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-   -   4 processor listings in cpuinfo on dual processor system. (https://www.linuxquestions.org/questions/linux-hardware-18/4-processor-listings-in-cpuinfo-on-dual-processor-system-143832/)

atticboy1 02-08-2004 06:26 PM

4 processor listings in cpuinfo on dual processor system.
 
I'm running a dual xeon system with RHEL 3, when I check to see if both processors are recognized by doing:
more /proc/cpuinfo | grep processor
I am seeing:
processor : 0
processor : 1
processor : 2
processor : 3

I am NOT running with 4 processors...I wish I was, but that's not the case. Has anyone seen RH Linux see two processors as 4 before? Does anyone know how to correct the number of cpus?

TBC Cosmo 02-08-2004 06:32 PM

That just means your Xeons are hyperthreaded. Each processor is recognized as 2.

http://www.intel.com/technology/hyperthread/

atticboy1 02-08-2004 06:35 PM

Thanks TBC Cosmo!


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