Hi I am slowly learning the basics of linux and have Debian Squeeze (6.0.6) installed on my old pc as well as Win XP dual boot using grub. The installation seems to be running slow so I am in the process of reinstalling iceweasel and dabbling. However I have noticed that Debian seems to think I have 2 CPUs where I only have one. If I run I get 2 cpus both the same as below. System monitor also thinks I have 2 CPUs and reports activity for both?
However the PC is an HPD330 which only has 1 CPU P4 2.8. Is there an error in my installation of have I just misunderstood?

Hi,

If I am right, it may be hyperthreading.
Honestly I don't remember if Pentium 4 already get this.
I would search for below keyword in cpuinfo file:
- physical id
- processor

This should report the total number of physical CPUs:
grep -i "physical id" /proc/cpuinfo | sort -u | wc -l

This should report the total number of logical CPUs:
grep -i "processor" /proc/cpuinfo | sort -u | wc -l

I hope this will help.
Regards

1 members found this post helpful.

this mite help:
http://www.linuxquestions.org/questi...ml#post4782300

I'll check these out. Yes I think the CPU does do Hyperthreading so that is probably it
I'll close question down once checked out
Thanks for your help

Just an FYI: if you had a quad core processor you would get reports as if you had 4 processors. the utilities actually count CORES, they cannot 'see' how they are packaged.

I am not sure that this is involved in your specific case, just a point of clarification.

^ in that case it would probably count 8 cpu's if hyperthreading is activated.

Thanks for you help - yes I believe it was the hyper-threading that was confusing me