Class %SYSTEM.CPU

class %SYSTEM.CPU extends %RegisteredObject, %SYSTEM.Help

This class holds information about available processors. The number of threads (virtual or logical cpus), cores and chips always reflect the situation in the current partition or processor set.

Inventory

Parameters	Properties	Methods	Queries	Indices	ForeignKeys	Triggers
	14	4

Summary

Properties
Arch	InsideCgroup	MHz	MTEnabled
MTSupported	Model	PeriodUs	QuotaUs
Vendor	nChips	nCores	nCoresPerChip
nThreads	nThreadsPerCore

Methods
%AddToSaveSet	%ClassIsLatestVersion	%ClassName	%ConstructClone
%DispatchClassMethod	%DispatchGetModified	%DispatchGetProperty	%DispatchMethod
%DispatchSetModified	%DispatchSetMultidimProperty	%DispatchSetProperty	%Extends
%GetParameter	%IsA	%IsModified	%New
%NormalizeObject	%ObjectModified	%OnNew	%OriginalNamespace
%PackageName	%RemoveFromSaveSet	%SerializeObject	%SetModified
%ValidateObject	Dump	Help	Refresh

Properties

• property Arch as %String;

Architecture, eg: x86, Itanium, SPARC, PA-RISC

• property InsideCgroup as %Numeric;

Is IRIS running inside a cgroup

• property MHz as %Numeric;

Clock in MHz

• property MTEnabled as %Boolean;

Is Hardware Multi-Threading enabled? (eg: HyperThreading(Intel) or SMT(ppc))

• property MTSupported as %Boolean;

Is Hardware Multi-Threading supported?

• property Model as %String;

Chip model, eg: Pentium 4, POWER5

• property PeriodUs as %Numeric;

cgroup cfs period in us

• property QuotaUs as %Numeric;

cgroup cfs quota in us

• property Vendor as %String;

Chip vendor, eg: Intel, Sun, IBM

• property nChips as %Numeric;

Total number of chips

• property nCores as %Numeric;

Total number of cores

• property nCoresPerChip as %Numeric;

Number of cores per chip (physical property)

• property nThreads as %Numeric;

Total number of threads (virtual or logical cpus)

• property nThreadsPerCore as %Numeric;

Number of threads per core (physical property)

Methods

• method %OnNew() as %Status

This callback method is invoked by the %New method to provide notification that a new instance of an object is being created.
If this method returns an error then the object will not be created.
It is passed the arguments provided in the %New call. When customizing this method, override the arguments with whatever variables and types you expect to receive from %New(). For example, if you're going to call %New, passing 2 arguments, %OnNew's signature could be:
Method %OnNew(dob as %Date = "", name as %Name = "") as %Status If instead of returning a %Status code this returns an oref and this oref is a subclass of the current class then this oref will be the one returned to the caller of %New method.

• classmethod Dump()

Display CPU information

• method Refresh() as %Status

Force update and get new properties

Class Reference IRIS for UNIX 2024.1.2
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