2nd core not seen

Asked by veitch57 on 2006-03-12

i installed latest 64 bit install of ubuntu but it does not see my 2nd core,, does not seem to have SMP support please help or do i have to go to a diff distro?? cheers

Question information

Language:
English Edit question
Status:
Answered
For:
Ubuntu linux-meta Edit question
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Last query:
2006-03-12
Last reply:
2006-03-15
Ariel Vardi (ariel-vardi) said : #1

can you give us the output of 'uname -a' ?

Gabriel Bauman (gabrielbauman) said : #2

The problem is that you are not running an SMP kernel.

If you have an Intel branded Xeon (EM64T) processor, try:

 `sudo apt-get install linux-amd64-xeon`

and then reboot.

If you have an AMD branded x86_64 processor, try:

 `sudo apt-get install linux-amd64-k8`

and then reboot.

When you've booted again, verify that you are running the new kernel
 by running `uname -r`. If the output ends with "-amd64-xeon" or "-amd-k8" then you're using the new kernel.

Finally, make sure your cores are all working by making sure there are more than one CPUs listed in /proc/cpuinfo, by typing:

 cat /proc/cpuinfo | grep 'processor\|model'

You should get some output that looks like:

processor : 0
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz
processor : 1
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz
processor : 2
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz
processor : 3
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz

I hope that helps.

Gabriel Bauman (gabrielbauman) said : #3

CORRECTION:

The name of the AMD SMP package is "linux-amd64-k8-smp". I forgot the "-smp" at the end. So if you have AMD branded processors, do:

  sudo apt-get install linux-amd64-k8-smp

Sorry about that.

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