dual xeons and linux kernel 188.8.131.52 - sees 4 processors instead of 2. Why?
Jacob Bunk Nielsen
jbn at exiqon.com
Thu May 18 07:39:54 CDT 2006
"Paul" <ptuohy at digibug.com> writes:
> I have a Poweredge 1800 with dual Xeon processors. I just compiled the linux
> 184.108.40.206 kernel. In the kernel config, I set the Maximum number of CPUs
> (NR_CPUS) to 2 because I have 2 processors. However, I notice that the boot
> message reports the following:
Don't you think it's because it uses hyperthreading? You can try to
disable hyperthreading from the BIOS.
> Is this because the Xeon processors are 64bit? Does the kernel see each
> processor as 2 CPUs. Is there something wrong? Can anyone explain this to
Some of the older 32 bit Xeons also have hyperthreading and show up as
two processors to the operating system.
More information about the Linux-PowerEdge