tags:

views:

305

answers:

2
+1  Q: 

Does GetSystemInfo give you the total number of virtual CPUs (i.e. hyper-threaded)?

GetSystemInfo will give you the number of physical CPUs / cores, but I would like to know the total number of virtual CPUs. I.e. on the new Nahelam chips, they have 4 cores, but appear as 8 cpus.

If GetSystemInfo doesn't give this information, what API do I need (I've seen a function for getting number of logical processors, but it is Vista only. I need to support XP)?

+2  A: 

GetLogicalProcessorInformation Function ( Windows Vista, Windows XP Professional x64 Edition, Windows XP with SP3)

aJ  2009-03-13 12:10:57
Hi, we have to support a base install of WindowsXP. I guess I'll just have to use GetSystemInfo as a backup in that case.
Mark Ingram  2009-03-13 12:46:06
A: 

Use NAPI (Win32 FAQ)

 2009-03-13 14:46:38

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