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// -*- C++ -*-
//==========================================================================
/**
* @file Throughput_Stats.h
*
* @author David L. Levine
*/
//==========================================================================
#ifndef ACE_THROUGHPUT_STATS_H
#define ACE_THROUGHPUT_STATS_H
#include /**/ "ace/pre.h"
#include /**/ "ace/ACE_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Basic_Stats.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
/// A simple class to make throughput and latency analysis.
/**
*
* Keep the relevant information to perform throughput and latency
* analysis, including:
* -# Minimum, Average and Maximum latency
* -# Jitter for the latency
* -# Linear regression for throughput
* -# Accumulate results from several samples to obtain aggregated
* results, across several threads or experiments.
*
* @todo The idea behind this class was to use linear regression to
* determine if the throughput was linear or exhibited jitter.
* Unfortunately it never worked quite right, so only average
* throughput is computed.
*/
class ACE_Export ACE_Throughput_Stats : public ACE_Basic_Stats
{
public:
/// Constructor
ACE_Throughput_Stats (void);
/// Store one sample
void sample (ACE_UINT64 throughput, ACE_UINT64 latency);
/// Update the values to reflect the stats in @a throughput
void accumulate (const ACE_Throughput_Stats &throughput);
/// Print down the stats
void dump_results (const ACE_TCHAR* msg, scale_factor_type scale_factor);
/// Dump the average throughput stats.
static void dump_throughput (const ACE_TCHAR *msg,
scale_factor_type scale_factor,
ACE_UINT64 elapsed_time,
ACE_UINT32 samples_count);
private:
/// The last throughput measurement.
ACE_UINT64 throughput_last_;
};
ACE_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* ! ACE_THROUGHPUT_STATS_H */
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