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Re: Somebody having access to a Windows machine with > 64 CPUs?
- From: Warren Young <wyml at etr-usa dot com>
- To: cygwin at cygwin dot com
- Date: Mon, 10 Aug 2015 10:23:52 -0600
- Subject: Re: Somebody having access to a Windows machine with > 64 CPUs?
- Authentication-results: sourceware.org; auth=none
- References: <20150810160011 dot GC13029 at calimero dot vinschen dot de>
On Aug 10, 2015, at 10:00 AM, Corinna Vinschen <firstname.lastname@example.org> 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 donât think thatâs 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.
The lesser versions of Windows 7 also have 256-core limits, but only allow 1 physical processor, so youâd 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 todayâs processors.
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