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/**
* @file lltracesampler.h
* @brief Sampling object for collecting runtime statistics originating from lltrace.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2012, 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_LLTRACESAMPLER_H
#define LL_LLTRACESAMPLER_H
#include "stdtypes.h"
#include "llpreprocessor.h"
#include "lltrace.h"
namespace LLTrace
{
class LL_COMMON_API Sampler
{
public:
~Sampler();
void makePrimary();
void start();
void stop();
void resume();
void mergeFrom(const Sampler* other);
void reset();
bool isStarted() { return mIsStarted; }
F32 getSum(Stat<F32>& stat) { return stat.getAccumulator(mF32Stats).getSum(); }
F32 getMin(Stat<F32>& stat) { return stat.getAccumulator(mF32Stats).getMin(); }
F32 getMax(Stat<F32>& stat) { return stat.getAccumulator(mF32Stats).getMax(); }
F32 getMean(Stat<F32>& stat) { return stat.getAccumulator(mF32Stats).getMean(); }
S32 getSum(Stat<S32>& stat) { return stat.getAccumulator(mS32Stats).getSum(); }
S32 getMin(Stat<S32>& stat) { return stat.getAccumulator(mS32Stats).getMin(); }
S32 getMax(Stat<S32>& stat) { return stat.getAccumulator(mS32Stats).getMax(); }
S32 getMean(Stat<S32>& stat) { return stat.getAccumulator(mS32Stats).getMean(); }
F64 getSampleTime() { return mElapsedSeconds; }
private:
friend class ThreadTrace;
Sampler(class ThreadTrace* thread_trace);
// no copy
Sampler(const Sampler& other) {}
// returns data for current thread
class ThreadTrace* getThreadTrace();
//TODO: take snapshot at sampler start so we can simplify updates
//AccumulatorBuffer<StatAccumulator<F32> > mF32StatsStart;
//AccumulatorBuffer<StatAccumulator<S32> > mS32StatsStart;
//AccumulatorBuffer<TimerAccumulator> mStackTimersStart;
AccumulatorBuffer<StatAccumulator<F32> > mF32Stats;
AccumulatorBuffer<StatAccumulator<S32> > mS32Stats;
AccumulatorBuffer<TimerAccumulator> mStackTimers;
bool mIsStarted;
LLTimer mSamplingTimer;
F64 mElapsedSeconds;
ThreadTrace* mThreadTrace;
};
}
#endif // LL_LLTRACESAMPLER_H
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