Package org.yamcs.parameter

Class DiskstatsParameterProducer

java.lang.Object

org.yamcs.parameter.DiskstatsParameterProducer

All Implemented Interfaces:

SystemParametersProducer

public class DiskstatsParameterProducer
extends Object
implements SystemParametersProducer

Generates parameters containing information about the disk IO, similarly with what the command iostat provides.

Works only on Linux, reads all the info from /proc/diskstats.

Constructor Summary

Constructors

Constructor	Description
DiskstatsParameterProducer(SystemParametersService sysParamsService)

Method Summary

Modifier and Type	Method	Description
int	getFrequency()	How often this producer should be called.
Collection<ParameterValue>	getSystemParameters(long gentime)	return the next bunch of parameter values.
static boolean	hasDisksStats()
long	uptime()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DiskstatsParameterProducer

public DiskstatsParameterProducer(SystemParametersService sysParamsService)
                           throws IOException

Throws:

IOException

Method Details

getSystemParameters

public Collection<ParameterValue> getSystemParameters(long gentime)

Description copied from interface: SystemParametersProducer

return the next bunch of parameter values.

The gentime is the mission time when the parameter collection started. The returning parameters can use this time to allow all parameters in one collection interval to be timestamped with the same time.

Specified by:

getSystemParameters in interface SystemParametersProducer

uptime

public long uptime()
            throws IOException

Throws:

IOException

getFrequency

public int getFrequency()

Description copied from interface: SystemParametersProducer

How often this producer should be called. This is a multiplier for the base frequency which is 1 second.

For example a value of 3 means call each 3 seconds)

Specified by:

getFrequency in interface SystemParametersProducer

Returns:

hasDisksStats

public static boolean hasDisksStats()