Specifications

VMware, Inc. 193
Chapter 12 Configuring Virtual Machines
 Reservation–GuaranteedCPUallocationforthisvirtualmachine.
 Limit–Upperlimitforthisvirtualmachine’sCPUallocation.Select
Unlimitedtospecifynoupperlimit.
Formoreinformationonsharevalues,seetheResourceManagementGuide.
4ClickOKtosaveyourchanges.
TheVirtualMachinePropertiesdialogboxcloses.
Advanced CPU Settings
TheAdvancedCPUResourcespanelletsyousetlow‐leveloptionsthatinvolve
schedulingthevirtualmachineprocessingtophysicalprocessorcoresand
hyperthreads.ThispaneldoesnotappearforvirtualmachinesinaDRSclusterorwhen
thehosthasonlyoneprocessorcoreandnohyperthreading.
VMwareESXServer
generallymanagesprocessorschedulingwell,evenwhen
hyperthreadingisenabled.Thesettingsonthispageareusefulonlyforfine‐grained
tweakingofcriticalvirtualmachines.
TheHyperthreadingSharingoptionprovidesdetailedcontroloverwhetheravirtual
machineshouldbescheduledtoshareaphysicalprocessorcore(assuming
hyperthreadingis
enabledonthehostatall).
TheSchedulingAffinityoptionallowsfine‐grainedcontroloverhowvirtualmachine
CPUsaredistributedacrossthehostʹsphysicalcores(andhyperthreadsif
hyperthreadingisenabled).
To change Advanced CPU settings
1ClicktheResourcestab.
2 SelectAdvancedCPUintheSettingslist.
N
OTEHyperthreadingtechnologyallowsasinglephysicalprocessortobehavelike
twologicalprocessors.Theprocessorcanruntwoindependentapplicationsatthesame
time.Whilehyperthreadingdoesnotdoubletheperformanceofasystem,itcan
increaseperformancebybetterutilizingidleresources.Fordetailedinformationabout
hyperthreadingandits
useinVMwareInfrastructure,seetheResourceManagement
Guide(chooseHelp>Manuals).