[ale] lost a cpu core

[Geoffrey]

Lightner, Jeff wrote:
> 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.

Macbook Pro, no bios per se.

> 
> 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