mirror of https://gitee.com/bigwinds/arangodb
99 lines
2.7 KiB
C++
99 lines
2.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Dr. Frank Celler
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef ARANGOD_STATISTICS_FIGURES_H
|
|
#define ARANGOD_STATISTICS_FIGURES_H 1
|
|
|
|
#include "Basics/Common.h"
|
|
|
|
namespace arangodb {
|
|
namespace basics {
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief vector generator
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
struct StatisticsVector {
|
|
StatisticsVector() : _value() {}
|
|
|
|
StatisticsVector& operator<<(double v) {
|
|
_value.push_back(v);
|
|
return *this;
|
|
}
|
|
|
|
std::vector<double> _value;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief a simple counter
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
struct StatisticsCounter {
|
|
StatisticsCounter() : _count(0) {}
|
|
|
|
void incCounter() { ++_count; }
|
|
|
|
void decCounter() { --_count; }
|
|
|
|
int64_t _count;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief a distribution with count, min, max, mean, and variance
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
struct StatisticsDistribution {
|
|
StatisticsDistribution() : _count(0), _total(0.0), _cuts(), _counts() {}
|
|
|
|
StatisticsDistribution(StatisticsVector const& dist)
|
|
: _count(0), _total(0.0), _cuts(dist._value), _counts() {
|
|
_counts.resize(_cuts.size() + 1);
|
|
}
|
|
|
|
void addFigure(double value) {
|
|
++_count;
|
|
_total += value;
|
|
|
|
std::vector<double>::iterator i = _cuts.begin();
|
|
std::vector<uint64_t>::iterator j = _counts.begin();
|
|
|
|
for (; i != _cuts.end(); ++i, ++j) {
|
|
if (value < *i) {
|
|
++(*j);
|
|
return;
|
|
}
|
|
}
|
|
|
|
++(*j);
|
|
}
|
|
|
|
uint64_t _count;
|
|
double _total;
|
|
std::vector<double> _cuts;
|
|
std::vector<uint64_t> _counts;
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|