121 lines
2.7 KiB
C++
121 lines
2.7 KiB
C++
/**
|
|
* @file llstatsaccumulator.h
|
|
* @brief Class for accumulating statistics.
|
|
*
|
|
* $LicenseInfo:firstyear=2002&license=viewerlgpl$
|
|
* Second Life Viewer Source Code
|
|
* Copyright (C) 2010, Linden Research, Inc.
|
|
*
|
|
* This 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;
|
|
* version 2.1 of the License only.
|
|
*
|
|
* This 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 this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
|
|
* $/LicenseInfo$
|
|
*/
|
|
|
|
#ifndef LL_STATS_ACCUMULATOR_H
|
|
#define LL_STATS_ACCUMULATOR_H
|
|
#include "llsd.h"
|
|
|
|
class LLStatsAccumulator
|
|
{
|
|
public:
|
|
inline LLStatsAccumulator()
|
|
{
|
|
reset();
|
|
}
|
|
|
|
inline void push(F32 val)
|
|
{
|
|
if (mCountOfNextUpdatesToIgnore > 0)
|
|
{
|
|
mCountOfNextUpdatesToIgnore--;
|
|
return;
|
|
}
|
|
|
|
mCount++;
|
|
mSum += val;
|
|
mSumOfSquares += val * val;
|
|
if (mCount == 1 || val > mMaxValue)
|
|
{
|
|
mMaxValue = val;
|
|
}
|
|
if (mCount == 1 || val < mMinValue)
|
|
{
|
|
mMinValue = val;
|
|
}
|
|
}
|
|
|
|
inline F32 getSum() const
|
|
{
|
|
return mSum;
|
|
}
|
|
|
|
inline F32 getMean() const
|
|
{
|
|
return (mCount == 0) ? 0.f : ((F32)mSum) / mCount;
|
|
}
|
|
|
|
inline F32 getMinValue() const
|
|
{
|
|
return mMinValue;
|
|
}
|
|
|
|
inline F32 getMaxValue() const
|
|
{
|
|
return mMaxValue;
|
|
}
|
|
|
|
inline F32 getStdDev() const
|
|
{
|
|
const F32 mean = getMean();
|
|
return (mCount < 2) ? 0.f : sqrt(llmax(0.f, mSumOfSquares / mCount - (mean * mean)));
|
|
}
|
|
|
|
inline U32 getCount() const
|
|
{
|
|
return mCount;
|
|
}
|
|
|
|
inline void reset()
|
|
{
|
|
mCount = 0;
|
|
mSum = mSumOfSquares = 0.f;
|
|
mMinValue = 0.0f;
|
|
mMaxValue = 0.0f;
|
|
mCountOfNextUpdatesToIgnore = 0;
|
|
}
|
|
|
|
inline LLSD asLLSD() const
|
|
{
|
|
LLSD data;
|
|
data["mean"] = getMean();
|
|
data["std_dev"] = getStdDev();
|
|
data["count"] = (S32)mCount;
|
|
data["min"] = getMinValue();
|
|
data["max"] = getMaxValue();
|
|
return data;
|
|
}
|
|
|
|
private:
|
|
S32 mCount;
|
|
F32 mSum;
|
|
F32 mSumOfSquares;
|
|
F32 mMinValue;
|
|
F32 mMaxValue;
|
|
U32 mCountOfNextUpdatesToIgnore;
|
|
};
|
|
|
|
#endif
|