Odd /proc/cpuinfo
Jatin K
ssh.fedora at gmail.com
Tue Jan 12 04:55:32 UTC 2010
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
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