Re: Odd /proc/cpuinfo

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On 01/12/2010 12:10 AM, Ashley M. Kirchner wrote:
>      So I never paid attention to this since I always assumed the system
> will do The Right Thing (TM), however while going through servers today,
> I came across this discrepancy and was hoping someone here could help me
> figure out what's going on.
>
>      While 'cat'ing /proc/cpuinfo I see this (other information removed):
>
>          vendor_id       : GenuineIntel
>          cpu family      : 15
>          model           : 4
>          model name      : Intel(R) Pentium(R) 4 CPU 3.40GHz
>          stepping        : 10
>          cpu MHz         : 2400.000
>          cache size      : 2048 KB
>
>      Someone please explain to me how the CPU is a 3.4GHz CPU (which I've
> verified by reading it right off of the top of the processor) and yet
> two lines down it says that it's 2400.000 MHz (or 2.4GHz)  What happened
> with the missing 1GHz?  The second CPU reports the same thing.
>
>      Is this a motherboard issue?  Possibly not configured right?  If so,
> boy do I feel stupid considering this machine has been in production for
> a long time and no one's ever noticed.
>
>      Comments?
>
>      A
>    

it is because Intel SpeedStep is enabled in BIOS ... just disable Intel 
SpeedStep.. and see what happens ( probably you will get the actual 
rating of the CPU in /proc/cpuinfo. SpeedStap is on-demand frequency 
scaling ...it allows system to utilise CPU as per the need.

for more details please .... visit

1)   http://en.wikipedia.org/wiki/SpeedStep

2) 
http://software.intel.com/en-us/articles/enhanced-intel-speedstepr-technology-and-demand-based-switching-on-linux/

Regards
-- 

   °v°
  /(_)\
   ^ ^  Jatin Khatri
Registerd Linux user No #501175
www.counter.li.org
No M$

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