Get the number of CPUs or cores in a system

dandaman32 · 30th June 2008, 04:39

Hey it's me again! *breathes in the Winamp-forumy nostalgia*

So I'll keep it short and sweet. I broke out the ol' WinXP license to work on an installer for a paying client. I need to be able to detect the number of CPUs or cores in a system and can't seem to find out from Google how to do this with NSIS or any of its plugins. Anyone know of a plugin that can do this, or maybe someone with Windows API knowledge could hack something up in ten minutes? Thanks!

--Dan

Red Wine · 30th June 2008, 05:35

http://nsis.sourceforge.net/CPUDesc_plug-in

Mr Inches · 1st July 2008, 13:05

You could also use the built-in registry functions to enumerate the keys and values under the following key (Windows only of course):

HKLM\HARDWARE\DESCRIPTION\SYSTEM\CentralProcessor

This is the key that Windows populates during bootup so it reflects the actual number of processors/cores that Windows sees including changes in BOOT.INI/BCD to limit them.

There is one sub-key for each processor (0,1,2,3 etc) and the values are the description of processor characteristics including approximate clock speed and processor brand/model.

Duncan

30th June 2008, 04:39	#1
dandaman32 Senior Member Join Date: Jan 2005 Location: Look behind you. Posts: 209	Get the number of CPUs or cores in a system Hey it's me again! breathes in the Winamp-forumy nostalgia So I'll keep it short and sweet. I broke out the ol' WinXP license to work on an installer for a paying client. I need to be able to detect the number of CPUs or cores in a system and can't seem to find out from Google how to do this with NSIS or any of its plugins. Anyone know of a plugin that can do this, or maybe someone with Windows API knowledge could hack something up in ten minutes? Thanks! --Dan ExperienceUI for NSIS \| Latest project: Enano CMS Do not PM me on the Winamp forums, I hardly ever check my messages here; you are more likely to get my attention through the ExperienceUI forum.

30th June 2008, 05:35	#2
Red Wine Forum King Join Date: Mar 2006 Location: Ath. GR Posts: 2,078	http://nsis.sourceforge.net/CPUDesc_plug-in Quick AVI Creator - Quick and easy convert from DVD/MPEG/AVI/MKV to AVI/MP4/MKV Quick AVI Creator entirely edited with NSIS and entirely upgraded to Unicode NSIS

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1st July 2008, 13:05	#3
Mr Inches Member Join Date: Jan 2006 Location: Canberra, Australia Posts: 76	You could also use the built-in registry functions to enumerate the keys and values under the following key (Windows only of course): HKLM\HARDWARE\DESCRIPTION\SYSTEM\CentralProcessor This is the key that Windows populates during bootup so it reflects the actual number of processors/cores that Windows sees including changes in BOOT.INI/BCD to limit them. There is one sub-key for each processor (0,1,2,3 etc) and the values are the description of processor characteristics including approximate clock speed and processor brand/model. Duncan