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ACE_Basic_Stats Class Reference

Collect basic stats about a series of samples. More...

#include <Basic_Stats.h>

Inheritance diagram for ACE_Basic_Stats:

[legend]List of all members.

Public Methods
	ACE_Basic_Stats (void)
	Constructor.
ACE_UINT32	samples_count (void) const
	The number of samples received so far.
void	sample (ACE_UINT64 value)
	Record one sample.
void	accumulate (const ACE_Basic_Stats &rhs)
	Update the values to reflect the stats in rhs.
void	dump_results (const ACE_TCHAR *msg, ACE_UINT32 scale_factor) const
	Dump all the samples.
Private Attributes
ACE_UINT32	samples_count_
	The number of samples.
ACE_UINT64	min_
	The minimum value.
ACE_UINT32	min_at_
	The number of the sample that had the minimum value.
ACE_UINT64	max_
	The maximum value.
ACE_UINT32	max_at_
	The number of the sample that had the maximum value.
ACE_UINT64	sum_
	The sum of all the values.
ACE_UINT64	sum2_
	The sum of the square of all the values.

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Detailed Description

Collect basic stats about a series of samples.

Compute the average and standard deviation (aka jitter) for an arbitrary number of samples, using constant space. Normally used for latency statistics.

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Constructor & Destructor Documentation

ACE_INLINE ACE_Basic_Stats::ACE_Basic_Stats (  void    )

Constructor. The number of samples is pre-allocated, and cannot changes once the class is initialized.

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Member Function Documentation

void ACE_Basic_Stats::accumulate (  const ACE_Basic_Stats &    rhs )

Update the values to reflect the stats in rhs.

void ACE_Basic_Stats::dump_results (  const ACE_TCHAR *    msg, ACE_UINT32    scale_factor )  const

Dump all the samples. Prints out the results, using msg as a prefix for each message and scaling all the numbers by scale_factor. The latter is useful because high resolution timer samples are acquired in clock ticks, but often presented in microseconds.

ACE_INLINE void ACE_Basic_Stats::sample (  ACE_UINT64    value )

Record one sample.

ACE_INLINE ACE_UINT32 ACE_Basic_Stats::samples_count (  void    )  const

The number of samples received so far.

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Member Data Documentation

ACE_UINT64 ACE_Basic_Stats::max_ [private]

The maximum value.

ACE_UINT32 ACE_Basic_Stats::max_at_ [private]

The number of the sample that had the maximum value.

ACE_UINT64 ACE_Basic_Stats::min_ [private]

The minimum value.

ACE_UINT32 ACE_Basic_Stats::min_at_ [private]

The number of the sample that had the minimum value.

ACE_UINT32 ACE_Basic_Stats::samples_count_ [private]

The number of samples.

ACE_UINT64 ACE_Basic_Stats::sum2_ [private]

The sum of the square of all the values.

ACE_UINT64 ACE_Basic_Stats::sum_ [private]

The sum of all the values.

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The documentation for this class was generated from the following files:

• Basic_Stats.h
• Basic_Stats.cpp
• Basic_Stats.inl

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