看一下Hyper-V的Program Manager的这篇普及术语的文章吧
Hyper-V Terminology
http://blogs.msdn.com/b/virtual_pc_guy/archive/2008/02/25/hyper-v-terminology.aspx
Logical Processor
This is a single execution pipeline on the physical processor. In the "good old days" someone could tell you that they had a two processor system - and you new exactly what they had. Today if someone told you that they had a two processor system
you do not know how many cores each processor has, or if hyperthreading is present. A two processor computer with hyperthreading would actually have 4 execution pipelines - or 4 logical processors. A two processor computer with quad-core processors
would in turn have 8 logical processors.
你说的没错 “如果是现在英特尔的 6核 CPU，加上超线程技术。一台两路的服务器装windows server 2008，岂不是超过了16个logical processors”
2 (Socket) *6 (Core) *2(HT) = 24 (Logical Processor即任务管理器看到的CPU数)
这一点，在 Requirements and Limits for Virtual Machines and Hyper-V in Windows Server 2008 R2 里已经写了
http://technet.microsoft.com/en-us/library/ee405267(v=ws.10).aspx
Hyper-V takes into consideration SMT (also called Hyper-Threading), counting each thread as a Logical Processor. So 4 cores on a CPU could be only 4 Logical Processors, but if the CPU supports SMT then it could be 8 Logical Processors.
