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Table Of Contents
VMware Server User’s Guide
278 VMware, Inc.
4EntertheamountofmemoryinMBorGB,inmultiplesoffour.
5ClickOKtosaveyourchanges.
Using Two-Way Virtual Symmetric Multiprocessing
Forallsupportedconfigurationsof32bitand64bithostandguestoperatingsystems
runningonmultiprocessorhostmachines,VMwareServerprovidessupportfor
twowayVirtualSMP.VirtualSMPenablesyoutoassigntwovirtualprocessorstoa
virtualmachineonanyhostmachinethathasatleasttwo
logicalprocessors.
Thefollowingareallconsideredtohavetwoormorelogicalprocessors:
MultiprocessorhostwithtwoormorephysicalCPUs
SingleprocessorhostwithamulticoreCPU
Singleprocessorhostwithhyperthreadingenabled
GuestswithmorethantwovirtualprocessorsarenotsupportedinVMwareServer.
However,youcanpoweronandrunmultipledualprocessorvirtualmachines
concurrently.
ThevirtualmachineSummarytabdisplaysthenumberofvirtualprocessorscurrently
configuredforthevirtualmachine.Forinformationabout
howtosetthenumberof
processorsforthevirtualmachine,see“EditingVirtualProcessors”onpage 279.
Ifthehostisauniprocessormachineandisnothyperthreaded,assigningtwo
processorsisneithersupportednorrecommended.Awarningmessageappearswhen
youcreatethevirtualmachine.Youcandisregardthewarning
andassigntwo
processorstothevirtualmachine,butafteryoufinishcreatingthevirtualmachine,you
cannotpoweritonunlessyoumoveittoahostmachinewithatleasttwological
processors.
N
OTETomakesurethatthevirtualmachinecanboot,allocateatleastthe
RecommendedMinimumamountofmemory.
NOTEOnhyperthreadeduniprocessorhosts,performanceofvirtualmachineswith
VirtualSMPmightbesubpar.
N
OTEPerformancemightdegradesignificantlyinanovercommittedVirtualSMP
environmentifthetotalnumberofvirtualCPUsinallrunningvirtualmachines
exceedsthenumberofphysicalCPUsoradditionalapplicationsonthehostare
competingwithVMwareServerforCPUresources.