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//------------------------------------------------------------------------------
// Author: Andrey Kuznetsov
// Description: Latencies calculator
// Copyright (c) 2015 EPAM Systems
//------------------------------------------------------------------------------
/*
This file is part of Nfstrace.
Nfstrace is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 2 of the License.
Nfstrace 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Nfstrace. If not, see <http://www.gnu.org/licenses/>.
*/
//------------------------------------------------------------------------------
#ifndef LATENCIES_H
#define LATENCIES_H
//------------------------------------------------------------------------------
#include <cstdint>
#include <sys/time.h>
//------------------------------------------------------------------------------
namespace NST
{
namespace breakdown
{
/*!
* \brief Latencies calculates latencies
*/
class Latencies
{
public:
Latencies();
/*! Adds value of latency
* \param t - timeout
*/
void add(const timeval& t);
/*!
* \brief gets count of timeouts
* \return count of timeouts
*/
uint64_t get_count() const;
/*!
* \brief get_avg Gets average latency
* \return average timeout
*/
long double get_avg() const;
/*!
* \brief get_st_dev Gets latency dispertion
* \return timeout dispertion
*/
long double get_st_dev() const;
/*!
* \brief get_min Gets minimal value of latencies
* \return minimal latency
*/
const timeval& get_min() const;
/*!
* \brief get_min Gets maximal value of latencies
* \return maximal latency
*/
const timeval& get_max() const;
private:
void operator=(const Latencies&) = delete;
void set_range(const timeval& t);
timeval min;
timeval max;
uint64_t count;
long double avg;
long double m2;
};
/*!
* \brief to_sec Converts timeval to double
* \param val - time struct
* \return converted value
*/
long double to_sec(const timeval& val);
} // namespace breakdown
} // namespace NST
//------------------------------------------------------------------------------
#endif//LATENCIES_H
//------------------------------------------------------------------------------
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