mirror of
https://github.com/ntop/ntopng.git
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70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
/*
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*
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* (C) 2013-20 - ntop.org
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include "ntop_includes.h"
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/* *************************************** */
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ThroughputStats::ThroughputStats() {
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resetStats();
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}
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/* *************************************** */
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void ThroughputStats::resetStats() {
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last_val = 0;
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thpt = 0;
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last_thpt = 0;
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thpt_trend = trend_unknown;
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last_update_time.tv_sec = 0, last_update_time.tv_usec = 0;
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}
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/* *************************************** */
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ThroughputStats::ThroughputStats(const ThroughputStats &thpts) {
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last_val = thpts.last_val;
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thpt = thpts.thpt;
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last_thpt = thpts.last_thpt;
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thpt_trend = thpts.thpt_trend;
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memcpy(&last_update_time, &thpts.last_update_time, sizeof(last_update_time));
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}
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/* *************************************** */
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void ThroughputStats::updateStats(struct timeval *tv, u_int64_t new_val) {
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if(last_update_time.tv_sec > 0 /* Waits at least two calls before computing the throughput */
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&& new_val >= last_val /* Protects against resets / wraps */) {
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float tdiff = Utils::msTimevalDiff(tv, &last_update_time);
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float new_thpt = ((float)((new_val - last_val) * 1000)) / (1 + tdiff);
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if(thpt < new_thpt) thpt_trend = trend_up;
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else if(thpt > new_thpt) thpt_trend = trend_down;
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else thpt_trend = trend_stable;
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last_thpt = thpt;
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thpt = new_thpt;
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}
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last_val = new_val;
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memcpy(&last_update_time, tv, sizeof(struct timeval));
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}
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/* *************************************** */
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