Re: why cpu MHz in /proc/cpuinfo different from model spec?

At Fri, 31 Oct 2008 02:38:06 +0100 (CET) Bill Marcum <marcumbill@xxxxxxxxxxxxx> wrote:


On 2008-10-31, Bennett Haselton <bennett@xxxxxxxxxxxxx> wrote:
I lease a couple different dedicated servers with different hardware
specs. As far as I can tell, in /proc/cpuinfo , when it's an Intel
chip, the megahertz given in the model name agrees closely with the
actual value of "cpu MHz" reported:

model name : Intel(R) Celeron(R) CPU 2.80GHz
stepping : 9
cpu MHz : 2800.618
===
model name : Intel(R) Celeron(R) CPU 1.70GHz
stepping : 3
cpu MHz : 1717.057
===
model name : Intel(R) Celeron(R) D CPU 3.33GHz
stepping : 5
cpu MHz : 3330.268

but when it's an AMD chip, the reported cpu MHz is much less:

model name : AMD Athlon(tm) XP 2800+
stepping : 0
cpu MHz : 2125.300
===
model name : AMD Sempron(tm) 2500+
stepping : 1
cpu MHz : 1749.922
===
model name : AMD Sempron(tm) 2200+
stepping : 1
cpu MHz : 1494.263

I think the machines are mostly running CentOS. Has the evil
Microsoft/Intel conspiracy extended to engulf CentOS as well, so that
it's now deliberately reporting AMD chips as slower? :) Or is there a
simpler explanation.

AMD model numbers are higher than the actual clock speed, because AMD
claims that their processors are equivalent to an Intel processor of
that speed.

AH! Like the Cirus (SP?) P166 that clocks at 133Mhz? I use to have one
of these (still have the motherboard, but the system is otherwise
stripped and no longer functional).




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