Only one core of dual core processor are working

Inkit · 03-15-2011, 08:30 PM

I'm sorry, the full result of the command is as under
Linux inkit 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686 GNU/Linux

I did not include the whole line because when I checked around in google, I found that SMP was automatically enabled in all kernels after 2.2.8 or 9 or something like that.
I ran the dmesg command sygOO, but everything I get is what appears to be the firewall audit details and has similar details to what will be displayed on firestarter under edit. there does not seem to be anything else other than that, and I don't know if I should be looking into the internet connection report. Please let me know if there is something else that I can try.
The simplest way would probably be to remove the heat sink and take a look at the processor inside, but considering that the pins are a little tight, I don't want to force it and screw up a perfectly good system just because of some fancy of mine.
Thanks everyone for your time, and I appreciate your help.

Soadyheid · 03-16-2011, 05:54 AM

You could try downloading a differnt Live CD; Ubuntu, Fedora, Mandriva or whatever. Run it up and do

Code:

cat /proc/cpuinfo

again.
Just a thoght... All a bit strange. Removing the CPU to look at a load of pins? I reckon that's a pretty long shot. A bent/broken pin would probably have given a more terminal outcome, dropping a core? Highly improbable.

Play Bonny!

Inkit · 03-16-2011, 09:20 AM

Hi Soadyheid, I understand what you mean. I got an answer in another forum that sometimes hyperthreaded cpu's show up as a dual core in xp which may answer my question in that XP showed that my processor was a dual core, but linux shows only a single core. What do you think?

syg00 · 03-16-2011, 10:36 AM

Let's see the output from this (cut-and-paste it)

Code:

grep -iE "sched_smt|sched_mc|x86_ht" /boot/config-$(uname -r)

I just checked Mint 10 (LMDE) on an i7 processor (4 cores hiperthreaded), and it correctly shows 8 processors in cpuinfo.

Soadyheid · 03-16-2011, 11:27 AM

Quote:

I got an answer in another forum that sometimes hyperthreaded cpu's show up as a dual core in xp which may answer my question in that XP showed that my processor was a dual core, but linux shows only a single core. What do you think?

Hyperthreading shows as an extra core in Linux as well, in fact at one time Windows systems couldn't handle multiple cores/hyperthreading (W'98 I think) while Linux could!

Play Bonny!

Inkit · 03-16-2011, 07:44 PM

Hi SygOO, Please find below the output for your command,

inkit@inkit ~ $ grep -iE "sched_smt|sched_mc|x86_ht" /boot/config-$(uname -r)
CONFIG_X86_HT=y
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y

I'm guessing that the HT=y and SMT=y means that my version of linux supports both hyperthreading and dual cores (can't connect MC with anything in my mind). Does that mean that my cpu is really a single core? Is it possible that a single core can show up as a dual core on XP for any reason?