问题描述
在我的机器上，Windows 7的 - 企业，1个英特尔至强E5-1660 0 @ 3.30Ghz（6核心/ CPU超线程激活），Environment.ProcessorCount返回12，是精确的。
On my machine, windows 7 - Enterprise with 1 x Intel Xeon E5-1660 0 @ 3.30Ghz (6 cores/cpu with Hyper Threading activated), Environment.ProcessorCount return 12 which is exact.
在一个Windows Server 2012中有2个英特尔至强E5-2697 V3 @ 2.60GHz（14核/ CPU超线程激活的（我想是因为任务管理器显示：2个插槽，28核，56逻辑处理器）），Environment.ProcessorCount返回28这似乎给我们的错，因为2x14x2 = 56。
On a Windows Server 2012 with 2 x Intel Xeon E5-2697 v3 @ 2.60GHz (14 cores/cpu with Hyper Threading activated(I think because task manager show: 2 sockets, 28 cores, 56 logical processors)), Environment.ProcessorCount return 28 which appears to us as wrong because 2x14x2 = 56.
为什么在Windows Server 2012中的C＃方法Environment.ProcessorCount不返回正确的？逻辑处理器的数目
Why on Windows Server 2012 c# method Environment.ProcessorCount does not return the proper number of logical processors?
作为附加信息，环境变量如下：
NUMBER_OF_PROCESSORS = 28
As Additional information, environment variables are as follows:NUMBER_OF_PROCESSORS=28
更新2015- 05-26：
有一个更详细信息/在我的其他问题本次关联错误的原因：的。主要是我认为C＃中只能使用一个处理器组。什么是werid是，我们的服务器上，有2处理器组虽然只有56个逻辑处理器。但是，这解释为什么我们的服务器。BIOS配置是在错误诱导窗口
There is a more details/reasons of this related bug in my other question: Unable to use more than one processor group for my threads in a C# app. Mainly I think that C# does only use one processor group. What's werid was that on our server, there was 2 processor groups although there was only 56 logical processors. But this HP CUSTOMER ADVISORY explain why our server bios configuration were inducing windows in error.
推荐答案
有可能会在文档中的提示：
There may be a hint in the docs:
如果当前的机器包含多个处理器组，此属性返回逻辑处理器的数目可用作为由公共语言运行时（CLR）中使用。
"If the current machine contains multiple processor groups, this property returns the number of logical processors that are available for use by the common language runtime (CLR)."
莫非是这里的问题？
的
找到东西其他有趣的：
默认情况下，池被限制在一个单一的处理器组（的），因此64个内核。然而，在.NET 4.5，您可以设置启用=真标志Thread_UseAllCpuGroups。
By default, the pool is restricted to a single processor group (http://msdn.microsoft.com/en-us/library/windows/desktop/dd405503(v=vs.85).aspx), and thus to 64 cores. However, in .NET 4.5 you can set the Thread_UseAllCpuGroups enabled="true" flag.
的
这篇关于C＃Environment.ProcessorCount并不总是返回完整的数字逻辑处理器的，为什么呢？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！