A physical processor is the same as a processor package or a socket. It can consist of one or more logical processors.Ī physical processor can consist of one or more cores. The following definitions apply to the terms used in this article:Ī thread or logical processor is one logical computing engine from the perspective of SQL Server, the operating system, an application, or a driver.Ī core is a processor unit. When the mapping of cores to logical processors is: A core is mapped to one or two logical processors.One to many, it represents a multi-core chip installed in the socket.One to one, it represents a single-core chip installed in the socket.One to zero, it represents an empty socket.A socket is mapped to zero or more cores.Zero to many, it represents the absence of virtual machine on the host system.One to many, it represents an overcommit.One to zero, it represents an unbound logical processor not used by the guest operating systems.When the mapping of virtual processors to logical processors is: Zero or one virtual processor is mapped to zero or more logical processors.
One or more virtual processors are allocated to exactly one virtual machine.A virtual machine (VM) has one or more virtual processors.
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