lm::LoadMonitor::DriveStats Class Reference

Collects data about drive usage on the host. More...

Inheritance diagram for lm::LoadMonitor::DriveStats:

Public Member Functions
	DriveStats (void)
	Constructor.
virtual	~DriveStats (void)
	Destructor.
virtual bool	QueryData (LoadSample &target)
	Collect data and store them in the sample.
virtual bool	QueryData (HardwareDescription &target)
	Collect data and store their descriptions.
Private Attributes
int	kernel_version
	Kernel version code.
std::vector< std::pair< long, long > >	data
	Stats for the IDE drives.
unsigned long long	last_time
	Timestamp of the last measurement.
Data Structures
class	OneDriveStats
	Stores data about one disk drive from /proc/diskstats file. More...

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Detailed Description

Collects data about drive usage on the host.

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Constructor & Destructor Documentation

lm::LoadMonitor::DriveStats::DriveStats

(

void

)

Constructor.

lm::LoadMonitor::DriveStats::~DriveStats

(

void

)

[virtual]

Destructor.

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Member Function Documentation

bool lm::LoadMonitor::DriveStats::QueryData

(

HardwareDescription &

description

)

[virtual]

Collect data and store their descriptions.

This will read names of all IDE drives from the /proc/diskstats file. Works on kernel newer than 2.5.69.

Parameters:

description

Structure which will receive data collected by this provider.

Returns:

true on success, false otherwise.

Implements lm::LoadMonitor::StatsProvider.

bool lm::LoadMonitor::DriveStats::QueryData

(

LoadSample &

sample

)

[virtual]

Collect data and store them in the sample.

Reads data from the /proc/diskstats file. This file is available only on kernels newer than 2.5.69. For older kernels no data is available.

Parameters:

sample

Structure which will receive data collected by this provider.

Returns:

true on success, false otherwise.

Implements lm::LoadMonitor::StatsProvider.

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Field Documentation

std::vector< std::pair< long, long > > lm::LoadMonitor::DriveStats::data [private]

Stats for the IDE drives.

First item of the pair is number of sectors read, second is number of sectors written.

int lm::LoadMonitor::DriveStats::kernel_version [private]

Kernel version code.

unsigned long long lm::LoadMonitor::DriveStats::last_time [private]

Timestamp of the last measurement.

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

• LoadMonitor.h
• LoadMonitor.cpp

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