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multithreadingvisual-c++cpu-cores

multiple cpu's , multiple cores, and thread count

System config: Win 7 64bit, visual Studio 2010 Premium, dell t7500 with 2 xeon 5690 chips, 48 gig of ram. Each xeon has 6 cores, so there are 12 physical cores. With hyperthreading, there should be 24 logical cores.

In my C app:

Session.coresAvailable  =    omp_get_num_procs ( );
Session.threadsAvailable    =    omp_get_max_threads ( ) ;

The system comes back and tells me there are 12 cores and 12 threads. Shouldn't it be 24 threads?

Solution

  • Converting comment to answer:

    You need to enable HyperThreading in the BIOS to see all 24 threads.