org.apache.pulsar.broker.loadbalance

Class LinuxInfoUtils

java.lang.Object

org.apache.pulsar.broker.loadbalance.LinuxInfoUtils

public class LinuxInfoUtils
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LinuxInfoUtils.NICUnit
static class	LinuxInfoUtils.NICUsageType
static class	LinuxInfoUtils.ResourceUsage
static class	LinuxInfoUtils.UsageUnit

Constructor Summary

Constructors

Constructor and Description
LinuxInfoUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	checkHasNicSpeeds() Check this VM has nic speed.
static double	getCpuUsageForCGroup() Get CGroup cpu usage.
static LinuxInfoUtils.ResourceUsage	getCpuUsageForEntireHost() Reads first line of /proc/stat to get total cpu usage.
static List<String>	getPhysicalNICs() Get all physical nic path.
static double	getTotalCpuLimit(boolean isCGroupsEnabled) Get total cpu limit.
static double	getTotalNicLimit(List<String> nics, LinuxInfoUtils.NICUnit nicUnit) Get all physical nic limit.
static double	getTotalNicUsage(List<String> nics, LinuxInfoUtils.NICUsageType type, LinuxInfoUtils.UsageUnit unit) Get all physical nic usage.
static boolean	isCGroupEnabled() Determine whether the OS enable CG Group.
static boolean	isLinux() Determine whether the OS is the linux kernel.

Methods inherited from class java.lang.Object

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

Constructor Detail

LinuxInfoUtils

public LinuxInfoUtils()

Method Detail

isLinux

public static boolean isLinux()

Determine whether the OS is the linux kernel.

Returns:

Whether the OS is the linux kernel

isCGroupEnabled

public static boolean isCGroupEnabled()

Determine whether the OS enable CG Group.

getTotalCpuLimit

public static double getTotalCpuLimit(boolean isCGroupsEnabled)

Get total cpu limit.

Parameters:

isCGroupsEnabled - Whether CGroup is enabled

Returns:

Total cpu limit

getCpuUsageForCGroup

public static double getCpuUsageForCGroup()

Get CGroup cpu usage.

Returns:

Cpu usage

getCpuUsageForEntireHost

public static LinuxInfoUtils.ResourceUsage getCpuUsageForEntireHost()

Reads first line of /proc/stat to get total cpu usage.

     cpu  user   nice system idle    iowait irq softirq steal guest guest_nice
     cpu  317808 128  58637  2503692 7634   0   13472   0     0     0
 

Line is split in "words", filtering the first. The sum of all numbers give the amount of cpu cycles used this far. Real CPU usage should equal the sum substracting the idle cycles, this would include iowait, irq and steal.

getTotalNicLimit

public static double getTotalNicLimit(List<String> nics,
                                      LinuxInfoUtils.NICUnit nicUnit)

Get all physical nic limit.

Parameters:

nics - All nic path

nicUnit - Nic speed unit

Returns:

Total nic limit

getTotalNicUsage

public static double getTotalNicUsage(List<String> nics,
                                      LinuxInfoUtils.NICUsageType type,
                                      LinuxInfoUtils.UsageUnit unit)

Get all physical nic usage.

Parameters:

nics - All nic path

type - Nic's usage type: transport, receive

unit - Nic usage unit

Returns:

Total nic usage

getPhysicalNICs

public static List<String> getPhysicalNICs()

Get all physical nic path.

Returns:

All physical nic path

checkHasNicSpeeds

public static boolean checkHasNicSpeeds()

Check this VM has nic speed.

Returns:

Whether the VM has nic speed