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Windows 7 and Windows Server 2008 support up to 256 processors. It seems that, by
default, a process is constrained to running in a single processor group which can be as
large as 64 processors. To support more than 64 processors the scheduler needs to
become aware of "processor groups" and allocate threads explicitly to
different processor groups.
Processor groups are explained on the following page
http://msdn.microsoft.com/en-us/library/windows/desktop/dd405503(v=vs.85).aspx
Microsoft also publishes a document generally describing how to support systems with
>64 processors
http://msdn.microsoft.com/en-us/windows/hardware/gg463349.aspx
The text was updated successfully, but these errors were encountered:
Since Windows 11 and Windows Server 2022, the OS has changed to make processes and their threads span all processors in the system, lifting the 64-processors restriction:
The text was updated successfully, but these errors were encountered: