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Detecting how many cores a system has

Started by DividedByZero Jun 5, 2010 at 6:01 AM 2 replies 900+ views

Original Post

DividedByZero

Jun 5, 2010 at 6:01 AM

Is there a way to detect how many cores a CPU has (in a win32 system)?

Thanks in advance :)

rmed002

Jun 5, 2010 at 6:22 AM

Not sure if Winapi has something for that, never used it in such way.

GPUID instruction usually tells you everything you need to know about CPU, but its a bit tedious to milk the knowledge with it.

http://linux.die.net/man/1/cpuid

[Edit] Damn clipboard messed up...

benryves

Jun 5, 2010 at 6:37 AM

Windows has a GetLogicalProcessorInformation function which looks like it should do the trick.

Ohforf sake

Jun 5, 2010 at 6:55 AM

Boost has a fairly portable solution:

boost::thread::hardware_concurrency()

see http://www.boost.org/doc/libs/1_35_0/doc/html/thread/thread_management.html

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