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

Class CpuSet

java.lang.Object

org.apache.druid.java.util.metrics.cgroups.CpuSet

public class CpuSet
extends Object

Collect CPU and memory data from cpuset cgroup files.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CpuSet.CpuSetMetric

Constructor Summary

Constructors

Constructor	Description
CpuSet(CgroupDiscoverer cgroupDiscoverer)

Method Summary

Modifier and Type	Method	Description
static int[]	parseStringRangeToIntArray(String line)	Parses the cpuset list format and outputs it as a list of CPUs.
CpuSet.CpuSetMetric	snapshot()	Take a snapshot of cpuset cgroup data

Methods inherited from class java.lang.Object

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

Constructor Details

CpuSet

public CpuSet(CgroupDiscoverer cgroupDiscoverer)

Method Details

snapshot

public CpuSet.CpuSetMetric snapshot()

Take a snapshot of cpuset cgroup data

Returns:

A snapshot with the data populated.

parseStringRangeToIntArray

public static int[] parseStringRangeToIntArray(String line)

Parses the cpuset list format and outputs it as a list of CPUs. Examples: 0-4,9 # bits 0, 1, 2, 3, 4, and 9 set # outputs [0, 1, 2, 3, 4, 9] 0-2,7,12-14 # bits 0, 1, 2, 7, 12, 13, and 14 set # outputs [0, 1, 2, 7, 12, 13, 14] This method also works fine for memory nodes. The format is identical in both cgroups v1 and v2, so this can be shared.

Parameters:

line - The list format cpu value

Returns:

the list of CPU IDs