[ale] lost a cpu core

[Lightner, Jeff]

Could be - We use RHEL 5 extensively here (up through 5.4 so far) and
haven't seen any issue with seeing multi-core CPUs.

Some systems do have settings related to hyperthreading and what not in
the BIOS.  You might want to check those out as I recall back on RHEL 3
I had to change a setting on a box related to that before doing the
install.

Funny - One of the machines I inherited here was running FreeBSD 4.8.x
and it was dog slow.  On doing a checkout one day I found that it had
two CPUs but top and other tools had always reported one.  Turned out
that in FreeBSD you had to actually tell it to use the 2nd CPU - it
didn't do it by default.  :-)

-----Original Message-----
From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of
Geoffrey
Sent: Wednesday, March 10, 2010 2:06 PM
To: Atlanta Linux Enthusiasts - Yes! We run Linux!
Subject: Re: [ale] lost a cpu core

Geoffrey wrote:
> Upgraded my macbook pro to 64 bit RHEL, and now I only see one cpu
core 
> on my: Intel(R) Core(TM)2 Duo CPU
> 
> This is confirmed via gkrellm, top and /proc/cpuinfo
> 
> If I boot off my Mandriva rescue disk, /proc/cpuinfo shows both cores.
> 
> Confirmed I'm running smp kernel:
> 
> Linux mac.serioustechnology.com 2.6.18-186.el5 #1 SMP Wed Jan 27 
> 18:11:22 EST 2010 x86_64 x86_64 x86_64 GNU/Linux
> 
> Anyone have any suggestions?


I think I figured it out. I'm running RHEL 5.5 Beta. :(


-- 
Until later, Geoffrey

"I predict future happiness for America if they can prevent
the government from wasting the labors of the people under
the pretense of taking care of them."
- Thomas Jefferson
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