Linux Redhat 4 not showing Multi processors

[zum]

Hi.

I'm running RedHat 4 kernel 2.6.9-78.ELsmp. I have a new Dell server that has 2 Quad processors. My system is only showing 4 processors running. I should show 8. Any suggestions on what the problem could be or how I can get the system to show the other processors?

Thanks.

 

[BatmanHFT]

What is the BIOS showing?

 

[zum]

My bios version is 2.5.0

Thanks

 

[BatmanHFT]

Sorry I meant how many processors does the BIOS show?

 

[QatQat]

I don't think that kernel can manage quad core processors.


QatQat

If I could have sex each time I reboot my server, I would definitely prefer Windoz over Linux!

 

[Grenage]

While that kernel shouldn't have any problems with four cores, it would be worth updating it.

"We can categorically state that we have not released man-eating badgers into the area" - Major Mike Shearer

 

[zum]

My Bios does show 2 quad core processors. I have to use RedHat 4, because the application I'm want to run on it is only compatible with Red Hat 4. Which sucks.

 

[BadBigBen]

@QatQat - Kernel 2.6.9-78.ELsmp supports 8 cores!!!

@Zum - have a read, it may give you some insights into the problem, specially the section that talks about isolation of CPU cores...

How can I dedicate one or more CPU's on a multi-processor system for exclusive use by one or more specific applications?



Ben

"If it works don't fix it! If it doesn't use a sledgehammer..."

How to ask a question, when posting them to a professional forum.

 

[QatQat]

from an old RH security advisory (2006), concerning RHEL vers4.

Kernel updates were made available for some hundreds of little issues among which

Bug No Description
178839 - CPU's being incorrectly numbered
180405 - kabi violation in multi-core detection patch


If that's the case a fresher kernel should fix that.
Anyway post the lines referring to

Siblings
COres
Physical id
Cpu cores
Core id

in your /proc/cpuinfo and let's see what your kernel has to say about your CPUs.

Having to use RHEL 4 doesn't mean you are stuck with the old kernel. I would recommend updating it anyway.


QatQat



If I could have sex each time I reboot my server, I would definitely prefer Windoz over Linux!