On Aug 10, 2015, at 10:00 AM, Corinna Vinschen <corinna-cyg...@cygwin.com> wrote: > > for testing, I need somebody running a small test program on a machine > with more than 64 CPUs under Windows 7 or later.
I don’t think that’s possible today. Windows 7 Professional is limited to 2 physical processors and 256 cores, so the only way to get the result you want is a 2x33+ core system without Hyperthreading, or a 2x17+ core system with HT. Source: http://windows.microsoft.com/en-US/windows7/products/system-requirements The lesser versions of Windows 7 also have 256-core limits, but only allow 1 physical processor, so you’d need a 65+ core processor without HT, or 33+ with HT. According to Newegg, the biggest ones available today are 16-core, so you can just barely hit 64 on Win7 Pro with HT, today. I think you need to wait another processor generation to break 64 logical cores under Windows 7. The contemporaneous version of Server is, I believe 2008 R2, which has 4+ socket limits in all but the Foundation version, which would let you get to your 72 or 96 logical processor counts with today’s processors. Source: https://en.wikipedia.org/wiki/Windows_Server_2008_R2#Editions -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
