Package org.apache.druid.java.util.metrics

Class CgroupCpuMonitor

java.lang.Object

org.apache.druid.java.util.metrics.AbstractMonitor

org.apache.druid.java.util.metrics.FeedDefiningMonitor

org.apache.druid.java.util.metrics.CgroupCpuMonitor

All Implemented Interfaces:

Monitor

public class CgroupCpuMonitor
extends FeedDefiningMonitor

Field Summary

Fields inherited from class org.apache.druid.java.util.metrics.FeedDefiningMonitor

DEFAULT_METRICS_FEED, feed

Constructor Summary

Constructors

Constructor	Description
CgroupCpuMonitor()
CgroupCpuMonitor(Map<String,String[]> dimensions)
CgroupCpuMonitor(Map<String,String[]> dimensions, String feed)
CgroupCpuMonitor(CgroupDiscoverer cgroupDiscoverer, Map<String,String[]> dimensions, String feed)

Method Summary

Modifier and Type	Method	Description
static double	computeProcessorQuota(long quotaUs, long periodUs)	Calculates the total cores allocated through quotas.
boolean	doMonitor(ServiceEmitter emitter)

Methods inherited from class org.apache.druid.java.util.metrics.FeedDefiningMonitor

builder

Methods inherited from class org.apache.druid.java.util.metrics.AbstractMonitor

isStarted, monitor, start, stop

Methods inherited from class java.lang.Object

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

Constructor Detail

CgroupCpuMonitor

public CgroupCpuMonitor(CgroupDiscoverer cgroupDiscoverer,
                        Map<String,String[]> dimensions,
                        String feed)

CgroupCpuMonitor

public CgroupCpuMonitor(Map<String,String[]> dimensions,
                        String feed)

CgroupCpuMonitor

public CgroupCpuMonitor(Map<String,String[]> dimensions)

CgroupCpuMonitor

public CgroupCpuMonitor()

Method Detail

doMonitor

public boolean doMonitor(ServiceEmitter emitter)

Specified by:

doMonitor in class AbstractMonitor

computeProcessorQuota

public static double computeProcessorQuota(long quotaUs,
                                           long periodUs)

Calculates the total cores allocated through quotas. A negative value indicates that no quota has been specified. We use -1 because that's the default value used in the cgroup.

Parameters:

quotaUs - the cgroup quota value.

periodUs - the cgroup period value.

Returns:

the calculated processor quota, -1 if no quota or period set.