtt = rtt_sample;
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}
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double adjusted_rtt = rtt_sample;
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if (adjusted_rtt - ack_delay > min_rtt) {
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adjusted_rtt -= ack_delay;
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}
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smoothed_rtt += (adjusted_rtt - smoothed_rtt) / 8;
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double var = fabs(smoothed_rtt - adjusted_rtt);
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rtt_var += (var - rtt_var) / 4;
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}
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if (td::Timestamp::in(smoothed_rtt, rtt_round_at).is_in_past(now)) {
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rtt_round_at = now;
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rtt_round++;
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}
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}
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} // namespace rldp2
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} // namespace ton
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