[ALUG] Comparison of CPU speeds

(Ted Harding) Ted.Harding at manchester.ac.uk
Wed Jul 9 23:55:11 BST 2008


On 09-Jul-08 21:39:21, Wayne Stallwood wrote:
> On Wed, 2008-07-09 at 21:43 +0100, Ted.Harding at manchester.ac.uk wrote:
>> Given that a certain simulation job (10,000 rounds) takes 6-8
>> hours on an Intel Pentium 4  CPU 2.59GHz machine, what might
>> it take (i.e. what speed factor) on a machine with
>> 
> a) IntelR CoreT2 Duo E6400  speed factor of 1.265
> 
> b) IntelR CoreT2 Duo E6600  speed factor of 1.387
> 
> c) IntelR CoreT2 Duo E6700  speed factor of 1.441
> 
>:)

Thanks for that info -- it gives me an idea. I can't respond to
your other points, since I don;t know the details, and all the
machines in question are in New Zealand! (I was just sent the
query in the form I Posted it)!
Ted.

> Seriously though..there is no way to answer this question without
> knowing a great deal about the simulation. 
> 
> In theory clock for clock a single core of a Core2 due may in some
> circumstances be faster than a P4. But does your simulation thread
> across SMP machines so can you make full use of the 2nd core ?..or does
> the machine do other things at the same time or run multiple concurrent
> instances of the simulation and therefore will benefit anyway ?
> 
> Can you recompile the simulation for 64bit arch ? Is it the sort of
> thing that would benefit from this (or even just benefit from being
> able
> to address more ram than the 32bit arch is capable of)
> 
> You might see an improvement just because you have more memory
> bandwidth..DDR2 is up to 1066 Mhz now and dual channel mainboards are
> the norm. What memory is in your current P4 ?
> 
> Alternatively is the simulation portable enough to easily test on
> someone else's machine, plenty of people (me included) have dual or
> quad
> core versions of the processor you are looking at who could benchmark
> it
> for you.
> 
> 
> 
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Date: 09-Jul-08                                       Time: 23:55:04
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