contur::Statistics Class Reference

Tracks per-process burst history and EWMA burst prediction. More...

#include <statistics.h>

Public Member Functions
	Statistics (double alpha=0.5)
	Constructs statistics store.
	~Statistics ()
	Destroys statistics store.
	Statistics (const Statistics &)=delete
	Copy construction is disabled.
Statistics &	operator= (const Statistics &)=delete
	Copy assignment is disabled.
	Statistics (Statistics &&) noexcept
	Move-constructs statistics state.
Statistics &	operator= (Statistics &&) noexcept
	Move-assigns statistics state.
void	recordBurst (ProcessId pid, Tick burst)
	Records an observed CPU burst for the process.
Tick	predictedBurst (ProcessId pid) const noexcept
	Returns the current predicted burst (0 if unknown).
bool	hasPrediction (ProcessId pid) const noexcept
	Returns true if the process already has a prediction.
void	clear (ProcessId pid)
	Clears statistics for one process.
void	reset ()
	Clears statistics for all processes.
double	alpha () const noexcept
	Returns EWMA alpha in range (0, 1].

Private Attributes
std::unique_ptr< Impl >	impl_

Detailed Description

Tracks per-process burst history and EWMA burst prediction.

Definition at line 13 of file statistics.h.

Constructor & Destructor Documentation

Statistics() [1/3]

contur::Statistics::Statistics ( double alpha = 0.5 )

explicit

Constructs statistics store.

Parameters

alpha

EWMA smoothing coefficient in range (0, 1].

References alpha().

Referenced by operator=(), operator=(), Statistics(), and Statistics().

~Statistics()

contur::Statistics::~Statistics

(

)

Destroys statistics store.

Statistics() [2/3]

contur::Statistics::Statistics ( const Statistics & )

delete

Copy construction is disabled.

References Statistics().

Statistics() [3/3]

contur::Statistics::Statistics ( Statistics && )

noexcept

Move-constructs statistics state.

References Statistics().

Member Function Documentation

alpha()

double contur::Statistics::alpha ( ) const

nodiscardnoexcept

Returns EWMA alpha in range (0, 1].

References alpha().

Referenced by alpha(), and Statistics().

clear()

void contur::Statistics::clear

(

ProcessId

pid

)

Clears statistics for one process.

References clear().

Referenced by clear().

hasPrediction()

bool contur::Statistics::hasPrediction ( ProcessId pid ) const

nodiscardnoexcept

Returns true if the process already has a prediction.

References hasPrediction().

Referenced by hasPrediction().

operator=() [1/2]

Statistics & contur::Statistics::operator= ( const Statistics & )

delete

Copy assignment is disabled.

References Statistics().

operator=() [2/2]

Statistics & contur::Statistics::operator= ( Statistics && )

noexcept

Move-assigns statistics state.

References Statistics().

predictedBurst()

Tick contur::Statistics::predictedBurst ( ProcessId pid ) const

nodiscardnoexcept

Returns the current predicted burst (0 if unknown).

References predictedBurst().

Referenced by predictedBurst().

recordBurst()

void contur::Statistics::recordBurst	(	ProcessId	pid,
		Tick	burst )

Records an observed CPU burst for the process.

References recordBurst().

Referenced by recordBurst().

reset()

void contur::Statistics::reset

(

)

Clears statistics for all processes.

References reset().

Referenced by reset().

Member Data Documentation

impl_

std::unique_ptr<Impl> contur::Statistics::impl_

private

Definition at line 54 of file statistics.h.

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

• include/contur/scheduling/statistics.h