LocDynamicInfo Class Reference

#include <LocDynamicInfo.hpp>

Collaboration diagram for LocDynamicInfo:

[legend]List of all members.

Public Member Functions
	LocDynamicInfo (LocStaticInfo &_lsi, float threshold)
bool	hadSignificantChange ()
long	getFreeRAM () const
long	getFreeSwap () const
long	getFsFree () const
long	getFilesFree () const
long	getFsTotal () const
long	getFilesTotal () const
const char *	getCpuUsage () const
Private Member Functions
void	update ()
void	testChange ()
string	strUtilization () const
Private Attributes
long	freeRAM
long	freeSwap
long	fsFree
long	filesFree
long	fsTotal
long	filesTotal
float	currCpuUsage
long	prevFreeRAM
long	prevFreeSwap
long	prevFsFree
long	prevFilesFree
long	prevFsTotal
long	prevFilesTotal
float	prevCpuUsage
float	threshold
LocStaticInfo &	lsi
CpuUsage &	cpuUsage

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Detailed Description

LocDynamicInfo - Collects system's dynamic information.

LocDynamicInfo queries the underlying OS for dynamic machine information, such as idle percentage of CPU, disk and memory. Currently, it only works in Linux, mainly due to the fact that there is no standardized way of getting this kind of information across different platforms.

Author:

Andrei Goldchleger

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Constructor & Destructor Documentation

LocDynamicInfo::LocDynamicInfo (  LocStaticInfo &  _lsi, float  threshold )

Builds a LocDynamicInfo object Parameters: _lsi  - Reference to a LOcalStaticInfo object(needed in order to calculate percentages of available resources). threshold  - percentage of change that, when applied to subjects being measured(such as CPU), makes a given change significant (that is, one that should be reported to other parts of the system)

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Member Function Documentation

const char* LocDynamicInfo::getCpuUsage (   )  const [inline]

Returns: total available CPU usage

long LocDynamicInfo::getFilesFree (   )  const [inline]

Returns: available filenodes

long LocDynamicInfo::getFilesTotal (   )  const [inline]

Returns: total available filenodes

long LocDynamicInfo::getFreeRAM (   )  const [inline]

Returns: free RAM

long LocDynamicInfo::getFreeSwap (   )  const [inline]

Returns: free swap

long LocDynamicInfo::getFsFree (   )  const [inline]

Returns: available disk space

long LocDynamicInfo::getFsTotal (   )  const [inline]

Returns: total available disk space (for the user executing the LRM)

bool LocDynamicInfo::hadSignificantChange (   )

Reports if a significant change in resource availability has ocurred. A significant change is considered to be any variation in resource availability (CPU,Phys Memory, Swap) that exceeds the threshold (the one set at construction time).

string LocDynamicInfo::strUtilization (   )  const [private]

get CPU utilization. Returns: CPU utilization as a string

void LocDynamicInfo::testChange (   )  [private]

Tests if a significant change happened.

void LocDynamicInfo::update (   )  [private]

Updates dynamic information.

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Member Data Documentation

CpuUsage& LocDynamicInfo::cpuUsage [private]

Reference to a CpuUsage measuring object

float LocDynamicInfo::currCpuUsage [private]

holds current averaged CPU utilization

long LocDynamicInfo::filesFree [private]

free File nodes in filesystem

long LocDynamicInfo::filesTotal [private]

total filenodes in filesystem

long LocDynamicInfo::freeRAM [private]

free RAM space

long LocDynamicInfo::freeSwap [private]

free swap space

long LocDynamicInfo::fsFree [private]

free disk space

long LocDynamicInfo::fsTotal [private]

total available disk space(for the user executing the LRM)

LocStaticInfo& LocDynamicInfo::lsi [private]

reference to static info (to calculate percentages)

float LocDynamicInfo::prevCpuUsage [private]

previously averaged CPU utilization

long LocDynamicInfo::prevFilesFree [private]

previously available filenodes

long LocDynamicInfo::prevFilesTotal [private]

previously available filenodes in the filesystem

long LocDynamicInfo::prevFreeRAM [private]

RAM availability at previous measurement

long LocDynamicInfo::prevFreeSwap [private]

swap memory availability at previous measurement

long LocDynamicInfo::prevFsFree [private]

free disk space at previous measurement

long LocDynamicInfo::prevFsTotal [private]

previously available disk space

float LocDynamicInfo::threshold [private]

percentage that makes a change significant

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

• LocDynamicInfo.hpp
• LocDynamicInfo.cpp

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