topic Re: cpu in Operating System - Linux

cpu

Chakravarthi — Tue, 24 Jun 2003 09:43:30 GMT

Hi,

i'm using a IBM server with two processors,, BIOS shows two processors, but in /proc/cpuinfo i find only one processor,,

how to i add other processor,,,

any help

Re: cpu

Bruno Vidal — Tue, 24 Jun 2003 09:54:02 GMT

Hi,
You probably use a Uniprocessor kernel. You have two solution:
-or you use a well known distribution, and you should have somewhere on cd an MP kernel.
-or you are well aware of linux, and the best is to recompile yourself a kernel by adding MP option.

In order to verify this, do:
#uname -v
For my system:
# uname -v
#20 SMP Mon May 5 13:07:38 CEST 2003

-> it is an SMP kernel, so it support multiple CPU.

Cheers.

Re: cpu

Balaji N — Tue, 24 Jun 2003 10:05:56 GMT

hi

what is the linux distro u r using.

if it is redhat, it comes with an rpm for the kernel. it should be something which contaisn the word smp(symmetric mutli(ple) processing).

or download the kernel source and recompile it from scratch enabling the smp option.
-balaji

Re: cpu

Chakravarthi — Tue, 24 Jun 2003 10:08:13 GMT

Hi,

How do i recompile the kernel, with old configuraion

i guess make oldconfig then make menuconfig then ?

chakri

Re: cpu

Bruno Vidal — Tue, 24 Jun 2003 10:14:51 GMT

Hi,
No, make oldconfig try to create a new .config file from one you have already (when upgrading you source tree for example).
Normally, when using distrib, you have at the same time, the .config file that has been used to create your actual kernel. So starting only by using make menuconfig should be enought (but check before that you have a .config file that is correct). But if download the latest source tree, you must then put in this tree the .config of your distrib, and then use make oldconfig.

Cheers.

Re: cpu

Caesar_3 — Tue, 24 Jun 2003 18:42:38 GMT

Hello!

You need to compile kernel with suport in
multi processor so compile it.
For compile flow check
/usr/src/linux-/README

Caesar